Mechanical alloying is used to prepare the Co0.9Cu0.1Si alloy. Mesoporous silicon SBA-15 is employed as the template to synthesize mesoporous carbon CMK-3. For the purpose of improving the electrochemical properties of Co0.9Cu0.1Si alloy, Co0.9Cu0.1Si+x CMK-3 (x=3%, 6%, 9% and 12% mass fraction) alloys are fabricated via ball-milling. As the negative electrodes of Ni–MH batteries, the discharge capacities of alloys are tested by the LAND CT2001A tester and three-electrode system. Finally, the composite alloys show different properties for hydrogen storage. A maximum discharge capacity (558.7mAh/g) is achieved for Co0.9Cu0.1Si+6% CMK-3 electrode. Superfluous CMK-3 is not beneficial to enhance the discharge capacity of Co0.9Cu0.1Si alloy. Moreover, Co0.9Cu0.1Si+x CMK-3 electrodes exhibit better corrosion and oxidation resistance, which leads to higher capacity retention for CMK-3/Co0.9Cu0.1Si composites. The comparative studies on HRD and kinetic properties of Co0.9Cu0.1Si and Co0.9Cu0.1Si+6% CMK-3 are also conducted. The Rct of Co0.9Cu0.1Si alloy reduces and I0 increases after doping of CMK-3. The special structural characteristics and higher conductivity of CMK-3 can offer more electrochemical active sites and accelerate hydrogen diffusion. Accordingly, the electrochemical activity and kinetic properties are enhanced for CMK-3/Co0.9Cu0.1Si composites.

中文翻译：

---

电化学储氢用介孔碳CMK-3改性Co0.9Cu0.1Si合金的制备

机械合金化用于制备钴0.9铜0.1硅合金。以介孔硅SBA-15为模板合成介孔碳CMK-3。以改善Co的电化学性能为目的0.9铜0.1硅合金、钴0.9铜0.1硅+XCMK-3 (X=3%、6%、9% 和 12% 质量分数）合金是通过球磨机制造的。作为镍氢电池的负极，合金的放电容量通过LAND CT2001A测试仪和三电极系统进行测试。最后，复合合金显示出不同的储氢性能。最大放电容量（558.7mAh/g) 实现了 Co0.9铜0.1硅+6%CMK-3 电极。多余的CMK-3不利于提高Co的放电容量0.9铜0.1硅合金。此外，钴0.9铜0.1硅+XCMK-3 电极表现出更好的耐腐蚀性和抗氧化性，这导致 CMK-3/Co 的容量保持率更高0.9铜0.1硅复合材料。Co的HRD和动力学特性的比较研究0.9铜0.1硅和钴0.9铜0.1硅+6%CMK-3 也进行了。这Rct钴0.9铜0.1Si合金降低和一世0掺杂 CMK-3 后增加。CMK-3的特殊结构特性和较高的电导率可以提供更多的电化学活性位点并加速氢扩散。因此，增强了 CMK-3/Co 的电化学活性和动力学性质0.9铜0.1硅复合材料。