The present disclosure relates to a nano-engineered coating for cathode active materials, anode active materials, and solid state electrolyte materials for reducing corrosion and enhancing cycle life of a battery, and processes for applying the disclosed coating. Also disclosed is a solid state battery including a solid electrolyte layer having a solid electrolyte particle coated by a protective coating with a thickness of 100 nm or less. The protective coating is obtained by atomic layer deposition (ALD) or molecular layer deposition (MLD). Further disclosed is a solid electrolyte layer for a solid state battery, including a porous scaffold coated by a first, solid electrolyte coating. The solid electrolyte coating has a thickness of 60 μm or less and a weight loading of at least 20 wt. % (or preferable at least 40 wt. % or at least 50 wt. %). Further disclosed is a cathode composite layer for a solid state battery.

An electrochemical cell that includes a positive electrode with an active material acting as a cathode; a negative electrode with an active material acting as an anode; a non-aqueous electrolyte; and a separator placed between the positive electrode and negative electrode. In one embodiment, the separator includes an inorganic material, i.e., a type of boehmite, formed of nanometer-sized particles and optionally one or more binders and/or ceramic particles. In a second embodiment, at least one of the cathode, the anode, the electrolyte, and the separator includes the boehmite particles, which absorb one or more of moisture and/or hydrogen fluoride that become present in the cell. One or more of the cells may be combined in a housing to form a lithium-ion secondary battery.

A negative electrode and a lithium-sulfur battery comprising the same are provided. The negative electrode comprises a negative electrode current collector and a protective layer which is disposed on at least one surface of the negative electrode current collector and contains graphene.

The present application provides a positive electrode plate and a lithium-ion battery. A first aspect of the present application provides a positive electrode plate, and the positive electrode plate includes a positive-electrode current collector, a functional layer, and a first safety coating; where both an upper surface and a lower surface of the positive-electrode current collector include a first coating area and a second coating area, and the first coating area is provided with the first safety coating; the second coating area is provided with the functional layer, and the functional layer sequentially includes a second safety coating and a positive-electrode active layer in a direction away from the positive-electrode current collector.

Electrolytes, anodes, lithium ion cells and methods are provided for preventing lithium metallization in lithium ion batteries to enhance their safety. Electrolytes comprise up to 20% ionic liquid additives which form a mobile solid electrolyte interface during charging of the cell and prevent lithium metallization and electrolyte decomposition on the anode while maintaining the lithium ion mobility at a level which enables fast charging of the batteries. Anodes are typically metalloid-based, for example include silicon, germanium, tin and/or aluminum. A surface layer on the anode bonds, at least some of the ionic liquid additive to form an immobilized layer that provides further protection at the interface between the anode and the electrolyte, prevents metallization of lithium on the former and decomposition of the latter.

Provided are an inorganic solid electrolyte material including a sulfide-based inorganic solid electrolyte and an electron-insulating inorganic material that coats a surface of the sulfide-based inorganic solid electrolyte, is solid at 100° C., and fuses at a specific temperature, a slurry using the same, a solid electrolyte film for an all-solid state secondary battery, a solid electrolyte sheet for an all-solid state secondary battery, a positive electrode active material film for an all-solid state secondary battery, a negative electrode active material film for an all-solid state secondary battery, an electrode sheet for an all-solid state secondary battery, an all-solid state secondary battery, and a method for manufacturing an all-solid state secondary battery.

A non-aqueous electrolyte secondary battery disclosed herein includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer, an insulating layer, and a boundary layer which are provided on the positive electrode current collector. The boundary layer is positioned between the positive electrode active material layer and the insulating layer, and is in contact with the positive electrode active material layer and the insulating layer. The positive electrode active material layer contains a positive electrode active material. The insulating layer contains an inorganic filler. The boundary layer contains the positive electrode active material contained in the positive electrode active material layer and the inorganic filler contained in the insulating layer. The boundary layer contains hydrated alumina. The non-aqueous electrolyte contains lithium fluorosulfonate.

This disclosure provides a battery including a cathode, an anode positioned opposite the cathode and a carbon interface layer. The carbon interface layer includes an electrically insulating flaky carbon layer conformally encapsulating the anode. A plurality of carbon nano-onions (CNOs) defining a plurality of interstitial pore volumes are interspersed throughout the electrically insulating flaky carbon layer. An electrolyte is in contact with the carbon interface layer and the cathode. A separator is positioned between the anode and the cathode. The electrically insulating flaky carbon layer can include graphene oxide (GO). The plurality of interstitial pore volumes can be configured to transport lithium (Li) ions between the anode and the cathode via the plurality of interstitial pore volumes in a bulk phase of the electrolyte. The carbon interface layer can be configured to inhibit growth of Li dendritic structures from the anode towards the cathode.

A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode collector, a positive electrode active material layer on part of the surface of the positive electrode collector, and an insulating layer on another part of the surface of the positive electrode collector; a negative electrode including a negative electrode collector; and a negative electrode active material layer on part of the surface of the negative electrode collector; a separator that insulates the positive and negative electrodes; and a nonaqueous electrolyte. A width of the negative electrode active material layer is wider than the positive electrode active material layer. The insulating layer protrudes from the negative electrode active material layer; and exhibits a thermal shrinkage factor of 13% or less in a direction parallel to the surface of a square insulating layer sample having a side length of 5 cm and heated at 150° C. for 1 hour.

Methods for forming anode structures are provided and include transferring a flexible substrate a first deposition chamber arranged downstream from a first spool chamber, the first deposition chamber containing a first coating drum capable of guiding the flexible substrate past a first plurality of deposition units, and guiding the flexible substrate past the first plurality of deposition units while depositing a lithium metal film on the flexible substrate via the first plurality of deposition units. The method also includes transferring the flexible substrate from the first deposition chamber to a second deposition chamber, the second deposition chamber containing a second coating drum capable of guiding the flexible substrate past a second deposition unit containing a crucible capable of depositing ceramic on the lithium metal film, and guiding the flexible substrate past the crucible while depositing a ceramic protective film on the lithium metal film via the evaporation crucible.