复合掺杂PO_4^(3-)和Al^(3+)的α-Ni(OH)_2电极材料稳定性能研究(英文)  

Structure and Stability Investigations of α-Ni(OH)_2 Codoped with Al^(3+) and PO_4^(3-)as Anode Material

作　　者：刘长久[1] 刘爱芳[1] 宋莎[1] 

机构地区：[1]桂林工学院有色金属及材料加工新技术教育部重点实验室,广西桂林541004

出　　处：《稀有金属材料与工程》2009年第A01期169-172,共4页Rare Metal Materials and Engineering

基　　金：Supported by Guangxi Scientific Research and Technology Development Projects (0731001)

摘　　要：采用化学反应共沉淀法制备出PO43-和Al3+阴阳离子复合掺杂的α-Ni(OH)2粉体,采用X射线衍射仪(XRD),电子能谱(EDS),红外光谱(IR)和热重分析技术(TG-DSC)表征了其结构和组成。结果表明:添加PO43-和Al3+离子的α-Ni(OH)2增加了层间距,充放电循环测试表明复合掺杂的α-Ni(OH)2在15次循环结束后没有发生相变,循环伏安曲线呈现较好的重现性,表明了复合掺杂的α-Ni(OH)2在碱性电解液中具有较高的结构稳定性,放电容量达348.51mA/g。In this paper, α-Ni（OH）2 powder codoped with Al^3＋ and PO43 was prepared by chemical coprecipitation method. The structure and composition of the doped α-Ni（OH）2 were analyzed by X-ray diffraction （XRD）, electron energy spectrum （EDS）, IR spectroscopy, and thermal gravity-differential scanning calorimetry （TG-DSC） techniques. The results demonstrate that the addition of Al^3＋ and PO4^3- increases the layer distance of a-Ni（OH）2. Moreover, the Al^3＋ and PO4^3- doping results in more water molecules contained in α-Ni（OH）2. Charge-discharge cycling measurements show that there is no phase transformation for the Al^3＋ and PO4^3- codoped α-Ni（OH）2 after 15 cycles and the charge-ischarge curves exhibit good reproducibility after 30 cycles, indicating the high structural stability of the codoped α-Ni（OH）2 in alkaline electrolyte. The capacity of this codoped α-Ni（OH）2 is up to 348.51 mAh·g^-1.

关 键 词：角板材料 Α-NI(OH)2 复合掺杂 结构性能 稳定性 

分 类 号：TM910.4[电气工程—电力电子与电力传动]