CAJ | 학술논문

采用热化学气相沉积技术（CVD），在泡沫镍表面直接生长多壁碳纳米管（MWNT），以此MWNT－泡沫镍基底为电池集流体，并使用该基底、通过干粉末滚压工艺制备镍氢电池电极，对电池进行了一系列的充放电性能测试。实验结果显示，碳纳米管可以从泡沫镍内部直接长出，经过电极制备后，能够穿插到电极活性物质中间，增加活性物质与基底间结合力。这种电极结构可以有效抑制电池在充放电过程中活性物质的脱落、提高电子传输效率，使电池最大放电比容量提高约17．3％。经过200次循环后，电池容量仅仅下降24．4％。
채용열화학기상침적기술（CVD），재포말얼표면직접생장다벽탄납미관（MWNT），이차MWNT－포말얼기저위전지집류체，병사용해기저、통과간분말곤압공예제비얼경전지전겁，대전지진행료일계렬적충방전성능측시。실험결과현시，탄납미관가이종포말얼내부직접장출，경과전겁제비후，능구천삽도전겁활성물질중간，증가활성물질여기저간결합력。저충전겁결구가이유효억제전지재충방전과정중활성물질적탈락、제고전자전수효솔，사전지최대방전비용량제고약17．3％。경과200차순배후，전지용량부부하강24．4％。
In this work,we selected Ni foam as the substrate to grow MWNTs directly by the CVD technique. The MWNT-Ni foam is employed to fabricate the Ni-MH battery current collector and the positive and negative electrodes were by the dry powder roller pressing process. Then,the Ni-MH batteries were investigated from a series of charge-discharge tests. Results showed that MWNTs can root into the Ni foam substrate,and interwove through the active material particles, increasing the bonding force between the substrate and the active material. This electrode structure can effectively inhibit the loss of active material during the charge-discharge cycle and enhance the electron transfer efficiency,the maximum dis-charge specific capacity increased 17. 3% than the electrode without MWNTs,and the charge-discharge cycle stability di-minished 24. 4% only after 200 cycles.