摘要
分别采用喷雾干燥法、溶胶-凝胶法和球磨法制备前驱体合成6LiMnPO4·Li3V2(PO4)3/C复合正极材料。利用X-射线衍射、扫描电镜和恒流充放电测试对材料物相、微观形貌和电化学性能进行表征。结果表明,喷雾干燥法处理前驱体制备的复合正极材料,粒径最小(约100nm)且分布均匀,具有最高的电化学性能。0.1C倍率下的放电容量为133mAh/g,40次循环后的容量保持率达到95%,1C倍率下的放电容量为0.1C时的75%,具有较好的循环性能和倍率性能。
Three precursors of 6LiMnPO4·Li3V2（PO4）3/C composite were prepared by spray drying,sol-gel and ball milling,respectively.Crystalline structure,morphology and electrochemical performances of the composites were characterized by X-ray diffraction,scanning electron microscope and charge-discharge tests.The results indicated that the particle size of 6LiMnPO4·Li3V2（PO4）3/C synthesized by spray drying was ca.100 nm and produced the best electrochemical properties.It delivered a discharge capacity of 133mAh/g at 0.1Crate,along with the capacity retention of 95% after 400 cycles.Furthermore,the discharge capacity of 6LiMnPO4·Li3V2（PO4）3/C at 1C was 75% compared with the capacity at0.1C,presenting good cycling performance and rate capability.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第7期165-167,共3页
New Chemical Materials
基金
安徽省自然科学基金资助项目(1308085QB41)
安徽高校省级自然科学研究重点项目(KJ2014A224)
国家自然科学基金项目(21401061)
