Abstract: An electrochemical device including an anode having an anode current collector and a skeleton layer, the skeleton layer being disposed in an central region on the anode current collector, and a region, not covered by the skeleton layer, on the anode current collector being provided with an insulation layer; a cathode; and an electrolyte including about 1 wt % to about 40 wt % of a sulfone compound, about 1 wt % to about 40 wt % of a phosphorus compound and about 1 wt % to about 70 wt % of a fluoroether compound, based on the total weight of the electrolyte. The electrochemical device has superior cycle performance and safety performance.

Abstract: An electrochemical device includes a positive electrode, a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolytic solution. The positive electrode includes a positive current collector and a positive active material layer disposed on the positive current collector. The positive active material layer includes a positive active material. The positive active material includes an element A. The element A is selected from at least one of Al, B, Ca, Mg, Ti, Cu, Nb, Si, Zr, Y, or W. The electrolytic solution includes at least one of 1,3-propane sultone or a derivative thereof. A mass ratio of the element A in the positive active material to 1,3-propane sultone or a derivative is 1:0.2 to 1:50.

Abstract: An electrolyte includes a compound of formula 1: formula 1. R1 and R2 are each independently selected from H, halogen atom, a substituted or unsubstituted C1-10 alkyl group, a substituted or unsubstituted C3-10 cycloalkyl group, a substituted or unsubstituted C2-10 alkenyl group, a substituted or unsubstituted C2-10 alkynyl group, a substituted or unsubstituted C1-10 alkoxy group, a substituted or unsubstituted C6-10 aryl group, a substituted or unsubstituted C3-10 heteroaryl group, or any combination thereof.

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, an separator, and an electrolyte, wherein the positive electrode comprises a current collector and a positive active material layer, and the positive active material layer comprises a positive active material; and the electrolyte comprises a compound of Formula I: wherein R11, R12, R13, R14, R15 and R16 are each independently selected from: H, halogen, and the following substituted or unsubstituted groups: a C1-8 alkyl group, a C2-8 alkenyl group, a C2-8 alkynyl group, or a C6-12 aryl group; and an amount of the compound of Formula I required per 1 g of the positive active material is about 0.001 g to about 0.064 g. The present application can effectively improve high-temperature storage and high-temperature cycle performance of an electrochemical apparatus.

Abstract: The present disclosure discloses a hair-cutting roller brush with a reusable drive structure, including a roller brush frame, a blade, and a rotating cylinder; the blade is arranged in the rotating cylinder, and while the rotating cylinder rotates, the rotating cylinder simultaneously drives the blade to reciprocate to cut hair through the drive structure; the roller brush frame has a first side and a second side; a part or all of the drive structure is arranged on the second side, and a sleeve hole is defined in the other end of the rotating cylinder being in axial sleeving connection with the part of the drive structure arranged on the second side; the axial sleeving connection is used to allow the other end of the rotating cylinder to be mounted on the second side in an axial direction; meanwhile one end of the rotating cylinder moves to be mounted on the first side along the axial direction with the axial sleeving connection; when the rotating cylinder is disassembled, the part of the drive structure arra

Abstract: An electrolyte, comprising a compound of Formula I and an additive A, R1, R2, R3, R4, R5, R6, R7 and R8 are each independently selected from: hydrogen, halo, —COOX, substituted or unsubstituted C1-8alkyl, substituted or unsubstituted C2-10alkenyl, substituted or unsubstituted C2-10alkynyl, substituted or unsubstituted C1-8alkoxy, or —Ra—S(?O)2—Rb, wherein Ra is selected from substituted or unsubstituted C1-8alkylene, Rb is selected from halo or substituted or unsubstituted C1-8alkyl, and at least one of R1, R2, R3, R4, R5, R6, R7 and R8 is —COOX. When substituted, the substituent is selected from cyano or halo; and X is selected from Li+, Na+, K+ or Rb+. The additive A is at least one selected from fluoroethylene carbonate, LiPO2F2, or vinylene carbonate.

Abstract: An electrochemical apparatus including a positive electrode, a negative electrode, an electrolyte, and a separator. The positive electrode includes a positive electrode current collector and a positive active material layer disposed on the positive current collector. An X-ray photoelectron spectroscopy of the positive active material layer has a peak at 164 eV to 175 eV. The electrolyte has a retention capability of 1.0 g/Ah to 4.0 g/Ah. The electrolyte improves cycle performance, over-discharge storage performance, and safety performance of the electrochemical apparatus.

Abstract: An electrochemical device includes a separator and an electrolyte. The separator includes a first porous layer and a second porous layer; and the electrolyte includes at least one compound containing 2 to 3 cyano groups; and a pore closing temperature of the first porous layer is different from a pore closing temperature of the second porous layer.

Abstract: An electrochemical device, including a positive electrode, a negative electrode and an electrolytic solution. The positive electrode includes a positive electrode current collector and a positive active material layer having a positive active material. The negative electrode includes a negative electrode current collector and a negative active material layer having a negative active material. The electrolytic solution includes a lithium ion and an anion represented by Formula I: n is an integer in a range of 0 to 5; and R1 is selected from substituted or unsubstituted C1-C12 alkyls, substituted or unsubstituted C2-C12 alkenyls, substituted or unsubstituted C6-C20 aryls, and substituted or unsubstituted C1-C12 hydrocarbyloxys, wherein a substituent in the substitution is independently selected from a silyl, a siloxy, an amino group, an ether group, ester group, a carboxyl, a sulfonic acid group, a mercapto group, a cyano group, a halogen, or any combination thereof.

