Abstract: Described are multilayer components comprising a solid electrolyte layer and a solid electrode layer, both comprising ceramic particles while being polymer-free as well as electrochemical cells comprising them. The processes for preparing these multilayer components, which use a hot-pressing step, are also described.

Abstract: The disclosure provides an alkali metal or alkaline earth metal rechargeable battery including an electrolyte including an ionic liquid and an alkali metal salt or alkaline earth metal salt. The battery also includes a negative electrode including a surface that contacts the electrolyte. The negative electrode also includes a negative electrode active material. The battery further includes a positive electrode including a surface that contacts the electrolyte. The positive electrode also includes a positive electrode active material. The battery also includes an electronically insulative separator between the positive electrode and the negative electrode and a casing surrounding the electrolyte, electrodes, and separator. The battery additionally includes a pressure application system that applies pressure to at least a portion of the electrode surfaces contacting the electrolyte.

Abstract: The disclosure provides a coated positive electrode active material particle including an active material having the general chemical formula AxMyEz(XO4)q, wherein A is an alkali metal or an alkaline earth metal, M includes cobalt, E is a non-electrochemically active metal, a boron group element, or silicon or any alloys or combinations thereof, X is phosphorus or sulfur or a combination thereof, 0<x?1, y>0, z?0, q>0, and the relative values of x, y, z, and q are such that the general chemical formula is charge balanced. The disclosure provides a method of attritor-mixing the active material. The disclosure provides an alkali metal or alkaline earth metal rechargeable battery including an electrolyte including an ionic liquid and an alkali metal salt or alkaline earth metal salt. The battery includes a pressure application system that applies pressure to at least a portion of the electrode surfaces contacting the electrolyte.

Abstract: A novel active material comprising graphene-fibrous carbon composite and a method of making it is provided. The composite is highly uniform and conductive. The composite comprises graphene or nanoporous graphene and fibrous carbon, preferably vapor grown carbon fibers (VGCF) and optionally a lithiummetalphosphate (LMP), preferably lithiumferrophosphate or lithiummanganesephosphate.