氧化锌表面包覆Sn_6O_4(OH)_4的制备及其在锌镍电池中的应用  

Sn_6O_4(OH)_4 Coated on ZnO Surface: Preparation and Application in Zinc-Nickel Secondary Battery

作　　者：俞双林 俞小花[1] 吕祥[1] 王迎[1] 冯攀[1] 别汉波 谢刚[1,2] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]共伴生有色金属资源加压湿法冶金技术国家重点实验室,昆明650500

出　　处：《无机化学学报》2017年第9期1573-1578,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金面上项目(No.51774160)

摘　　要：采用水热-共沉淀法在氧化锌表面包覆锡化合物,利用扫描电子显微镜(SEM)、X射线衍射(XRD)和能谱分析(EDS)对制备的包覆ZnO材料进行表征。结果表明:XRD表明附着在氧化锌表面的是Sn_6O_4(OH)_4,且结晶度较好;SEM测试显示在p H=12条件下,Sn_6O_4(OH)_4能够很好地附着在氧化锌颗粒表面;EDS显示组成物中的元素包含Zn、Sn、O三种元素。利用循环伏安曲线(CV)、电化学阻抗谱(EIS)、倍率充放电技术对包覆ZnO材料进行了电化学性能的测试,结果表明:包覆Sn_6O_4(OH)_4的ZnO可以提高锌负极的耐蚀性能,增大电荷转移电阻(Rct);锌电极覆Sn_6O_4(OH)_4量为3%时充放电效率最佳,在0.2C充放循环40次后充放电循环保持率仍有70%。The hydrothermal-coprecipitation method was successfully used to prepare Sn604（OH）4 coated on the surface of zinc oxide. The modified ZnO material was characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and energy dispersive spectrometer （EDS） analysis. The results show： SnrO4（OH）4 was coated on the surface of ZnO and the crystallinity was well at pH=12, and the coating composition is including Zn, Sn, O. The electrochemical performances of Sn604 （OH）4-coated ZnO was investigated by cyclic voltammetry （CV）, electro-chemical impedance spectroscopy （EIS） and charge-discharge technology. Compared with pure ZnO, The CV curves and the electrochemical impedance spectroscopy show that Sn6Oa（OH）4-coated ZnO can improve the corrosion resistance and increase charge transfer resistance （Rct）, Sn604（OH）4-coated ZnO electrode has best charge-discharge efficiency when the Sn604（OH）4 content is 3%, and the capacity retention ratio of the coated ZnO is about 70% after over 40 cycles with the rate of 0.2C, which is much higher than that of the pure ZnO.

关 键 词：氧化锌 水热一共沉淀法 包覆锡 电化学性能 

分 类 号：O614.241[理学—无机化学]