【摘要】 以LiOH·H2O、Ni2O3、Co2O3、TiO2和Mg(OH)2为原料,应用固相反应法合成Co Ti Mg共掺杂的LiNiO2化合物LiNi0. 85Co0. 10 (TiMg)0. 025O2;TG DTA、XRD、SEM和电化学测试表明,该材料首次放电容量达182. 7mAh/g(3. 0~4. 3V, 18mA/g), 10次循环之后,容量还有 175. 5mAh/g,容量保持率为 96. 2%;与未掺杂的LiNiO2相比,该材料显示出良好的循环性能,是一种很有应用前景的锂电池正极材料.更多还原

【Abstract】 Cathode material of LiNi_0.85Co_0.10（TiMg）_0.025O₂ were prepared by solid state reaction at 725℃ for 24 h from LiOH·H₂O, Ni₂O₃, Co₂O₃, TiO₂ and Mg（OH）₂ under flowing oxygen, and were characterized by TG-DTA, XRD, SEM and electrochemical tests. Effort to simultaneously doped LiNiO₂ with Co-Ti-Mg has been tried to improve the cathode performance. The results show that co-doping definitely has a large beneficial effect in increasing the capacity (182.7mAh/g of the first discharge capacity for LiNi_0.85Co_0.10（TiMg）_0.025O₂) and cycling behavior （175.5 mAh/g after 10 cycles）. This cathode materials can be applied for lithium-ion batteries.更多还原