高温固相法制备LiV_xMn_(2-x)O_4/C及其电化学性能

Synthesis and electrochemical performance of LiV_x Mn_(2-x)O_4/C prepared with high temperature solid-state method

采用高温固相法合成了LiVx Mn2-x O4/C正极材料,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)以及充放电测试考察了产物的晶体结构、微观形貌以及电化学性能。实验结果表明:合成样品的颗粒大小较均匀,同时具有最佳的电化学性能,-30℃放电容量可达到额定容量的79.3%,4.8V过充循环10次后,模拟电池的容量保持率为94.8%。

LiVxMn2-xO4/C cathode material was synthesized by high temperature solid-state meth- od. the crystal structure, surface morphology and electrochemical performance of LiVxMne 04/ C were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and charge discharge tests. the results showed that the sample had a uniform particle distribution, which delivered the best electrochemical performance. The discharge capacity of the stimulant battery at 30C could reach 79.3% of the rated capacity. The capacity retention of the stimulant battery was 94.8% after 10 cycles of 4.8V overcharge.