高性能泡沫镍电极及拉浆负极的研究

Study on high performance foamed nickel electrode and slurried negative electrode

在ＭＨ－Ｎｉ电池的镍正极和ＭＨ负极中加入ＣｏＯ（Ｃｏ）可以大幅度提高Ｎｉ（ＯＨ）２和ＭＨ合金的利用率，在本论文的实验条件下，制造高性能泡沫镍电极的合适工艺为：Ｎｉ（ＯＨ）２含Ｃｏ１．３％、Ｚｎ３％，ＨＰＭＣ、ＣｏＯ、Ｃｏ掺入量分别为 ０．５％、８％、 １％。通过对导电剂、添加剂、粘合剂的种类和用量以及浆料涂敷、干燥、成型等工艺参数的最佳确定，制得的 ＭＨ－Ｎｉ电池的 １Ｃ放电容量在 １３００ ｍＡｈ以上，１Ｃ循环寿命在 ４００次以上， １Ｃ放电 １．２ Ｖ以上时间占总时 ６０％以上，内压小于 １．０ ＭＰａ。

The addition of CoO(Co) can、extremly increase the utilization of Ni(OH)2 and hydrogen storage alloy.The high performance Ni (OH)2 electrode were prepared with the optimized formulation:Ni (OH)2 (contain Co 1.3%,Zn 3%)+ 8%CoO + 1%Co + 0.5%HPMC + 35%H2O.The optimum preparation technology of the positive and the negative electrode were Studied in detail.The performance of AA size Ni-MH batteries assembled with these electrodes as positive or negative were observed.Their capacity are more than 1 300 mAh at 1 C rate,the efficient capacity with the output voltage above 1.2 V is larger than 60% of the total time at 1C rate,and capacity decay less than 20% after 400 cycles at 1 C rate,100% DOD. Their internal pressure is less than 1.0 MPa.