A battery including a stack alternating between at least one anode and at least one cathode, a primary encapsulation system covering some of the faces of the stack, at least one anode contact member operable to make electrical contact between the stack and an external conductive element, and at least one cathode contact member operable to make an electrical contact between the stack and an external conductive element. An additional encapsulation system includes two frontal regions respectively covering a respective frontal region of the primary encapsulation system and two lateral regions which cover a respective lateral region devoid of any contact member of the primary encapsulation system. Each of the two frontal regions of the additional encapsulation system further cover the frontal ends respectively of the anode contact members and the cathode contact members. The frontal regions of the additional encapsulation system form a surface continuity with the lateral regions of the additional encapsulation system.

A cobalt-free positive electrode material and a preparation method therefor, a lithium ion battery positive electrode, and a lithium ion battery, relating to the technical field of lithium ion batteries. The positive electrode material comprises a core and a shell covering the core, the core being a cobalt-free positive electrode material, the chemical formula of the core being LiNi.sub.xMn.sub.yO.sub.2, wherein 0.55≤x≤0.95 and 0.05≤y≤0.45, and the shell is a coating agent and carbon. The present method can improve the dispersibility of the cobalt-free positive electrode material during the coating process, and can also improve the conductivity of the cobalt-free positive electrode material.

The present disclosure describes a lithium solid state battery, including a cathode that includes an active material such as lithium, and an additive having a lower melting point than the active material. The additive can provide a composite cathode where a cathode-electrolyte interphase has high electronic and ionic conductivity, good mechanical deformability, and high oxidation potential.

A method for manufacturing a novel electrode is provided. The method includes the steps of applying, to a current collector, a mixture comprising an active material, a conductive additive comprising a graphene compound, a binder, and a dispersion medium; performing a drying treatment on the mixture; performing a heat treatment on the mixture at a temperature higher than a temperature of the drying treatment; reducing the graphene compound in the mixture by a chemical reaction using a reducing agent; and performing a thermal reduction treatment on the mixture at a temperature higher than the temperature of the heat treatment.

Provided in the present disclosure are a positive electrode material used for a lithium ion battery. The positive electrode material comprises substrate particles, a first cladding layer that covers the substrate particles, and a second cladding layer that covers the first cladding layer; the substrate particles contain LiNi.sub.xMn.sub.y Co.sub.zM.sub.1-x-y-zO.sub.2; the first cladding layer contains lithium cobalt oxide; and the second cladding layer contains an oxide of a transition metal.

Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, where prelithiation reagents are utilized to treat one or more of the anode and cathode. In one embodiment, the prelithiation reagent is a Li-organic complex solution comprising naphthalene and metallic lithium dissolved in an inhibitor-free THF.

A system for fabricating an electrode film for a secondary battery includes a powder film fabrication unit configured to form mixture powder with active material powder, binder powder, and conductive material powder, and fabricating a powder film roll by fibrillating the mixture powder, a base material film fabrication unit configured to form a mixture solution with carbon-based powder, the binder powder, and organic solvent, and form a base material film roll by patterning the mixture solution on a base material film, and an electrode film fabrication unit configured to dispose the base material film roll between two powder film rolls, and form an electrode film roll by overlapping and bonding the powder film and the base material film.

A coated cathode active material, a method of preparing the same, and a cathode and a non-aqueous electrolyte secondary battery, each including the same, the coated cathode active material including: a cathode active material particle and a coating layer on a surface of the cathode active material particle, the coating layer including LiAlF.sub.4, LiF, and Li.sub.3AlF.sub.6.

A method for manufacturing a lithium-ion microbattery having a capacity not exceeding 1 mAh, implementing a method for manufacturing an assembly comprising a porous electrode and a porous separator comprising a porous layer deposited on a substrate having a porosity comprised between 20% and 60% by volume, and pores with an average diameter of less than 50 nm. The separator comprises a porous inorganic layer deposited on the electrode, the porous inorganic layer having a porosity comprised between 20% and 60% by volume, and pores with an average diameter of less than 50 nm.

Disclosed is a negative electrode current collector for an anode-free lithium metal battery. The negative electrode current collector includes a PdTe.sub.2 layer and an intermediate layer to inhibit the growth of lithium dendrite, resulting in significant improves in lifespan and performance of the lithium metal battery. The negative electrode current collector further includes an ion conductive layer to improve the performance of the lithium metal battery.