研究了高温固相法合成的高压LiCoPO4电极的电化学性能.结果表明,杂质碳和Co2P的存在使LiCoPO4电极的放电容量降低,纯橄榄石相无杂质的LiCoPO4具有最大的放电容量,达到135 mAh/g.循环伏安测试结果显示,碳杂质的存在可能改变了锂脱嵌的机理.碳含量比较低时存在2个氧化峰,而碳含量比较高时只有1个氧化峰.阻抗测试结果显示,界面电容为16.9 μF/cm2,表观固相质子扩散系数是(2.0~3.4)× 10-9 m2/s.
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