摘要
应用经过改进的化学镀工艺,即:采用硼氢化钠、次磷酸钠同时作为还原剂,结合锡的碱性歧化反应,分别在铜箔及泡沫铜上制备Sn-Zn-Ni三元合金镀层。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线能量衍射谱(EDS)分析镀层的结构与组成。结果表明:镀层中含有锡、锌、镍三种元素;优化沉积条件,镀层中锌的质量分数可达25%。采用三维多孔泡沫铜为基体,制备化学镀层并对其进行水热葡萄糖碳包覆处理。作为锂离子电池阳极材料,充放电循环10周,放电容量仍可保持在400 mA·h·g^(-1)以上。
Sn-Zn-Ni ternary alloy film was prepared on copper foil and foam copper respectively by a modified electroless plating process, which used both of sodium borohydride and sodium hypophosphite as reducing agents and was combined with alkaline tin disproportionating reaction. X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and energy dispersive X-ray spectrometry （EDS） were used to characterize the phases, morphology and composition of the films respectively on both copper foil and copper foam. The EDS results show that the elements,such as Sn, Zn and Ni can be found in the coating. By optimizing, the mass fraction of zinc in the coating can reach 25%. A three-dimensional porous foam copper used as substrate to deposit Sn-Zn-Ni ternary alloy film, and then the film is coated with glucose-derived carbon-rich polysaccharide by a hydrothermal approach. When it is used as anode materials in lithium ion batteries, the reversible lithium storage capacity of more than 400 mA ·h· g^-1 can be after 10 cycles.
出处
《电镀与环保》
CAS
CSCD
北大核心
2012年第1期32-36,共5页
Electroplating & Pollution Control
基金
纳米复合能源材料制备
表征及其在锂二次电池中应用的关键基础研究(国家973项目
2007CB936500)
关键词
化学镀
锡-锌-镍合金
锂离子电池
水热反应
electroless plating
Sn-Zn-Ni alloy
lithium ion battery
hydrothermal approach
