锌基准固态电池磷化钴镍电极的制备与性能  

Preparation and Performance of Cobalt-Nickel Phosphide Electrode for Zinc-Based Quasi-Solid-State Battery

作　　者：付天宇 童新[1] 熊大元[1,2] 徐少辉[1] 王连卫[1] Fu Tianyu;Tong Xin;Xiong Dayuan;Xu Shaohui;Wang Lianwei(Key Laboratory of Polarized Materials and Devices of Ministry of Education,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China;Shanghai Key Laboratory of Multidimensional Information Processing,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China)

机构地区：[1]华东师范大学物理与电子科学学院极化材料与器件教育部重点实验室,上海200241 [2]华东师范大学物理与电子科学学院上海市多维度信息处理重点实验室,上海200241

出　　处：《微纳电子技术》2022年第4期356-364,共9页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(61774060);上海市科学技术委员会资助项目(18DZ2270800)。

摘　　要：通过一步水热法在泡沫镍衬底上生长出双金属镍钴磷化物,研究了不同水热溶液浓度对于磷化物表面形貌的影响。使用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)对制备的磷化物样品的微观结构和元素组成进行分析;使用电化学工作站对样品进行循环伏安(CV)测试和恒电流充放电(GCD)测试。研究发现,电化学性能最好的磷化钴镍电极表面形貌为花状纳米片结构。使用该电极封装的锌基准固态电池在50 mA·cm^(-2)的电流密度下有0.9 mA·h·cm^(-2)的面积容量,并且在2 000次循环后(电流密度为80 mA·cm^(-2))容量保持率仍有95%。该电池不仅有良好的大电流充放电能力,还有优异的长循环稳定性,本研究结果为磷化物应用于柔性锌基电池应用提供了新的思路。The bimetallic nickel cobalt phosphide was grown on the nickel foam substrate by one-step hydrothermal method, and the influences of different concentrations of hydrothermal solution on the surface morphology of the phosphide were investigated. The X-ray diffractometer(XRD), scanning electron microscope(SEM) and X-ray photoelectron spectroscope(XPS) were used to analyze the microstructure and elemental composition of the prepared phosphide samples. Cyclic voltammetry(CV) test and constant current charge/discharge(GCD) test of samples were carried out on the electrochemistry workstation. It is found that the cobalt-nickel phosphide electrode with the flower-like nanosheet structure has the best electrochemical performance. The zinc-based quasi-solid-state battery encapsulated with the electrode has an areal capacity of 0.9 mA·h·cm^(-2)at a current density of 50 mA·cm^(-2), and the capacity retention ratio still remains 95% after 2 000 cycles(at a current density of 80 mA·cm^(-2)). The battery shows good high-current charging and discharging capability, and exhibits excellent long-cycle stability. The research results provide a new idea for phosphide in flexible zinc-based battery applications.

关 键 词：一步水热法 纳米结构 磷化物 准固态电池 锌基电池 

分 类 号：TM911[电气工程—电力电子与电力传动]