摘要
以Ni(NO_3)_2·6H_2O、Co(NO_3)_2·6H_2O、Mn(NO_3)_2和LiNO_3为金属原料,以柠檬酸为螯合剂和燃料制备出均一的前驱体。前驱体经干燥后在氧弹中快速爆燃制备出纳米LiNi_(1/3)Co_(1/3)3Mn_(1/3)O_2粉体,并生成了高结晶度的LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2材料,其平均粒径约为200nm。将其分别在2.8～4.6V和2.8～4.3V电压范围内以0.05C速率恒流充放电,首次放电比容量分别为208.0mAh·g^(-1)和173.6mAh·g^(-1);以0.1C速率分别在2.8～4.6V和2.8～4.3V电压范围内循环20周后,容量保持率分别为89.3%和93.4%。
The homogenous precursor has been prepared using a mixed aqueous solution of Ni（N03）2·6H2O、Co（NO3）2·6H2O、Mn（NO3）2 and LiNO3 as metal sources and citric acid as chelating agent and fuel. The nanoerystalline LiNi1/3Co1/3Mn1/3O2 powder was rapidly synthesized by deflagrating the dried precursor in oxygen. The annealed LiNi1/3Co1/3Mn1/3O2 powder was mainly consisted of particle agglomerates with the primary particles size of 100-300 nrn. The high initial capacities of 208.0 mAh.g-1 （2.8--4.6 V） and 173.6 mAh·g-1 （2.8-4.3 V） were discharged at the rote of 0.05 C respectively. Its capacity retentions were 89.3% and 93.4% within the voltage range of 2.8-4.6 V and 2.8-4.3 V at 0.1 C after 20 cycles respectively.
出处
《火工品》
CAS
CSCD
北大核心
2011年第1期49-52,共4页
Initiators & Pyrotechnics
