Disclosed is a negative electrode comprising multiple coated layers to prevent dendrite formation, the process for manufacturing said electrodes and the electrochemical cells and batteries comprising the same.

A main object of the present disclosure is to provide a cathode active material capable of suppressing the reaction with a solid electrolyte. The present disclosure achieves the object by providing a coated cathode active material comprising: a cathode active material, and a coating portion coating at least a part of a surface of the cathode active material, and the coating portion includes a scandium lithium phosphate based compound or a lithium borate based compound.

The invention relates to a method for manufacturing a solid-state battery (2) comprising the steps of preparing (100) a cathode (4), preparing (400) an anode (6), and preparing (200) a solid-state electrolyte (8) to be disposed between the cathode (4) and the anode (6), wherein the solid-state electrolyte (8) is prepared by means of a coating process, wherein the coating process comprises PVD coating.

Provided is an electrode that is for use in lithium-ion secondary batteries, makes lithium-ion secondary batteries less vulnerable to a decline in capacity during charge and discharge cycles, and allows lithium-ion secondary batteries to have high durability to charge and discharge cycles. The electrode for use in lithium-ion secondary batteries includes an electrode material mixture layer including an electrode active material and a high-dielectric inorganic solid, in which the electrode active material has a surface site in contact with the high-dielectric inorganic solid and has another surface site to be in contact with an electrolytic solution, and the high-dielectric inorganic solid is a Na- or Mg-based high-dielectric inorganic solid.

Disclosed are an all-solid-state battery having a protective layer including a composite including a metal sulfide and a carbon component, and a method for manufacturing the same. The all-solid-state battery includes an anode current collector, the protective layer disposed on the anode current collector, a solid electrolyte layer disposed on the protective layer, a cathode active material layer disposed on the solid electrolyte layer, and a cathode current collector disposed on the cathode active material layer, and the protective layer includes a matrix comprising the composite including the metal sulfide and the carbon component, and a metal component distributed in the matrix and capable of alloying with lithium.

An all-solid secondary battery, including: a cathode; an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the anode comprises an anode current collector; a first anode active material layer in contact with the anode current collector and comprising a first metal; a second anode active material layer disposed between the first anode active material layer and the solid electrolyte layer and comprising a carbon-containing active material; and a contact layer between the second anode active material layer and the solid electrolyte layer, and disposed such that the contact layer prevents contact between the second anode active material layer and the solid electrolyte layer, wherein the contact layer comprises a second metal, and has a thickness less than a thickness of the first anode active material layer.

A precursor composition for a solid electrolyte is provided that is capable of achieving a high lithium ion conductivity even if the precursor composition is sintered at a temperature of 1000° C. or lower. The precursor composition for the solid electrolyte is a precursor composition for a garnet-type or garnet-like solid electrolyte containing Li, La, Zr, and M, wherein the M is one or more types of elements selected from Nb, Ta, and Sb, the compositional ratio of Li:La:Zr:M in the solid electrolyte is 7-x:3:2-x:x, a relationship of 0<x<2.0 is satisfied, and the precursor composition exhibits X-ray diffraction intensity peaks at diffraction angles 2θ of 28.4°, 32.88°, 47.2°, 56.01°, and 58.73° in an X-ray diffraction pattern.

The all-solid battery includes: a cathode layer including a cathode active material layer, an anode layer, and a solid electrolyte layer that is disposed between the cathode layer and the anode layer and includes a solid electrolyte, wherein the anode layer includes a porous anode current collector; a first anode active material layer including a first metal and a carbonaceous anode active material disposed on the porous anode current collector; a conformal coating layer including a second metal disposed on the first anode active material layer, wherein the conformal coating layer of the anode layer is between the first anode active material layer and the solid electrolyte layer, and a surface roughness of the solid electrolyte layer, proximate to the conformal coating layer, is about 2 micrometers or less.

A method for preparing a multilayer material based on active lithium, by depositing a film of active lithium on a protective layer at a sufficient speed so that substantially no oxidation of the lithium occurs, and/or during a sufficient time for the adhesion of the lithium to develop after contact with the protective layer. The multilayer material, when incorporated in an electrochemical battery as an anode, has excellent impedance stability and no formation of dendrites during the cycling. Batteries where the anode is the multilayer material are particularly efficient in terms of their coulombic efficiency.

A printable lithium composition is provided. The printable lithium composition includes lithium metal powder; a polymer binder, wherein the polymer binder is compatible with the lithium powder; and a rheology modifier, wherein the rheology modifier is compatible with the lithium powder and the polymer binder. The printable lithium composition may further include a solvent compatible with the lithium powder and with the polymer binder.