有色金属科学与工程
有色金屬科學與工程
유색금속과학여공정
JIANGXI NONFERROUS METALS
2014年
4期
32-36
,共5页
锂离子电池%正极材料%富锂锰基材料%电化学性能
鋰離子電池%正極材料%富鋰錳基材料%電化學性能
리리자전지%정겁재료%부리맹기재료%전화학성능
lithium-ion battery%cathode material%Li-rich Mn-based cathode material%electrochemical proper-ties
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.
採用碳痠鹽共沉澱法閤成前驅體,經高速混閤機與碳痠鋰混閤,通過高溫焙燒得到繫列改性富鋰錳基材料Li[Li0.167Ni0.225Co0.05Mn0.558-yTiy]O2.通過對材料的各項性能進行比較髮現,鈦摻雜能明顯提高材料的循環性能和倍率性能,但隨著鈦量的增大,材料的放電比容量有下降的趨勢.
채용탄산염공침정법합성전구체,경고속혼합궤여탄산리혼합,통과고온배소득도계렬개성부리맹기재료Li[Li0.167Ni0.225Co0.05Mn0.558-yTiy]O2.통과대재료적각항성능진행비교발현,태참잡능명현제고재료적순배성능화배솔성능,단수착태량적증대,재료적방전비용량유하강적추세.
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.