微型超级电容器PPy/GO-RuO2复合膜电极的制备与电化学性能

doi:10.15541/jim20140500

无机材料学报 ›› 2015, Vol. 30 ›› Issue (5): 505-510.DOI: 10.15541/jim20140500 CSTR: 32189.14.10.15541/jim20140500

微型超级电容器PPy/GO-RuO₂复合膜电极的制备与电化学性能

朱平^1,2, 蔡婷^1,2, 韩高义³, 熊继军^1,2

(1. 中北大学电子测试技术重点实验室, 太原 030051; 2. 中北大学仪器与电子学院, 太原 030051; 3. 山西大学分子科学研究所, 太原 030006)

收稿日期:2014-09-29 修回日期:2015-01-25 出版日期:2015-05-20 网络出版日期:2015-04-28
基金资助:
山西省自然科学基金(2012011010-2)

Preparation and Electrochemical Performance of PPy/GO-RuO₂ Film Electrode for Micro-supercapacitor

ZHU Ping^1,2, CAI Ting^1,2, HAN Gao-Yi³, XIONG Ji-Jun^1,2

(1. Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China; 2. North University of China, School Instrument and Electronics, Taiyuan 030051, China; 3. Shanxi Laboratory for Molecular Sciences, Shanxi University, Taiyuan 030006, China)

Received:2014-09-29 Revised:2015-01-25 Published:2015-05-20 Online:2015-04-28
Supported by:
Natural Science Foundation of Shanxi Province(2012011010-2)

摘要/Abstract

摘要：

为了解决氧化钌(RuO₂)沉积电位过高, 难以在三维微结构金属集流体上直接沉积的问题, 提出采用分步电沉积方法在微三维结构镍(Ni)集流体上制备RuO₂复合膜电极, 即先在三维微结构Ni集流体上沉积聚吡咯/氧化石墨烯(PPy/GO)薄膜作为基底, 经热处理后, 在基底上二次沉积出RuO₂颗粒, 最后再对RuO₂复合薄膜进行二次热处理。扫描电子显微镜(SEM)观察显示, 随着热处理温度的升高, 薄膜表面多孔结构增多, 达到了提高膜电极结构孔隙分布的目的。能量分散谱(EDS)和X射线光电子能谱分析(XPS)表明, 薄膜中无定形RuO₂·xH₂O的存在保证了膜电极的大比容量。电化学性能测试结果表明, 经105℃处理后的膜电极电化学性能最佳, 比电容为28.5 mF/cm², 能量密度为0.04 Wh/m², 功率密度为14.25 W/m²。采用分步电沉积方法制备出的RuO₂复合薄膜是一种良好的MEMS超级电容器电极材料。

null

关键词: RuO₂复合薄膜, 分步电沉积, 热处理, MEMS超级电容器

Abstract:

To address the issue that RuO₂ was difficult to deposit directly on the micro-3D-structure metal current collector due to its high deposition potential, this study was engaged to prepare RuO₂ composite film by the fractional electro-deposition method. PPy/GO film was firstly deposited on nickel current collector as substrate, then RuO₂ particles were deposited on the substrate after heat-treatment, finally the RuO₂ composite film was carried on a second heat-treatment. By means of scanning electron microscope (SEM), it can be found that the porous structures of RuO₂ composite film multiply with the increase of heat-treatment temperature, so that the pore structure of the membrane electrode is improved. By means of X-ray energy dispersive spectroscope (EDS) and X-ray photoelectron spectroscope (XPS), the results indicate that there exists amorphous RuO₂·xH₂O in the film, which ensures the great specific capacity of the membrane electrode. The electrochemical testing results indicate that the electrochemical performance of membrane electrode is optimal when heat-treatment temperature reaches 105℃, with specific capacitance of 28.5 mF/cm², energy density of 0.04 Wh/m² and power density of 14.25 W/m². The RuO₂ composite film prepared by using step-by-step electro-deposition method is a type of excellent electrode material for micro-supercapacitor.

Key words: RuO₂ composite films, step-by-step electro-deposition, heat treatment, micro-supercapacitor

中图分类号:

TQ174

朱平, 蔡婷, 韩高义, 熊继军. 微型超级电容器PPy/GO-RuO₂复合膜电极的制备与电化学性能[J]. 无机材料学报, 2015, 30(5): 505-510.

ZHU Ping, CAI Ting, HAN Gao-Yi, XIONG Ji-Jun. Preparation and Electrochemical Performance of PPy/GO-RuO₂ Film Electrode for Micro-supercapacitor[J]. Journal of Inorganic Materials, 2015, 30(5): 505-510.

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微型超级电容器PPy/GO-RuO₂复合膜电极的制备与电化学性能

Preparation and Electrochemical Performance of PPy/GO-RuO₂ Film Electrode for Micro-supercapacitor

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