杂质离子对非晶态水合氧化钌电化学超电容性能的影响

材料研究学报

2009, Vol. 23

Issue (6): 628-634

研究论文

本期目录 | 过刊浏览

杂质离子对非晶态水合氧化钌电化学超电容性能的影响

武彩霞¹; 刘罡²; 方海涛²; 李峰³; 史鹏飞¹

1.哈尔滨工业大学化工学院哈尔滨 150001
2.哈尔滨工业大学材料科学与工程学院哈尔滨 150001
3.中国科学院金属研究所~沈阳材料科学国家(联合)实验室沈阳 110016

Effect of impurity ions on electrochemical super-capacitive properties of amorphous hydrated ruthenium oxide

WU Caixia¹; LIU Gang²; FANG Haitao²; LI Feng³; SHI Pengfei¹

1.School of Chemical Engineering and Technology; Harbin Institute of Technology; Harbin 150001
2.School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001
3.Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016

引用本文:

武彩霞刘罡方海涛李峰史鹏飞. 杂质离子对非晶态水合氧化钌电化学超电容性能的影响[J]. 材料研究学报, 2009, 23(6): 628-634.
, , , , , , . Effect of impurity ions on electrochemical super-capacitive properties of amorphous hydrated ruthenium oxide[J]. Chin J Mater Res, 2009, 23(6): 628-634.

全文: PDF(1341 KB)

摘要:

采用化学沉淀法(在RuCl₃溶液中滴加NaOH)制备非晶态水合氧化钌, 用去离子水对非晶态水合氧化钌沉淀充分洗涤, 获得了Na、Cl杂质含量不同、而非晶态结构、水含量和显微相貌都相同的两种氧化钌样品. X射线光电子能谱分析表明, 样品中的Na和Cl杂质分别以水合Na⁺、水合Cl^-的形式存在. 去离子水充分洗涤5次的样品(W_5)与不充分洗涤1次的样品(W_1)相比, 前者的Na⁺、Cl^-杂质含量低. 循环伏安测试表明, W_5的比电容和功率性能都优于W_1. Na⁺、Cl^-杂质不仅降低了氧化钌的比电容, 也降低了氧化钌的功率性能. 在非晶态水合氧化钌的制备过程中杂质含量的控制对获得高超电容性能十分重要.文中还分析了Na⁺、Cl^-杂质对电容性能不利影响的机理.

关键词 ：无机非金属材料 , 材料物理与化学 , 超级电容器 , X射线光电子能谱 , 氧化钌

Abstract：

Amorphous hydrous ruthenium oxide was prepared by a chemical precipitation method. Two ruthenium oxide samples with different contents of Na and Cl impurities were obtained by changing the number of times for washing sediments with distilled water. The experiment results showed that the Na and Cl impurities exist as hydrated Na⁺ and hydrated Cl⁻, respectively. Sample W 5 (sufficiently
washed 5 times with distilled water during its preparation) has lower content of Na⁺ and Cl+ impurities in comparison with sample W 1 (insufficiently washed once with distilled water during its preparation). Cyclic voltammetric measurements indicate that the specific capacitance and power performance of W 5 are all higher than that of W 1. Hydrated Na⁺ and Cl⁻ impurities not only decrease the specific capacitance of ruthenium oxide, but degrade the power performance. The reason for the deleterious effect of hydrated Na⁺ and Cl⁻impurities on the super-capacitive properties is discussed.

Key words： inorganic non-metallic materials material physics and chemistry supercapacitor X–ray photoelectron spectra ruthenium oxide

收稿日期: 2009-05-27

ZTFLH:

O614

基金资助:

国家自然科学基金50872026和50602011资助项目.

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