三维结构泡沫Co_3O_4的制备及电化学性能

通过电化学沉积方法在三维结构泡沫镍基体上沉积金属钴层,利用固相氧化方法制备了三维结构泡沫Co3O4负极.XRD和SEM结果显示,电化学沉积制备得到具有纳米结构的金属钴层,经固相氧化处理,在泡沫镍基体表面形成了Co3O4微米级的致密活性氧化层.通过充放电和循环伏安以及电化学阻抗等方法研究了电极的电化学性能,结果表明,当放电电位区间为0.05～3.2V时,三维泡沫Co3O4于0.2C倍率下充放电,初始容量损失为29%,经50次循环后,质量比容量为824mA·h/g,三维泡沫结构提高了Co3O4电极的循环容量保持性能和倍率性能.

Preparation and Electrochemical Performance of Three-dimensional Structure Foam Co_3O_4

Three-dimensional structure foam Co3O4 anode was prepared by electrodepositing metal cobalt on foam nickel substrate following with solid phase oxidation treatment,and SEM results show that nanostructure cobalt film was obtained by electrodeposition,and Co3O4 film was prepared by solid phase oxidation using cobalt foam as metal source.Co3O4 film was micrometer-size dense thin film.Electrochemical performance of asprepared foam Co3O4 was evaluated by galvanostatic cycling,cyclic voltammetery and electrochemi...