摘要
采用化学共沉淀法制备Al3+掺杂α-Ni(OH)2粉体,将其复合碳纳米管(CNTs)制成镍电极材料并研究其在高温下的电化学性能。结果表明:以混合CNTs(w=0.5%)的Al掺杂α-Ni(OH)2样品材料为活性物质制成镍电极,由其组装的MH-Ni电池在65℃高温环境下,采用0.2和1.0 C充放电制度的放电比容量分别为391.1和366.4 mAh.g-1;经40次充放电循环,放电比容量衰减率分别为6.8%、11.98%,表现出较好的高温环境电化学性能。
The effect of carbon nanotubes（CNTs） addition on the electrochemical performance of Al-substituted α-nickel hydroxide is studied at high temperature.This CNTs doped Al-substituted α-nickel hydroxide is used as electrochemical active material in the positive electrodes of rechargeable alkaline batteries.The results show that the 0.5% CNTs doped Al-substituted α-nickel hydroxide in alkaline solutions has a relatively high discharge capacity（391.1 mAh·g^-1 at 0.2 C and high discharge capacity（366.4 mAh·g^-1 at 1.0 C and good structural stability at 65 ℃.In addition,the fading rates of capacity are 6.8% at 0.2 C and 11.98% at 1.0 C after 40 cycles respectively.The 0.5% CNTs doped Al-substituted α-nickel hydroxide has better high-temperature discharge performance.
出处
《桂林理工大学学报》
CAS
北大核心
2012年第4期584-587,共4页
Journal of Guilin University of Technology
基金
广西自然科学基金项目(桂科基073101)
