复合稀土对α-Ni_(0.8)Co_(0.05)Al_(0.15)(OH)_(2.15-2y)(CO_3)_y·xH_2O电化学性能的影响  

Effect of Multiple Rare Earths on Electrochemical Performance of α-Ni_(0.8)Co_(0.05)Al_(0.15)(OH)_(2.15-2y)(CO_3)_y·xH_2O

作　　者：庄玉贵[1] 林东风[2] 陈秀宇[1] 傅剑超[1] 

机构地区：[1]福建师范大学福清分校,福建福清350300 [2]南开大学新能源材料化学研究所,天津300071

出　　处：《中国稀土学报》2010年第4期505-509,共5页Journal of the Chinese Society of Rare Earths

基　　金：福建省教育厅科研项目(JB08247)资助

摘　　要：为了同时改善固相共沉积法合成的α-Ni0.8Co0.05Al0.15(OH)2.15-2y(CO3)y.xH2O的常、高温充放电性能,样品经混合掺杂不同比率的La2O3,Sm2O3,Y2O3,Lu2O3以及La2O3+Y2O3后,作为模拟MH/Ni电池的正极材料,在不同温度下由恒流充放电和循环伏安测定其电化学性能。结果表明:复合掺加0.5%La2O3+1.0%Y2O3(质量分数),在0.5C和5C充放电下,30℃时可分别提高样品的放电比容量3.3%和4.7%,60℃时可分别提高17.4%和19.9%。同时也改善了高温放电电位。In order to improve the regular and high-temperature charge-discharge performance of α-Ni0.8Co0.05Al0.15（OH）2.15-2y（CO3）y·xH2O synthesized by co-precipitation method,the sample was simulated as the cathode material of MH/Ni battery after being mixed with different ratios of La2O3,Sm2O3,Y2O3,Lu2O3 and La2O3＋Y2O3,and their electrochemical performance were determined by a constant current charge-discharge and cyclic voltammeter under different temperatures.It was showed that the complex admixture of 0.5% La2O3＋1.0%Y2O3 at 0.5C and 5C rate of charge-discharge,could increase the discharge capacity of the samples 3.3% and 4.7% at 30 ℃,and 17.4% and 19.9% at 60 ℃ respectively.And even more it could improve the high-temperature discharge potential.

关 键 词：Α-NI(OH)2 掺Al3+ Co2+ 复合稀土 

分 类 号：O611.1[理学—无机化学] O646[理学—化学]