Systems and methods are provided for an electrode for a lithium-ion battery cell. In one example, the electrode may include a current collector having two opposing sides, at least one of the two opposing sides being configured with a first coating layer disposed on the current collector at a first loading, where the first coating layer may include a first binder in a first weight ratio, and a second coating layer disposed on the first coating layer at a second loading, where the second coating layer may include a second binder in a second weight ratio, wherein the first weight ratio may be greater than the second weight ratio, and a ratio of the first loading to the second loading may be less than 1:2. In this way, direct current internal resistance of the lithium-ion battery cell may be decreased while maintaining or increasing adhesion within the electrode.

The present disclosure relates to a porous polymer actuator which maintains the porous structure of the polymer actuator by forming a conductive polymer layer on a commercially available porous polymer separation membrane by vapor-phase polymerization and is capable of improving fast responsiveness to organic solvents and durability by ensuring structural anisotropy, and a method for fabricating the same. The porous polymer actuator according to the present disclosure includes: a porous polymer separation membrane having pores; and a conductive polymer layer coated on one surface and in the pores of the porous polymer separation membrane, wherein the porous polymer actuator has a gradient wherein the amount of the conductive polymer coated in the pores decreases from the one surface of the porous polymer separation membrane toward the other surface.

A solid-state ion conductor includes a compound of Formula (I):
Li.sub.4+xB.sub.7O.sub.12+0.5xX.sup.1.sub.aX.sup.2.sub.1−a   Formula (I)
wherein, in Formula (I), 0≤x≤1; X.sup.1 is a pseudohalogen; X.sup.2 is a halogen; and 0<a≤1.

A positive electrode active material and a preparation method thereof, a secondary battery, and an electric apparatus are provided. The positive electrode active material in the present invention includes: a core, where the core is a lithium-containing phosphate; a first coating layer disposed on at least part of surface of the core, where the first coating layer is a carbon coating layer co-doped with titanium and nitrogen; and a second coating layer disposed on at least part of surface of the first coating layer, where the second coating layer includes Li.sub.1+xM.sub.xTi.sub.2−x(PO.sub.4).sub.3, where M is at least one element selected from aluminum, lanthanum, indium, zirconium, gallium, and scandium, and 0.2≤x≤0.8. With use of the positive electrode active material of the present invention, a high discharge capacity, excellent rate performance, and excellent cycling performance can be achieved.

The present invention provides a slurry composition comprising (a) a binder comprising a polymer comprising a fluoropolymer dispersed in a liquid medium; and (b) at least one conductive carbon material having a BET surface area of greater than 100 m.sup.2/g. Also provided are electrodes and electrical storage devices.

Provided are anode for secondary battery, preparation method thereof and secondary battery. The anode comprises metal foil and a compact film of metal phosphates disposed on a surface of the metal foil, wherein the compact film of metal phosphates comprises one or more of aluminum phosphate, copper phosphate, iron phosphate, tin phosphate, zinc phosphate, nickel phosphate, manganese phosphate, lead phosphate, antimony phosphate, cadmium phosphate and bismuth phosphate. Disposed on the surface of the metal foil is a film of metal phosphates which insulates against electrons and is arranged such that metallic ions such as lithium ions can pass therethrough. The film of metal phosphates functions like a solid electrolyte interphase, improves the compatibility of the anode with the electrolyte solution, reduces the decomposition of the electrolyte solution, and improves charging and discharging efficiency, cyclability, high and low temperatures performance and safety performance of battery.

A button cell includes a housing having a cell cup, the cell cup having a flat bottom area, a cell cup casing, and a bottom edge forming a transition between the flat bottom area and the cell cup casing, and a cell top, the cell top having a flat top area and a cell top casing. An electrode-separator assembly winding is disposed within the housing, the electrode-separator assembly winding including a multi-layer assembly that is wound in a spiral shape about an axis, the multi-layer assembly including a separator disposed between a positive electrode and a negative electrode, and a first output conductor. An insulator is disposed between an end face of the electrode-separator assembly winding and the first output conductor, wherein the first output conductor is welded to the first of the flat bottom area or the flat top area.

Provided is a process for the degradation of at least one polymer of an alkene carbonate, a polymeric composition for a lithium-ion battery electrode having a degradation residue obtained by this process, a process for the preparation thereof, an electrode and a battery incorporating it and a degradation process for the sintering of ceramics. The degradation process includes a reaction at 120° C. and 270° C., and under air of a primary amine with a poly(alkene carbonate) polyol, which depolymerizes it in order to obtain a non-polymeric degradation residue. This composition includes an active material, an electrically conductive filler, a polymeric binder and a residue from the degradation under air between 120° C. and 270° C. of a sacrificial phase which includes the polymer and which has been melt blended beforehand with the active material, with the filler and with the binder in order to obtain a precursor mixture of the composition.

The present invention relates to an electrode active material for a sodium secondary battery, including: a composite metal oxide, in which the composite metal oxide is represented by Formula (1), and in a case where a peak intensity of a (200) plane of nickel oxide which is observed in the vicinity of 43° of a powder X-ray diffraction spectrum is set as I, and a peak intensity of a (104) plane of the composite metal oxide represented by Formula (1) which is observed in the vicinity of 41° to 42.5° is set as I.sub.0, I/I.sub.0 obtained by dividing I by I.sub.0 is 0.2 or less.

Disclosed are an electrode including a polymer matrix and a catalyst including metal nanoparticles and a conductive polymer shell and, a method of preparing the same. According to various exemplary embodiments of the present invention, various hybrid nano-composites may be formed by a combination of other conductive polymers than P3HT with metal nanoparticles. For example, the method may include selectively disposing metal nanoparticles to a surface modified conductive polymer including a block copolymer of two or more types of conductive polymers.