Abstract:

In recent years, with the growing demands of lithium-ion battery (LIB) in electric vehicles (EV) or hybrid electric vehicles (HEV), the technological requirement on the high capacity and power is becoming stronger. Graphite is the most commonly used anode material in LIB, because of its high energy density, low voltage, good electronic conductivity, abundant resource and low price. However, when the graphite anode is charging at high current, lithium plating and low capacity are common problems, resulting in a low reversible capacity of LIB and serious security issues. In this paper, the research progress of fast-charge graphite material is reviewed, and several methods are proposed to evaluate the fast-charge performance, which can provide theoretical guidance for the development of fast-charge lithium-ion battery.

Key words: lithium-ion battery, graphite material, fast-charge, evaluation method