Abstract: Provided are a cathode active material for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery comprising the same. The cathode active material for a lithium secondary battery comprises: a lithium metal compound; and a lithium compound disposed on the surface of the lithium metal compound, wherein the content of lithium contained in the lithium compound is 0.25 parts by weight or less with respect to 100 parts by weight of the lithium metal compound, wherein the specific surface area of the lithium compound is between 0.5 m2/g and 2.0 m2/g, and the pH of the lithium compound is between 11.5 and 12.3.

Abstract: A fuel cell system without a high pressure line of a hydrogen supplying system, including a gas charging line formed between a gas charging station and a high pressure vessel charged with gas by the gas charging station, and a gas supplying line formed between the high pressure vessel and a stack, includes: a regulator provided in the gas supplying line; a solenoid valve provided in the gas supplying line between the regulator and the high pressure vessel; and a check valve provided in a bypass line connecting one point of the gas supplying line between the regulator and the solenoid valve and one point of the gas charging line.

Abstract: Devices for reducing the open circuit voltages of solar systems are described. In one embodiment, a solar system includes a string of a plurality of solar modules having an open circuit voltage. The solar system also includes a device for reducing the open circuit voltage of the string of the plurality of solar modules during an open circuit configuration.

Abstract: A roof integrated solar power system includes a plurality of solar modules. Each solar module carries a photovoltaic or solar panel with solar cells. Edge regions of the solar module are disposed to the sides of the solar panel and are devoid of solar cells. An electrical component such as a junction box or micro-inverter, or DC optimizer is mounted on top of the solar module within at least one of the edge regions. Cabling for interconnecting the electrical component to electrical components of others of the plurality of solar modules also is located within the side regions. In one embodiment, the electrical component and cabling is disposed within a recess within a side region and covered by a flat access panel. In another embodiment, the electrical component and cabling is located atop the side region and is covered by an access panel in the form of a protective cover strip.

Abstract: A flexible assembly with a stainless steel mesh packaging structure includes a flexible back plate, a first hot melt adhesive, a solar cell string, a stainless steel mesh, a second hot melt adhesive, and a flexible front plate. The flexible back plate and the flexible front plate are respectively arranged on the outer surface of the first hot melt adhesive and the outer surface of the second hot melt adhesive, and the solar cell string and the stainless steel mesh are arranged between the first hot melt adhesive and the second hot melt adhesive. The stainless steel mesh is arranged at partial or all positions around the outer edge of the solar cell string and is continuously distributed or separately distributed. The stainless steel mesh is arranged around the solar cell string to further strengthen the strength of the flexible assembly and improve the tearing resistance of the flexible assembly.

Abstract: Presented in the present disclosure are nanocomposites and rechargeable batteries which are resistant to thermal runaway and are safe, reliable, and stable electrode materials for rechargeable batteries operated at high temperature and high pressure. The nanocomposites include a plurality of transition metal oxide nanoparticles, a plurality of ultrathin sheets of a first two-dimensional (2D) material, and a plurality of ultrathin sheets of a different 2D material, which act in synergy to provide an improved thermal stability, an increased surface area, and enhanced electrochemical properties to the nanocomposites. For example, rechargeable batteries that include the nanocomposites as an electrode material have an enhanced performance and stability over a broad temperature range from room temperature to high temperatures.

Abstract: It is an object of the present invention to provide a substrate for lithium ion battery separators which has high adhesion to an inorganic particle layer, can be made thin and is excellent in tensile strength and cuttability and a lithium ion battery separator including the substrate for lithium ion battery separators. The substrate for lithium ion battery separators which contains heat-resistant fibers and synthetic resin short fibers contains fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml as the heat-resistant fibers and has a content of the fibrillated heat-resistant fibers having a modified freeness of not more than 300 ml of not less than 1.0 mass % to less than 5.0 mass % based on the total of all the fiber components contained in the substrate. The modified freeness is a value measured in accordance with JIS P8121-2:2012 except that an 80-mesh wire net having a wire diameter of 0.14 mm and an opening of 0.

Abstract: A photovoltaic apparatus is provided including a first photovoltaic module and a second photovoltaic module. Each photovoltaic module includes a front sheet having an outer portion and an inner portion. The outer portion is disposed around a core to form a keder. Each photovoltaic module further includes a back sheet and a photovoltaic device disposed between the front sheet and the back sheet. Each photovoltaic device includes an array of photovoltaic cells.

Abstract: A semiconductor sintered body comprising a polycrystalline body, wherein the polycrystalline body includes silicon or a silicon alloy, wherein the average grain size of the crystal grains forming the polycrystalline body is 1 ?m or less, and wherein nanoparticles including one or more of a carbide of silicon, a nitride of silicon, and an oxide of silicon are present at a grain boundary of the grains.

