摘要
采用化学还原法制备了微生物燃料电池阴极材料Sn-Co合金,研究了Sn-Co合金的物相组成、表面形貌和充放电性能,并对比分析了热处理对阴极材料Sn-Co合金电化学性能的影响。结果表明,热处理前Sn-Co合金的物相组成为CoSn、CoSn_2、Sn_3O_4、SnO_2化合物以及单质Sn和Co;热处理前Sn-Co合金试样表面可见尺寸不等的细小颗粒,尺寸约在2～10μm,颗粒外表面呈现毛絮状结构特征;220℃×10 h和300℃×5 h的热处理后阴极材料Sn-Co合金的循环效率在稳定阶段高于热处理前Sn-Co合金的循环效率;220℃×10 h是阴极材料Sn-Co合金适宜的热处理工艺。
Sn-Co alloy used as cathode materials in microbial fuel cells was prepared by chemical reduction method, the phase composition, surface morphology and charge and discharge properties of Sn-Co alloy were investigated, and the effect of heat treatment on the electrochemical properties of Sn-Co alloy was analyzed. The results show that the Sn-Co alloy before heat treatment consists of the compounds of CoSn, CoSn2, Sn3O4, SnO2 and elementary substances Sn and Co. Small particles with different sizes appear on the surface of the Sn-Co alloy samples before the heat treatment, and the sizes of particles are about 2-10 μm. And the external surface of the particles shows a floc structure. The circulation efficiency during stable stage of cathode materials make from Sn-Co alloys heat treated at 220 ℃ for 10 h or 300 ℃ for 5 h is higher than that of the Sn-Co alloy without heat treatment. Furthermore, the heat treatment process of 220 ℃ ~ 10 h is appropriate for Sn-Co alloy used as cathode materials.
作者
岑程
李超
操家顺
秦淑敏
CEN Cheng1,2, LI Chao1,2, CAO Jiashun1,2, QIN Shumin3(1. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, China; 2. College of Environment, Hohai University, Nanjing 210098, China; 3. School of Mechanics and Materials, Hohai University, Nanjing 210098, Chin)
出处
《铸造技术》
CAS
2018年第3期680-682,686,共4页
Foundry Technology
关键词
阴极材料
Sn-Co合金
形貌
电化学性能
cathode materials
Sn-Co alloy
morphology
electrochemical performance
