LiCoPO_4 as Li-ion Cathode

摘要

LiCoPO_4 as Li-ion cathode is attractive owing to its potentially high energy storage capability. Its adoption has been slowed owing to its poor cycle life. In this paper we present results of Fe-substitution of LiCoPO_4 that improves its cycle life. We report on the nature of the substitution and the analysis of the substituted material both electrochemically and structurally. We have achieved up to 500 cycles with about 80% discharge capacity retention using an electrolyte additive to counter electrolyte degradation which would occur on this 4.8V Li-ion insertion cathode.