Metal Hydride-Based Materials as Negative Electrode for All- Solid-State Lithium-Ion Batteries

The recently developed metal hydride (MH)-based material is considered to be a potential negative material for lithium-ion batteries, owing to its high theoretical Li storage capacity, relatively low volume expansion, and suitable working potential with very small polarization. However, it suffers from the slow kinetics, poor reversibility, and unfavourable cyclability in conventional organic liquid electrolyte systems, which enormously limit its practical application. In this chapter, we describe an all-solid-state battery system consisting of MH working electrode, LiBH4 solid electrolyte, and Li metal counter electrode. The electrochemical properties of MgH2 and TiH2 composites are investigated, which showed much better performances using LiBH4 as solid-state electrolyte than using conventional organic liquid electrolyte