【摘要】 以钴镍合金Co0 .2 Ni0 .8、Co0 .5Ni0 .5和Co0 .8Ni0 .2 为出发点 ,通过电解合金得到前驱体Co0 .2 Ni0 .8(OH) 2 、Co0 .5Ni0 .5(OH) 2 和Co0 .8Ni0 .2 (OH) 2 ,然后以此前驱体与锂盐混合 ,烧结后得到正极材料LiCo0 .2 Ni0 .8O2 、LiCo0 .5Ni0 .5O2 和LiCo0 .8Ni0 .2 O2 。对它们的合成条件、结构及电化学性能进行了研究。结果表明 ,用该法制备的正极材料有较好的电化学性能 ,尤其在O2 气气氛中合成的锂离子正极材料具有良好的充放电容量和循环寿命。更多还原

【Abstract】 Cathode materials LiCo 0.2Ni 0.8O 2, LiCo 0.5Ni 0.5O 2 and LiCo 0.8Ni 0.2O 2 were synthesized by heating mixtures of LiOH with corresponding precursors Co 0.2Ni 0.8 (OH) 2, Co 0.5Ni 0.5(OH) 2 and Co 0.8Ni 0.2 (OH) 2 obtained from the alloy Co 0.2Ni 0.8, Co 0.5Ni 0.5 and Co 0.8Ni 0.2 by electrolysis, respectively. The experiment results show that all the cathode materials have excellent electrochemical performance, especially those prepared in oxygen atmosphere have high charge-discharge capacity and good recycle property.更多还原