Abstract: A blade driving structure, includes a planetary gear transmission mechanism, a fixing portion is provided on a second side, a sun gear of the planetary gear transmission mechanism is fixedly connected to the fixing portion, a gear ring of the planetary gear transmission mechanism is connected to a rotating cylinder, and a planet carrier acts as a transmission output and drives a second driving shaft to rotate through a coupling; a reciprocating motion structure includes a rotating body, the second driving shaft is in circumferential transmission connection with the rotating body, and a track of the rotating body engages with a driving member to convert a rotation of the rotating body driven by the second driving shaft into a reciprocation of the driving member. The solution of the present disclosure uses the planetary gear transmission to drive the reciprocating motion structure to reciprocate by means of rotation.

Abstract: An electrolyte including at least a compound of formula I: A1, A2, and A3 are each independently selected from the following formulas I-A, I-B, I-C, or I-D, and the A1, A2, and A3 are not all I-A: m and k are 0 or 1, and n is integer from 1 to 6. R11, R13, R14, R15, R16, R17, R18, R19, R1a, R1b, R1c, and R1d are selected from hydrogen; substituted or unsubstituted C1-C10 alkylidene groups, C2-C10 alkenylene groups, C2-C10 alkynylidene groups, C3-C10 cumulative dienyl groups, C6-C10 aryl groups, or C3-C10 alicyclic hydrocarbon groups. R12 is selected from substituted or unsubstituted C1-C10 alkyl groups, C2-C10 alkenyl groups, C2-C10 alkynyl groups, C3-C10 cumulative dienyl groups, C6-C10 aryl groups, C3-C10 alicyclic hydrocarbon groups, or heteroatom-containing functional groups.

Abstract: An electrolytic solution includes the compound of Formula I and a carboxylate compound: The electrochemical device prepared with the electrolytic solution has reduced storage impedance, and improved post-storage swelling, overcharge performance and hot box performance.

Abstract: An electrolyte including an imidazolium salt compound and a pyridine compound. The electrolyte, includes a compound of Formula I and a compound of Formula II: where R1 is selected from halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; and R11, R12, R13, R14 and R15 are each independently selected from H, halo, cyano, substituted or unsubstituted C1-C12 alkyl, substituted or unsubstituted C2-C12 alkenyl, substituted or unsubstituted C2-C12 alkynyl, substituted or unsubstituted C2-C12 alkoxy, substituted or unsubstituted C3-C12 cycloalkyl, and substituted or unsubstituted C6-C12 aryl; when substituted, the substituent is halo or cyano.

Abstract: The present application relates to an electrochemical device comprising a separator and an electrolyte, wherein the separator comprises a first porous layer and a second porous layer; and the electrolyte comprises at least one compound containing 2 to 3 cyano groups.

Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte.

Abstract: An electrolytic solution, an electrochemical device containing the electrolytic solution, and an electronic device. The electrolytic solution includes ethylene carbonate, propylene carbonate, and fluoroethylene carbonate. Based on a mass of the electrolytic solution, a mass percent of the ethylene carbonate is a, a mass percent b of the propylene carbonate is 12% to 35%, a mass percent c of the fluoroethylene carbonate is 0.2% to 2.5%, and the electrolytic solution satisfies 0.1?a/b?0.75.

Abstract: Disclosed is a linkage limiting assembly applied in a vacuum cleaner, which is mounted within a frame of the vacuum cleaner. The linkage limiting assembly includes a triggering button arranged at the rear end of the frame, a pushing member configured to push an electric fan assembly or a dust barrel of the vacuum cleaner upwards, a limiting member configured to limit the maximum stroke of the electric fan assembly or the dust barrel, and a linking member connecting the triggering button with the limiting member in a force transmission manner.

Abstract: An electrochemical device, including a positive electrode, a negative electrode, a separator and an electrolyte. The electrolyte includes a nitrile compound, and the mass percentage of the nitrile compound in the electrolyte is A %; the negative electrode includes a current collector, wherein the current collector comprises a first region and a second region; the first region is provided with a negative electrode active substance layer; the second region does not comprise a negative electrode active substance layer; the area of the second region is B % of the surface area of the current collector; and A×B<600.

Abstract: A handheld vacuum cleaner includes a frame, and a dust barrel and a locking portion mounted on the frame, wherein a front end of the dust barrel and the locking portion are movable relative to each other and are arranged opposite to each other; the dust barrel has a rotatable front cover at a front side thereof; and when the locking portion and the dust barrel move with respect to each other, the front cover is automatically rotatable to open, or close on the front side of the dust barrel due to limit by the locking portion.

Abstract: An electrolyte and an electrochemical apparatus containing the electrolyte. The electrolyte includes a fluorine-containing sulfonimide lithium salt and a trinitrile compound, where based on a weight of the electrolyte, a percentage of the fluorine-containing sulfonimide lithium salt is X %, and a percentage of the trinitrile compound is Y %, where 1?X+Y?6. The electrolyte in this application can significantly improve safety performance of lithium-ion batteries.