| 纳米非晶态Ni(OH)_2电极材料的稀土掺杂改性研究 |
| |
| 引用本文： | 刘长久,谷得龙,孙丹,吴华斌. 纳米非晶态Ni(OH)_2电极材料的稀土掺杂改性研究[J]. 微细加工技术, 2008, 0(2) |
| |
| 作者姓名： | 刘长久 谷得龙 孙丹 吴华斌 |
| |
| 作者单位： | 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,材料与化学工程系,广西桂林,541004 |
| |
| 基金项目： | 广西科学研究与技术开发计划项目 |
| |
| 摘 要： | 为了提高镍基二次电池正极材料的电化学性能,采用微乳液快速冷冻沉淀法制备出稀土Ce掺杂纳米级非晶态氢氧化镍粉体材料.采用Raman,XRD,SEM和TEM对其结构形态进行了表征分析,采用交流阻抗谱(EIS)和充放电性能对其电化学性能进行了测试.结果发现,掺入适量的Ce可以进一步增强纳米非晶态氢氧化镍的无序性并且使颗粒细化,进而使其电化学反应的电荷转移电阻降低,电化学活性明显增强.样品作为MH-Ni电池正极材料以0.2 C充放电,终止电压为1.0 V,当掺杂Ce的质量分数为4%时,其放电比容量达到336.7 mAh/g,这明显高于晶态β-氢氧化镍电极材料289 mAh/g的理论容量,说明纳米非晶态氢氧化镍作为高活性电极材料具有很好的应用前景.
|
| 关 键 词： | 微乳液快速冷冻沉淀法 稀土Ce掺杂 纳米非晶态氢氧化镍 |
Study on Doping Rare Earth Modification of Nano-sized Amorphous Ni(OH)_2 Electrode Materials |
| |
| LIU Chang-jiu,GU De-long,SUN Dan,WU Hua-bin. Study on Doping Rare Earth Modification of Nano-sized Amorphous Ni(OH)_2 Electrode Materials[J]. Microfabrication Technology, 2008, 0(2) |
| |
| Authors: | LIU Chang-jiu GU De-long SUN Dan WU Hua-bin |
| |
| Affiliation: | LIU Chang-jiu,GU De-long,SUN Dan,WU Hua-bin (Key Laboratory of Nonferrous Metals , Materials Processing New Technology Ministry of Education,Department of Material , Chemistry Engineering,Guilin University of Technology,Guilin 541004,China) |
| |
| Abstract: | To improve the electrochemical performance of the positive material of nickel-based secondary batteries,rare earth Ce-doped amorphous nano-sized nickel hydroxide powder was prepared by rapid freezing micro-emulsion precipitation method.The structural properties of the material were characterized by Raman,XRD,SEM,TEM.The results demonstrated that the doping of Ce increases the structural disorder decreases the particle size and the electron transfer resistance,which accordingly improves the electrochemical p... |
| |
| Keywords: | rapid freezing precipitation of micro-emulsion doping rare earth Ce nano-sized amorphous nickel hydroxide |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
