Abstract: To provide a wound yarn package and a method for manufacturing the same in which even if sea-island type fibers are wound around a bobbin one by one by a traverse mode, cob-webbing and curling are less likely to occur, and the variation in the heat shrinkage rate between layers constituting the yarn layer is reduced.

Abstract: A cooking backsplash assembly includes a pair of mounts that is each attachable to a vertical support surface at a location positioned over a cooking stove. A roller is positionable in the mounts when the mounts are mounted to the vertical support surface. The roller is biased to rotate in a first direction and the roller is urgeable to rotate in a second direction. A screen is wrapped around the roller when the roller rotates in the first direction. The screen is urgeable downwardly to urge the roller to rotate in the second direction to facilitate the screen to cover a wall located behind the cooking stove. The screen is comprised of a fluid impermeable material to protect the wall from cooking splatter. Additionally, the screen is comprised of a heat resistant material to resist being burned by heat from the cooking stove.

Abstract: A method and a controller determine information about a current location of a car in a shaft of an elevator. The method includes the steps of: measuring a distance between a car reference position at the car and a shaft reference position in the shaft using a laser distance measuring device; analyzing a plausibility of the measured distance taking into account plausibility information correlating with the current location of the car independently from the distance measuring; and determining the information about the current location of the car based on the measured distance and the analyzed plausibility.

Abstract: The invention relates to a monitoring system for monitoring a people conveyor system. The monitoring system comprises a wireless mesh network comprising a plurality of node devices and one or more peripheral devices. A node device joining to the wireless mesh network is configured to: obtain connection data representing a connection of the node device to a peripheral device and assign itself a sink node role, if the obtained connection data indicates a connection to a gateway device, or otherwise provide the obtained connection data to the gateway device. The gateway device is configured to: assign an operation role to the node device based on the obtained connection data. The assigned role is: a sensor node role, if the obtained connection data indicates a connection to a people conveyor related sensor device, or a router node role, if the obtained connection data indicates that the node device is not connected to any peripheral device.

Abstract: A device, for helping a wheeled vehicle to negotiate an obstacle, includes a stationary framework, a substantially horizontal frame movable between a high position and a low position in which the frame rests on the framework, and an assembly for vertically translating the frame, the assembly is supported by the framework and supports the frame, the drive assembly includes a pair of shears with X-shaped articulated arms, each arm having an end hinged to the frame and an end hinged to the framework, by translation at one end, a drive actuator for driving the frame between the low and high positions. A plate is supported by the frame and, when the frame is in the high position, translatably movable horizontally relative to the frame, so as to come into contact with a vertex of the obstacle, the plate being flush with the neighboring ground when in the low position.

Abstract: A handrail for a passenger transport system, such as an escalator or a moving walkway, wherein at least one transponder containing at least one piece of information is integrally arranged on the surface or inside the handrail, wherein the transponder is configured such that the at least one piece of information can be transmitted contactlessly from the transponder to a reader, wherein the handrail includes several layers, wherein one of the layers includes a fabric structure, and wherein the transponder is integrated into the fabric structure or rests against or on the fabric structure.

Abstract: A gripping assembly (1) designed to grasp cylindrical piles (CP) provided with a longitudinal axis (AL) in an end position: the assembly (1) comprising a first cylindrical body (10) provided with a central axis (CA) and delimited by a first upper flat face (2) and by a second lower flat face (3), parallel to each other and transversal to the central axis (CA) of the same first body (10) and a plurality of gripping members (12) evenly distributed around the central axis (CA) and radially movable to couple with one of the piles (CP) by friction: a lifting arm (20) comprising at least one support portion (22) arranged laterally with respect to a longitudinal diametral plane (M) carried by the first body (10) hinged to a plate (100)(100?) integral with the first body (10) around a first axis (TAI) transversal to the diametral plane: the first axis (TAI) being arranged on the outside of the first body (10) on the side opposite to said second face (3) with respect to the first face (2).

Abstract: A controller for controlling the operation of a crane has a control panel for the control of different functions of the crane, a two-way communication radio unit adapted to transmit and receive information from/to the controller, and a processing means connected to the control panel and the communication radio unit and adapted to control the function of the controller. The processing means, when in an operation mode, is adapted to communicate with the crane for controlling the operation of the crane, and when in a simulation mode, is adapted to communicate via the communication radio unit with a remote simulator device adapted to simulate the operation of a predefined crane. The communication radio unit is adapted to operate in the 2.4 GHz Bluetooth band. The same controller can thereby be used for both operation in the field and for a learning process.

