(浙江大學(xué)材料科學(xué)與工程學(xué)系，杭州 310027)
摘 要: 詳細(xì)研究了Co對(duì)MlNi4.3-xCox Al0.7 (x=0, 0.3, 0.5, 0.7, 0.9, 1.1, 1.3)貯氫電極的動(dòng)力學(xué)特性的影 響; 研究的動(dòng)力學(xué)參數(shù)包括高倍率放電特性HRD、交換電流密度J0 、 極限電流密度 J L、 對(duì)稱因子β 以及氫在α 相中的擴(kuò)散系數(shù)Dα。 實(shí)驗(yàn)結(jié)果表明： 隨著MlNi4.3-xCox Al0.7貯氫電極中Co含量的增大，合金的高倍率放電能力迅速減小，交換電流密度J0，極限電流密度J L, 對(duì)稱因子β 以 及氫在α相中擴(kuò)散系數(shù)Dα顯著降低。
關(guān)鍵字: 合金； 電極； 動(dòng)力學(xué)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
