(浙江大学材料科学与工程学系,杭州 310027)
摘 要: 详细研究了Co对MlNi4.3-xCox Al0.7 (x=0, 0.3, 0.5, 0.7, 0.9, 1.1, 1.3)贮氢电极的动力学特性的影 响; 研究的动力学参数包括高倍率放电特性HRD、交换电流密度J0 、 极限电流密度 J L、 对称因子β 以及氢在α 相中的扩散系数Dα。 实验结果表明: 随着MlNi4.3-xCox Al0.7贮氢电极中Co含量的增大,合金的高倍率放电能力迅速减小,交换电流密度J0,极限电流密度J L, 对称因子β 以 及氢在α相中扩散系数Dα显著降低。
关键字: 合金; 电极; 动力学性能
(Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P.R.China)
Abstract:The effects of Co content on the kinetic properties, includ ing high rate dischargeability HRD, exchange current density J0, limiting current density J L, the symmetry factor β, and the diffusion coeffici ent of hydrogen in the α phase Dα, of MlNi4.3-xCox Al0.7(x="0," 0.3, 0.5, 0.7, 0.9, 1.1, and 1.3) hydride electrodes, have been studied systematically. The results show that with increasing Co content in MlNi4.3-xCox Al0.7 hydride electrodes, the HRD, J0, J L, β and Dα decrease markedly.
Key words: hydrogen storage alloy; electrode; kinetic s property