Abstract: A hitch mount for a hoist including a main member having a proximal end and a distal end, the proximal end configured to couple with a vehicle hitch, a hoist mounting bracket at the distal end of the main member, a pulley mounted on the main member between the proximal end and the distal end, and a rope lock mounted on the main member between the pulley and the distal end.

Abstract: A portable article lifter, separator, and compressor capable moving a variety of articles. The core components are a frame, a motor, a power source, and a set of interchangeable end effectors suitable for moving different types of articles. This device is used to lift an article, separate multiple articles from each other, and compress one or more articles. Multiple devices can operate collaboratively to move a large and/or heavy article via daisy chaining the devices using synchronization modules. A transmission between the motor and the end effector controls the speed and the torque of the end effector. The device further provides an ON/Off module, a frame base, a handle, a level, wheels and rollers, and a work light.

Abstract: An intelligent logistics system for wheels is configured to access a first rim and a second rim, and includes a conveyor belt, a material rack and a moving member. The material rack includes a plurality of placement assemblies. Two of the placement assemblies are configured to place the first rim and the second rim. The moving member reciprocates between the conveyor belt and the material rack, and includes two drivers, a moving frame driven by one of the two drivers and two moving carriers driven by another of the two drivers. The two moving carriers respectively load the first rim and the second rim from the conveyor belt. The two moving carriers respectively limit the first rim and the second rim, and the two moving carriers unload the first rim and the second rim to the two of the placement assemblies of the material rack.

Abstract: A work assist system is provided for an industrial vehicle. The work assist system includes a support structure having a portion including a predefined cross-sectional shape. The work assist system further includes a clamp member having coupling structure for removably coupling the clamp member to the support structure portion, and mounting structure that removably supports a work assist item that is usable by an operator located in an operator compartment of the vehicle.

Abstract: A lift device includes a lift apparatus, a base assembly, and a controller. The lift apparatus is configured to raise and lower a removable robotic implement assembly. The base assembly is configured to support the lift apparatus and a primary mover. The primary mover is configured to provide rotational motion to one or more wheels supported by the base to move the lift apparatus. The controller is in communication with the implement assembly and the lift apparatus. The controller is configured to adjust a position of the robotic implement assembly and the lift apparatus in response to receiving instructions to perform a task.

Abstract: A self-propelled work vehicle, which comprises at least one vehicle which supports at least one main telescopic arm, which is coupled with a first end to the vehicle and supports a work apparatus at the opposite end; the apparatus comprises elements for moving a work platform which is adapted to accommodate at least one operator; the moving elements are configured to move the platform with respect to the main arm and to support the platform in a plurality of different work positions; the moving elements are supported rotatably by the main arm by way of an axial bearing, which is adapted to support the elements in one configuration chosen among at least one first working configuration and one second working configuration, which can be obtained from the first with a rotation of the elements with respect to the main arm equal to a predefined angle.

Abstract: A screw capping device for a test tube is provided. The device comprises a grasping unit configured to grasp a test tube cap and a rotating unit. The rotating unit includes a clamping assembly and a rotating assembly. The clamping assembly includes a test tube chamber used to accommodate a test tube body. A test tube pad with an inclined plane is disposed at the bottom of the test tube body. The rotating assembly includes a rotating shaft configured to drive the test tube chamber to rotate. The clamping assembly further includes a cage and cylindrical rollers. Gradient cavities are formed between the cage and the test tube chamber. The cylindrical rollers are located in the gradient cavities. The cylindrical rollers abut against and are pressed against the test tube body from a state where there is a gap between the test tube body and the cylindrical rollers.

Abstract: An elastic coupling assembly comprises a first brake gear, a second brake gear, a coupling, a plurality of elastic bodies, a plurality of first protrusions, at least two second protrusions; wherein, the plurality of first protrusions is arranged on a surface of the first brake gear which faces the second brake gear; the at least two second protrusions are arranged at intervals on the surface of the coupling which faces the first brake gear; each second protrusion has a notch, each first protrusion is clamped between two adjacent second protrusions; when the first brake gear rotates in one direction, each first protrusion comes into contact with the corresponding elastic body, when the first brake gear rotates in the other direction, each first protrusion comes into contact with the second protrusion opposite to the corresponding elastic body. The present invention further comprises an elastic can opener having the elastic coupling assembly.

