摘要
采用碳酸盐共沉淀法合成前驱体,经高速混合机与碳酸锂混合,通过高温焙烧得到系列改性富锂锰基材料Li[Li0.167Ni0.225Co0.05Mn0.558-yTiy]O2.通过对材料的各项性能进行比较发现,钛掺杂能明显提高材料的循环性能和倍率性能,但随着钛量的增大,材料的放电比容量有下降的趋势.
The precursor of MCO3（M=Ni,Co,Mn）,which was prepared by a co-precipitation method with carbonates as starting materials, and lithium carbonate were mixed well by a high-speed mixer. A series of Li-rich Mn-based cathode materials Li[Li0.167Ni0.225Co0.05Mn0.558-yTiy]O2 were obtained by high-temperature reaction. The substitution of Mn by Ti with y=0.02 in Li[Li0.167Ni0.225Co0.05Mn0.558-yTiy]O2 significantly improved cycling performance and rate properties of the cathode materials, and the discharge capacity decreased with higher content of Ti.
出处
《有色金属科学与工程》
CAS
2014年第4期32-36,共5页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金项目(51362004)
2011年度江西省动力电池重大科技专项资助项目
2010年度江西省重大科技专项
关键词
锂离子电池
正极材料
富锂锰基材料
电化学性能
lithium-ion battery
cathode material
Li-rich Mn-based cathode material
electrochemical properties
