A solid electrolyte composition includes: an inorganic solid electrolyte; binder particles having an average particle size of 1 nm to 10 μm; and a dispersion medium, in which the binder particles include a polymer that includes a component derived from a polymerizable compound having a molecular weight of lower than 1,000, and the component includes at least one of an aliphatic hydrocarbon chain to which 10 or more carbon atoms are bonded or a siloxane structure as a side chain of the polymer. The solid electrolyte composition is used in the sheet for an all-solid state secondary battery, the electrode sheet for an all-solid state secondary battery, the all-solid state secondary battery, the method of manufacturing a sheet for an all-solid state secondary battery, and the method of manufacturing an all-solid state secondary battery.

A method of making a nanostructured palladium thin film electrode is described. The method involves contacting a substrate with an aerosol comprising a solvent and a Pd(II) compound. The substrate is heated, and no hydrogen gas or an additional reducing agent is required to reduce the Pd(II) to form the deposited thin film. The nanostructured palladium thin film electrode is capable of detecting compounds such as hydrazine in an aqueous sample with a 10 nM limit of detection.

A method of making a nanostructured palladium thin film electrode is described. The method involves contacting a substrate with an aerosol comprising a solvent and a Pd(II) compound. The substrate is heated, and no hydrogen gas or an additional reducing agent is required to reduce the Pd(II) to form the deposited thin film. The nanostructured palladium thin film electrode is capable of detecting compounds such as hydrazine in an aqueous sample with a 10 nM limit of detection.

Polymer derived ceramic (PDC) materials, compositions and methods of making high capacity, long cycle, long life battery anodes to improve the performance of batteries of all types, including but not limited to coin cell batteries, electric vehicle (EV) batteries, hybrid electric vehicle (HEV) batteries, plug-in hybrid electric vehicle (PHEV) batteries, battery electric vehicle (BEV) batteries, lithium cobalt (LCO) batteries, lithium iron (LFP) batteries; and lithium-ion (Li) batteries, and lead acid batteries. Silicon is incorporated in the PDC material at a molecular level when reacting a polymer derived ceramic precursor and a silicon hydride constituent or a silicon alkoxide constituent to form a PDC composition useful as a powdered battery anode material. A predetermined amount of divinylbenzene is added as a crosslinker and a modifier to increase free carbon content. The resulting battery anode materials increase the specific capacity of a battery measured in milliampere-hours per gram (mAh/g) and increase the life cycle of a battery while minimizing distortion and stress of the anode structure.

Articles and methods including composite layers for protection of electrodes in electrochemical cells are provided. In some embodiments, the composite layers comprise a polymeric material and a plurality of particles.

Disclosed herein is a composite electrode comprising a charge-conducting material, a charge-providing material bound to the charge-conducting material, and a plurality of single-walled carbon nanotubes bound to a surface of the charge-providing material. High-capacity electroactive materials that assure high performance are a prerequisite for ubiquitous adoption of technologies that require high energy/power density lithium (Li)-ion batteries, such as smart Internet of Things (IoT) devices and electric vehicles (EVs). Improved electrode performance and lifetimes are desirable. The disclosed electrode can have a Coulombic efficiency of 99% or greater, and a stable capacity retention after 100 cycles or more. Also disclosed herein are methods of making a composite electrode.

An electricity storage device includes a negative electrode having a layered structure that includes an organic backbone layer containing an aromatic compound having an aromatic ring structure, the aromatic compound being in the form of dicarboxylate anions, and an alkali metal element layer containing an alkali metal element coordinated with oxygen in the dicarboxylate anions to form a backbone, a positive electrode that provides electric double-layer capacity, and a nonaqueous electrolyte solution provided between the negative electrode and the positive electrode, the nonaqueous electrolyte solution containing an alkali metal salt. The layered structure may be provided in layers by a π-electron interaction of the aromatic compound and may have a monoclinic crystal structure belonging to the space group P2.sub.1/c. The positive electrode may contain activated carbon having a specific surface area of 1,000 m.sup.2/g or more.

An electricity storage device includes a negative electrode having a layered structure that includes an organic backbone layer containing an aromatic compound having an aromatic ring structure, the aromatic compound being in the form of dicarboxylate anions, and an alkali metal element layer containing an alkali metal element coordinated with oxygen in the dicarboxylate anions to form a backbone, a positive electrode that provides electric double-layer capacity, and a nonaqueous electrolyte solution provided between the negative electrode and the positive electrode, the nonaqueous electrolyte solution containing an alkali metal salt. The layered structure may be provided in layers by a π-electron interaction of the aromatic compound and may have a monoclinic crystal structure belonging to the space group P2.sub.1/c. The positive electrode may contain activated carbon having a specific surface area of 1,000 m.sup.2/g or more.

An object of the present invention is to provide a lithium-ion secondary battery having a large charge and discharge capacity and excellent cycle characteristics irrespective of kind and shape of a current collector. The lithium-ion secondary battery comprises an electrode comprising a primer layer for protecting a current collector and a crosslinking agent layer comprising a compound being capable of crosslinking an aqueous binder contained in the primer layer, the both layers being disposed between a current collector and an active material layer comprising a sulfur-based active material.

An electrochemical apparatus formed by stacking and then winding a first separator, a negative electrode plate, a second separator, and a positive electrode plate. The negative electrode plate includes a negative electrode current collector, a first active material layer and a second active material layer. In a winding direction, a length of the first active material layer is greater than a length of the second active material layer. The first separator comprises a first substrate layer, a first coating layer and a second coating layer. The second separator comprises a second substrate layer, a third coating layer and a fourth coating layer. A bonding force between a first active material layer and a second coating layer is less than a bonding force between a second active material layer and a fourth coating layer.