Abstract: A carbonated beverage dispenser includes a tank to store carbonated water, a carbon dioxide source, and a release valve configured to release gas from the tank. The release valve may be actuated to mix the contents of the tank to increase the temperature homogeny and carbon dioxide homogeny in the tank. The tank may include sensors to monitor the temperature of the water and the amount of carbon dioxide dissolved therein.

Abstract: A system comprising, a pressurized container including hollow portion and outer portion, pressurized container maintains pressure level in the hollow portion, transport system including two conduits, one transport being coupled to an interface and a valve port, the interface coupled to the hollow portion, the interface maintains pressure level in the hollow portion, one valve port allows flow of liquid volume through one conduit to a dispensing interface via another valve port, an external container is airtight and operable to dispense another liquid volume stored within, another conduit is coupled to the external container and further valve port to refill the liquid volume via the valve, pressure regulation system connected to pressurized container, pressure regulation system including a pressure conduit extending from outer portion through a pressure interface, pressure regulation system operable to compress liquid volume in the environment and a control system controls the valve and pressure regulation sys

Abstract: A device separable from a gasoline pump, wherein the device is configured to engage the trigger mechanism of the gasoline pump's fuel nozzle to hold the fuel nozzle in the activated position, thereby enabling hands-free pumping from the fuel nozzle. The device has a set of jaws biased in a closed position yet movable to an open position through manipulation of its lever arms. Teeth provided with the set of jaws facilitate the maintaining of the fuel nozzle in the activated position.

Abstract: To provide a safety joint housing device for preventing a plug of a safety joint or a filling hose from being locked in a lower opening of a casing when the safety joint separates, thereby preventing a filling device from falling over and being damaged. A safety joint housing device 100 according to the present invention houses a safety joint 101 including a plug 10 connected to a filling hose 61 and a socket 20 provided in a filling device 200, the plug 10 and the socket 20 separating from each other when a tensile load exceeding a predetermined level is applied, the safety joint housing device 100 including: a casing 320; a substrate 80 attached to the casing 320 on a main body side of the filling device 200; and a member 30 that is provided at a lower opening 320A of the casing 320 and deforms when in contact with the plug 10 or the filling hose 61.

Abstract: A micro-nano channel structure, a method for manufacturing the micro-nano channel structure, a sensor, a method for manufacturing the sensor, and a microfluidic device are provided. The micro-nano channel structure includes: a base substrate; a base layer, on the base substrate and including a plurality of protrusions; a channel wall layer, on a side of the plurality of the protrusions away from the base substrate, the channel wall layer has a micro-nano channel; a recessed portion is provided between adjacent protrusions of the plurality of the protrusions, an orthographic projection of the micro-nano channel on the base substrate is located within an orthographic projection of the recessed portion on the base substrate. The micro-nano channels have a high resolution or an ultra-high resolution, and have different sizes and shapes.

Abstract: In an example, the present invention provides a micro-speaker device. The device has a movable diaphragm device comprising a thickness of silicon or graphene material which has a first surface and a second surface opposite of the first surface. The device has a housing enclosing the movable diaphragm device, the electrode device and an encapsulation device. The electrode device can be part of a CMOS device with electronics integrated on to the device. The device has a vented enclosure opposite of the movable diaphragm to allow air to move in and out of the one or more vent openings to generate a sound pressure signal. The diaphragm can be electrostatically actuated from one or more surfaces that include the electrode device and the encapsulation device.

Abstract: A capacitive sensor includes at least one support member, a first anchor member, a second anchor member, a first connecting member, and a second connecting member. The first anchor member is fixed to only the first substrate of the first substrate and the second substrate. The second anchor member is fixed to the first substrate and the second substrate. The first connecting member is separate from the first substrate and the second substrate and connects the first anchor member to the movable member. The second connecting member connects the first anchor member to the second anchor member. The first connecting member includes a first elastic member which is elastically deformable. The second connecting member includes at least one second elastic member which is separate from the first substrate and the second substrate and which is elastically deformable.

Abstract: The present disclosure provides a MEMS sensor. The MEMS sensor includes a first substrate having a cavity and a second substrate bonded to the first substrate. The first substrate is provided with an electrode movably disposed in the cavity and a sealed member coupling to the second substrate. The second substrate is provided with a stop member for restricting a movement of the electrode toward the second substrate and a sealing member coupling to the sealed member. The sealed member is formed by a first metal layer on the first substrate. The sealing member is formed by a second metal layer on the second substrate. A polycrystalline layer is formed on the stop member. The polycrystalline layer is disposed between the second substrate and the second metal layer.

