A thin film device may include an active device region, where the active device region comprises a selective expansion region. The thin film device may further include a polymer layer disposed adjacent to the active device region and encapsulating the active device region, the polymer layer comprising a plurality of polymer sub-layers. A first polymer sub-layer of the plurality of polymer sub-layers may have a first hardness, while a second polymer sub-layer of the plurality of polymer sub-layers has a second hardness, the second hardness being different from the first hardness.

A metal-air battery includes: an anode including a metal; a cathode spaced apart from the anode; and a separator between the anode and the cathode, wherein the cathode includes a first cathode layer including a first conductive material, and a second cathode layer disposed on the first cathode layer, the second cathode layer including a second conductive material, and wherein the first cathode layer provides a metal ion conduction path and the second cathode layer provides an electron transfer path.

A mobile device driven based on electric power includes a connection section configured to be electrically coupled to an all-solid-state battery having a solid electrolyte, and an obtaining section configured to obtain unique information of the all-solid-state battery electrically coupled to the connection section.

A solid-state battery cell includes a cathode, an anode, a solid-state electrolyte between the cathode and the anode, and an electrolyte-anode interfacial layer between the solid-state electrolyte and the anode. The electrolyte-anode interfacial layer comprises porous, high surface area carbon and nanostructures formed on an anode-facing surface of the solid-state electrolyte, wherein the nanostructures penetrate the porous, high surface area carbon.

A solid-state battery comprising a stack including at least one unit cell including a positive electrode layer including a positive electrode active material, a negative electrode layer including a negative electrode active material, and a solid electrolyte layer laminated between the positive and negative electrode layers, and an outer covering accommodating the stack, wherein the solid-state battery further including a pressure receiving member provided on at least a part of a periphery of the outer covering, and wherein the pressure receiving member has a thickness of less than a total thickness of the stack and the outer covering in a stacking direction of the unit cell.

A method for preparing a lithium titanium phosphate, wherein a sol-gel process is used to prepare the phosphate, includes producing a sol from source materials; converting the sol to a gel; and drying the gel to obtain a corresponding powder comprising the lithium titanium phosphate. In a substep, the method further includes adding titanium(IV) isopropoxide to water to produce precipitates of titanium hydroxide oxide, cooling a system down to a temperature of less than 10° C., and redissolving the precipitates by adding nitric acid to form an aqueous TiO.sup.2+ nitrate solution. The lithium titanium phosphate has a general composition Li.sub.1+x+yM.sub.xTi.sub.2−x(PO.sub.4).sub.3−y(SiO.sub.4).sub.y, wherein M=Al, Ga, In, Sc, V, Cr, Mn, Co, Fe, Y, La-Lu, wherein 0≦x≦0.5, and wherein 0≦y≦0.5.

The disclosure relates to microbattery devices and assemblies. In an embodiment, a device includes a plurality of microbatteries, a first flexible encapsulation film, and a second flexible encapsulation film. Each of the microbatteries includes a first contact terminal and a second contact terminal spaced apart from one another. The first flexible encapsulation film includes a first conductive layer electrically coupled to the first contact terminal of each of the microbatteries, and a first insulating layer on the first conductive layer. The second flexible encapsulation film includes a second conductive layer electrically coupled to the second contact terminal of each of the microbatteries, and a second insulating layer on the second conductive layer.

Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent heat shrinkage resistance and adhesiveness after immersion in electrolyte solution and that can cause a non-aqueous secondary battery to display excellent cycle characteristics. The composition for a functional layer contains first organic particles, second organic particles, and a solvent. The first organic particles include a polyfunctional ethylenically unsaturated monomer unit in a proportion of not less than 20 mass % and not more than 90 mass %. The second organic particles include a nitrile group-containing monomer unit in a proportion of not less than 20 mass % and not more than 80 mass % and a cross-linkable monomer unit in a proportion of not less than 0.1 mass % and not more than 10 mass %.

This invention discloses a method of fabricating a reticulated solid electrolyte/separator (RSES) which is suitable both as electrolyte and separator in a solid state battery. The reticulated composite is produced by casting and drying of a slurry which exhibits a high yield stress (greater than 50 dyne/cm2) and comprised of a high MW resin dissolved in a solvent (having solution viscosity of higher than 100 cp at 5% in NMP at room temperature) and dispersed nanoparticles of solid electrolyte of high specific surface areas (i.e. greater than 1 m2/g, preferable greater than 10 m2/g) including but not limited to LLZO, LSP, or LIPON or derivatives thereof. This reticulated solid electrolyte/separator exhibits superior cycling properties and high ionic conductivity, resists lithium dendrite penetration, and maintains a high dimensional stability (less than 10% shrinking) at elevated temperatures (up to 140° C.). In addition, the present disclosure relates to electrochemical cells comprising such a reticulated film composite to act as both electrolyte and separator.

An all-solid-state battery includes: a positive electrode layer including a positive electrode current collector and a positive electrode mixture layer; a negative electrode layer including a negative electrode current collector and a negative electrode mixture layer; and a solid electrolyte layer. The solid electrolyte layer is disposed between the positive electrode mixture layer and the negative electrode mixture layer. On a plane perpendicular to a stacking axis, an area of the negative electrode mixture layer is larger than an area of the positive electrode mixture layer. On the stacking axis, an entire portion of the positive electrode mixture layer overlaps a portion of the negative electrode mixture layer.