Abstract: A unique, environmentally-friendly micron scale autonomous electrical power source is provided for generating renewable energy, or a renewable energy supplement, in electronic systems, electronic devices and electronic system components. The autonomous electrical power source includes a first conductor with a facing surface conditioned to have a low work function, a second conductor with a facing surface having a comparatively higher work function, and a dielectric layer of not more than 200 nm in thickness sandwiched between the respective facing surfaces of the first conductor and the second conductor. The autonomous electrical power source is configured to harvest minimal thermal energy from any source in an environment above absolute zero. An autonomous electrical power source component is also provided that includes a plurality of autonomous electrical power source constituent elements electrically connected to one another to increase a power output of the autonomous electrical power source.

Abstract: A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.

Abstract: a fuel cell system without a high pressure line of a hydrogen supplying system, including a gas charging line formed between a gas charging station and a high pressure vessel charged with gas by the gas charging station, and a gas supplying line formed between the high pressure vessel and a stack, includes: a regulator provided in the gas supplying line; a solenoid valve provided in the gas supplying line between the regulator and the high pressure vessel; and a check valve provided in a bypass line connecting one point of the gas supplying line between the regulator and the solenoid valve and one point of the gas charging line.

Abstract: A separator for a rechargeable battery includes a porous substrate and a heat resistance layer on at least one surface of the porous substrate. The heat resistance layer includes an acryl-based copolymer, an alkali metal, and a filler. The acryl-based copolymer includes a unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing unit, and a sulfonate group-containing unit.

Abstract: The present invention relates to an electrolytic copper foil for a secondary battery and a method of producing the same, and more particularly, to an electrolytic copper foil for a secondary battery, which has little change in a physical property of a copper foil before and after vacuum drying in a process of producing an electrolytic copper foil, thereby exhibiting excellent cycle life in a battery test at a high-density negative electrode, and preventing cracking. The electrolytic copper foil for a secondary battery is produced from a plating solution containing Total Organic Carbon (TOC), zinc, and iron by using a drum, in which a ratio of the TOC to the zinc and the iron contained in the electrolytic copper foil follows Formula 1 below: TOC/(zinc+iron)=1.3 to 1.5.

Abstract: Techniques related to reclamation of energy leaking from waveguides are disclosed. One or more photovoltaic cells may receive light leaking from a waveguide at a first surface of the wave guide. The first surface may be opposite to a second surface at which an in-coupling element is located. The light leaking from the waveguide results from inefficiency in redirecting incoming light for propagation within the waveguide. The one or more photovoltaic cells may generate electric power from the light leaking from the waveguide.

Abstract: Electro-magnetic (EM) energy collected in three dimensions, in layers allows for multiple planes to function operatively with optimized band gap structures whereby integrated variant and overlapping three-dimensional electro-magnetic films permit systems to collect energy across the entire electro-magnetic spectrum, and present systems utilizing both direct and indirect light to be leveraged. The EM-CS captures and contains more energy from EMR than conventional systems addressing global energy needs.

Abstract: The disclosure provides a passivated contact structure and a solar cell including the same, a cell assembly and a photovoltaic system. The passivated contact structure includes a first passivated contact region on a silicon substrate and a second passivated contact region on the first passivated contact region. The second passivated contact region has an opening connecting a conductive layer to the first passivated contact region. The first passivated contact region includes a first doped layer, a first passivation layer and a second doped layer. The second passivated contact region includes a second passivation layer and a third doped layer. The first passivation layer is a porous structure inlaid with the first doped layer and/or the second doped layer in a hole region. Utilizing the passivated contact structure provided in this invention, mitigates the serious recombination caused by metal directly contacting with silicon substrate.

Abstract: A system for providing oxygen to a fuel cell circuit includes a compressor and a fuel cell stack having a plurality of fuel cells. The system also includes a plurality of pipes and a pressure sensor designed to detect pressure at a first location. The system also includes a memory to store a model of the fuel cell circuit and an ECU. The ECU determines a control signal corresponding to desirable operation of the compressor and determines flow values of the gas through each component based on the detected pressure and the model of the fuel cell circuit. The ECU also determines pressure values of each component based on the determined flow values and the model of the fuel cell circuit. The ECU also controls operation of the compressor based on the control signal, at least one of the flow values, and at least one of the pressure values.

Abstract: Methods and apparatus for long read, label-free, optical nanopore long chain molecule sequencing. In general, the present disclosure describes a novel sequencing technology based on the integration of nanochannels to deliver single long-chain molecules with widely spaced (>wavelength), ˜1-nm aperture “tortuous” nanopores that slow translocation sufficiently to provide massively parallel, single base resolution using optical techniques. A novel, directed self-assembly nanofabrication scheme using simple colloidal nanoparticles is used to form the nanopore arrays atop nanochannels that unfold the long chain molecules. At the surface of the nanoparticle array, strongly localized electromagnetic fields in engineered plasmonic/polaritonic structures allow for single base resolution using optical techniques.

Abstract: A solar panel system is assembled into a three-dimensional volume with the solar cell(s) positioned on an inward facing surface to collect sunlight and reflect sunlight from different angles as the sun passes overhead. Embodiments may be mounted into the interior of a building with a top end of the module being positioned on or proximate a roof surface and disposed to collect sunlight into the module interior below the roof line. Some embodiments may be pyramidal shaped. Outdoor mounting of the solar panel module includes embodiments that may be held in a frame and rail mounted system.