Abstract: The present disclosure provides a MEMS device. The MEMS device includes: a substrate; a recess, disposed in the substrate; a movable portion, hollowly supported in the recess; and an isolation joint, inserted into a predetermined position of the movable portion and electrically insulating both sides of the movable portion. A shortest distance between a bottom of the recess and the movable portion is less than a distance between the bottom of the recess and the isolation joint.

Abstract: An MEMS has a substrate and a cavity arranged in the substrate. A movable element is arranged in the cavity, configured to interact with a fluid arranged in the cavity, wherein a movement of the fluid and a movement of the movable element are causally related. A first opening which connects the cavity to an environment of the substrate causes a first phase offset of a first periodic oscillation which is causally related to the movement of the movable element when passing through the first opening. A second opening which connects the cavity to the environment of the substrate causes a second phase offset, different from the first phase offset, of a second periodic oscillation which is causally related to the movement of the movable element when passing through the second opening.

Abstract: A method for manufacturing a mirror device, the method includes a first step of preparing a wafer having a support layer, a device layer, and an intermediate layer; a second step of forming a slit in the wafer such that the movable portion becomes movable with respect to the base portion by removing a part of each of the support layer, the device layer, and the intermediate layer from the wafer and forming a plurality of parts each corresponding to the structure in the wafer, after the first step; a third step of performing wet cleaning using a cleaning liquid after the second step; and a fourth step of cutting out each of the plurality of parts from the wafer after the third step. In the second step, a part of the intermediate layer is removed from the wafer by anisotropic etching.

Abstract: A system and method for producing hydrogen, including converting sulfur vapor and oxygen gas in a first zone of furnace into sulfur monoxide, injecting water into a second zone of the furnace, converting the sulfur monoxide and the water in the second zone into hydrogen gas and sulfur dioxide, discharging furnace exhaust gas (including the hydrogen gas) from the furnace, condensing sulfur vapor in the furnace exhaust gas into liquid sulfur in a condenser (heat exchanger) downstream of the furnace, and discharging the liquid sulfur from the condenser to a vessel.

Abstract: This invention is for a hydrogen generation system using a wave reformer in which shock and expansion waves are created in a manner causing head-on colliding shock waves and multi-stage compression where reacting gases within the wave reformer are heated and compressed to thermally crack or decompose one or more fuel sources, such as hydrocarbon fuels, to generate a fuel product containing hydrogen, where the internal configuration of channels within the wave reformer are defined by a shaped portion along a length thereof.

Abstract: Systems and methods for producing hydrogen and solid carbon from gaseous feedstock. The system includes a plasma reactor configured to receive and convert feedstock comprising hydrocarbons into acetylene-containing feed stream, and a refractory coupled to the plasma reactor that is configured to receive and decompose acetylene to hydrogen and solid carbon. The system is further configured to deliver one or more auxiliary feedstock comprising hydrocarbons directly to the refractory for decomposition into hydrogen and carbon. The energy required to decompose the auxiliary feedstock is provided by the energy released from decomposition of acetylene in the refractory.

Abstract: Methods of producing a hydrogen-enriched product and recovering CO2 are described. A synthesis gas stream from a hydrogen production process unit is separated in a hydrogen pressure swing adsorption unit into a high-pressure hydrogen stream and a hydrogen depleted tail gas stream, and the hydrogen depleted tail gas stream is compressed. The compressed tail gas stream is separated in a CO2 fractionation system into a CO2-enriched product stream and an overhead stream. The overhead stream is separated in an overhead hydrogen PSA system into a second high-pressure hydrogen stream and a low-pressure tail gas stream. The first and second high-pressure hydrogen streams and the CO2-enriched product stream are recovered. The low-pressure tail gas stream from the overhead hydrogen PSA system is combusted with oxygen to produce steam, electricity, or both.

Abstract: A method for recovering lithium bis(fluorosulfonyl)imide is provided in the present application. The method of the present application may comprise: mixing a slag from lithium bis(fluorosulfonyl)imide production process with a solvent of carbonate ester, to obtain a mixed material; subjecting the mixed material to solid-liquid separation, to obtain a discharged liquid and a solid slag; monitoring the chromaticity of the discharged liquid and comparing the chromaticity of the discharged liquid with a chromaticity reference; recycling the discharged liquid to the mixed material, if the chromaticity of the discharged liquid is higher than the chromaticity reference; and recycling the discharged liquid to lithium bis(fluorosulfonyl)imide production process, if the chromaticity of the discharged liquid is lower than or equal to the chromaticity reference.

