作　　者： ; ; ; ; ;

机构地区： 四川大学化学工程学院过程装备与安全工程系

出　　处： 《电源技术》 2003年第3期301-304,共4页

摘　　要： 采用开口电池方式研究了三种不同粒度及用量的Ni粉添加剂对贮氢负极合金利用率、放电比容量、放电电压和循环寿命的影响。结果表明:5%(质量分数)的Ni粉添加量有最好的放电综合性能,特别是循环稳定性;增加Ni粉添加量显著提高了负极的合金利用率和放电中值电压,5%Ni添加量时0.2C放电合金利用率提高了8%～14%,1C放电合金利用率也提高了10%～12.5%,放电中值电压从1.19V提高到1.22V;Ni粉粒度减小负极利用率分别提高了8.1%、11.7%和13.8%,质量比容量提高了2.1%、9.1%和13.9%,但增大了容量衰减率,并且对放电电压影响不大。 Effects of the n ickel powder additives with various part icle size and content on the utilization rate, specific discharge capacity, capa city density, discharge potential and cy cle life of the hydrogen storage alloy a s negative material for Ni-MH battery we re investigated by the vented cell metho d. The results show that the best comprehe nsive discharge properties, especially t he cyclic stability is obtained by using 5% (mass percentage) nickel powder. The utilization rate of negative alloy and the discharge potential is improved due to the increase of nickel powder content . With the 5% (mass percentage) nickel p ower in negative, the utilization rate o f alloy was increased by 8%-14% and 10%- 12.5% at 0.2 C and 1 C discharge rates respectively while the voltage at half discharge time is i mproved from 1.19 V to 1.22 V. In additi on, with the decreased particle size of nickel power in negative, the utilizatio n rate of alloy is increased by 8.1%, 11 7% and 13.8%, and the specific capacity is increased by 2.1%, 9.1% and 13.9%. Ho wever, the capacity fading rate is incre ased and the discharge voltage is almost not influenced.

关 键 词： 蓄电池 负极 电池性能 镍粉添加剂 电极 贮氢合金

领　　域： [电气工程]