BORON-BASED LAYERED STRUCTURES FOR ENERGY STORAGE

摘要

Graphite is highly conductive, lightweight, stable, inexpensive, and environmentally benign, and is currently the anode material of choice for battery-powered electronic devices as well as first generation Li-ion hybrid electric vehicles. However, the low electronegativity of pure graphite limits both the open circuit voltage and its energy density. It is well-known that B substitution of C in graphite create much high level of electronegativity.1 Consequently, we investigate here two boron-based, graphitelike compounds with nearly identical lattice structures (Fig. 1), i.e., MgB2 and LiBC.