Abstract: The invention discloses a lithium ferromanganese phosphate composite material and a preparation method thereof. The lithium ferromanganese phosphate composite material prepared comprises lithium ferromanganese phosphate material, additive carbon, and a hydrophobic material coating on the surface of the lithium ferromanganese phosphate. Since the hydrophobic material is coated on the surface of lithium ferromanganese phosphate, the lithium ferromanganese phosphate is insulated from outside moisture. Therefore, compared to traditional lithium ferromanganese phosphate material, this lithium ferromanganese phosphate composite material does not easily absorb water within a lithium ferromanganese phosphate battery.

Abstract: Processes for the production of microporous carbon material, for use in electrodes of supercapacitors and secondary batteries, in which particulate metal carbide material is fluidized with a halogen gas at a high temperature in a fluidized bed reactor, the halogen gas is desorbed at a lower temperature of 150° C. to at most 250° C. under vacuum, and then the material is passivated using hydrogen gas and then milled.

Abstract: The invention pertains to a process for the production of crystalline carbon nanofibre networks from pyrolysis oil in a furnace black reactor 3 which contains a reaction zone 3b and a termination zone 3c, by injecting a thermodynamically stable pyrolysis oil-comprising micro-emulsion c, comprising metal catalyst nanoparticles, into the reaction zone 3b which is at a temperature of above 600° C., preferably above 700° C., more preferably above 900° C., even more preferably above 1000° C., more preferably above 1100° C., preferably up to 3000° C., more preferably up to 2500° C., most preferably up to 2000° C., to produce crystalline carbon structure networks e, transferring these networks e to the termination zone 3c, and quenching or stopping the formation of crystalline carbon structure networks in the termination zone by spraying in water d.

Abstract: A device for converting a carbon pill into graphene is provided including a space between at least two electrically conductive surfaces, wherein the electrically conductive surfaces are configured to support a carbon pill in the space. The device also includes at least two electrodes electrically coupled to the at least two electrically conductive surfaces. The device also includes a power supply connected to the electrodes for passing a current through the electrodes to convert the carbon pill into graphene. A carbon pill for graphene conversion is also provided including a first carbon material for synthesizing to graphene by joule heating. The first carbon material is compressed from a powder form into a pill form. The carbon pill includes a second material for at least one of binding the first carbon material from a powder form into a pill form and improving conductivity of the first carbon material.

Abstract: A fluid system component can include a body that includes a multidimensional shape defined in orthogonal directions and layers stacked along one of the orthogonal directions, where at least one of the layers includes polymeric material and graphene nanoplatelets formed in situ from the polymeric material, and where the graphene nanoplatelets increase stiffness of the polymeric material.

Abstract: A silica particle includes: a quaternary ammonium salt, in which the following expressions are satisfied, 0.90?FBEFORE/FAFTER?1.10, and 5?FSINTERING/FBEFORE?20, in which FBEFORE represents a maximum frequency value of a pore diameter of 2 nm or less in the silica particles before washing, which is obtained from a pore distribution curve in a nitrogen gas adsorption method, FAFTER represents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles after washing, which is obtained from the pore distribution curve in the nitrogen gas adsorption method, and FSINTERING represents a maximum frequency value of the pore diameter of 2 nm or less in the silica particles before washing and after sintering at 600° C., which is obtained from the pore distribution curve in the nitrogen gas adsorption method.

Abstract: An ammonia manufacturing apparatus includes: an ammonia synthesis unit synthesizing ammonia under a chemical reaction using hydrogen and nitrogen as a raw material gas in a reactor; and a heat storage unit including a heating medium. The heat storage unit can supply heat from the heating medium to the ammonia synthesis unit when an amount of the raw material gas supplied to the ammonia synthesis unit increases.

Abstract: A method (10) for the processing of lithium containing brines, the method comprising the method steps of: (i) Passing a lithium containing brine (12) to a filtration step (14) to remove sulphates; (ii) Passing a product (16) of step (i) to a first ion exchange step (18) to remove divalent impurities; (iii) Passing a product (20) of step (ii) to a second ion exchange step (22) to remove boron impurities; (iv) Passing a product (24) of step (iii) to an electrolysis step (26) to produce lithium hydroxide (28); and (v) Passing a product (30) of step (iv) to a crystallisation step (32) that in turn provides a lithium hydroxide monohydrate product (34).

Abstract: A method for recovering high-purity magnesium sulfate includes: a pre-precipitation step of mixing an alkali precipitant and seawater; a concentration step of reacting a precipitate formed in the pre-precipitation step with sulfuric acid, followed by filtering to obtain a first eluate; a first precipitation step of adding ethanol to the first eluate, and then removing a first precipitated solid to obtain a second eluate; and a second precipitation step of precipitating magnesium sulfate solid by further adding ethanol to the second eluate from which the first precipitated solid has been removed.

Abstract: The present disclosure is related to systems and methods for solid-phase reactions.

Abstract: The present disclosure provides a method for improving a conductivity and a blue light filtering efficiency of a transparent conducting oxide (TCO). The method includes the following steps: placing an indium oxide-based transparent conducting material (TCM) as a sample into a sample chamber of a high-pressure apparatus, and conducting a room-temperature high-pressure treatment, where the room-temperature high-pressure treatment refers to compressing the sample to a target pressure of 51 GPa from ambient pressure at room temperature and holding the target pressure for 5 min, and then conducting decompression to the ambient pressure. The conductivity is detected during the compression and the decompression, and the blue light filtering efficiency is detected separately before and after the room-temperature high-pressure treatment.

Abstract: The invention relates to a feedstock composite comprising a metal oxide fraction and a carbonaceous fraction, a binder composition and the use thereof for obtaining the feedstock composite. Further, the invention refers to a method for obtaining the feedstock composite.

Abstract: A method for producing a particle, containing a step of heating a mixture containing TiH2 and TiO2 at 700 to 950° C., wherein a molar ratio of the TiH2 to the TiO2 contained in the mixture is 5.0 to 6.8.

Abstract: Niobium oxide particles which have a controlled crystal shape and exhibit excellent characteristics are provided. The niobium oxide particles include molybdenum. The niobium oxide particles preferably have a polyhedral, columnar or acicular shape. The MoO3 content (M1) measured by XRF analysis of the niobium oxide particles is preferably 0.1 to 40 mass % relative to the niobium oxide particles taken as 100 mass %. A method for producing the niobium oxide particles described above includes calcining a niobium compound in the presence of a molybdenum compound.

Abstract: A process for purifying a manganese sulfate solution and precipitating high purity manganese sulfate monohydrate crystals. The concentration of manganese sulfate is increased and calcium and magnesium are removed by precipitating calcium and magnesium fluoride, which are separated from the concentrated solution to produce a clarified solution. In a first crystallization step, the clarified solution is combined with a recycled manganese sulfate solution and manganese sulfate seed crystals and the mixture is heated to produce a crystal suspension. Manganese sulfate crystals are separated and the remaining solution is used to prepare solid manganese fluoride, which is separated and returned to the process to remove calcium and magnesium. The manganese sulfate crystals are redissolved in water. Undissolved solids are removed to produce a second clarified manganese sulfate solution.

Abstract: A novel method for forming a positive electrode active material is provided. In the method for forming a positive electrode active material, a cobalt source and an additive element source are mixed to form an acidic solution; the acidic solution and an alkaline solution are made to react to form a cobalt compound; the cobalt compound and a lithium source are mixed to form a mixture; and the mixture is heated. The additive element source is a compound containing one or more selected from gallium, aluminum, boron, nickel, and indium.

Abstract: In the technical field of lithium ion batteries, disclosed is a wet synthesis method of a high-nickel NCMA quaternary precursor. The method includes synthesizing solid tiny crystal nuclei of the NCMA quaternary precursor in a first reactor, and prompting the crystal nuclei of the quaternary precursor to grow to a certain particle size in a second reactor, wherein in the first reactor, an upper feeding mode is used to continuously produce the solid tiny crystal nuclei of the NCMA quaternary precursor. In the second reactor, an upper-and-lower dual feeding mode is used to prompt the continuous growth of the solid tiny crystal nuclei of the NCMA quaternary precursor. During a washing process, the NCMA quaternary precursor is washed with a mixed alkali solution of sodium carbonate and sodium hydroxide at certain concentration, so that Na can be reduced below 50 ppm and sulfur can be reduced below 800 ppm.

Abstract: The present invention relates to a positive electrode material comprising a core material and a coating layer coated on the surface of the core material, the core material comprises nickel hydroxide, and the coating layer comprises a tetravalent cobalt compound; and based on the weight of the coating layer, the content of the tetravalent cobalt compound is no less than 45 wt %. The present invention also relates to a preparation method for the positive electrode material. The present invention further relates to an alkaline secondary battery containing the positive electrode material.