兼具高质量和高体积能量密度的水系全金属氧化物不对称超级电容器

doi:10.13208/j.electrochem.180204

电化学（中英文） ›› 2018, Vol. 24 ›› Issue (4): 332-343. doi: 10.13208/j.electrochem.180204

兼具高质量和高体积能量密度的水系全金属氧化物不对称超级电容器

荆鑫^1,2，张旭³，王玮^1*，郎俊伟^2,3*

1.中国海洋大学材料科学与工程学院，山东青岛，266100； 2.青岛市资源化学与新材料研究中心，山东青岛，266000； 3.中国科学院兰州化学物理研究所，清洁能源化学与材料实验室，甘肃兰州，730000

收稿日期:2018-02-04 修回日期:2018-03-26 出版日期:2018-08-28 发布日期:2018-04-18
通讯作者: 王玮，郎俊伟 E-mail: clwang@ouc.edu.cn; jwlang@licp.cas.cn
基金资助:
国家自然科学基金（No. 21673263, No.51572247）,山东省自然科学基金（No. ZR2014EMM003），青岛市自主创新计划基金（No.16-5-1-42-jch）

An Aqueous All-Metal Oxide Asymmetric Supercapacitor with High Gravimetric and Volumetric Energy Densities

JING Xin^1,2, ZHANG Xu³, WANG Wei^1*, LANG Jun-wei^2,3*

1. School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, Shandong, P. R. China; 2. Qingdao Center of Resource Chemistry & New Materials, Qingdao 266000, P.R. China; 3. Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China

Received:2018-02-04 Revised:2018-03-26 Published:2018-08-28 Online:2018-04-18
Contact: WANG Wei, LANG Jun-wei E-mail: clwang@ouc.edu.cn; jwlang@licp.cas.cn
Supported by:
National Nature Science Foundations of China (Grant No. 21673263, and 51572247); the Shandong Province Natural Science Foundation (Grant No. ZR2014EMM003);the Independent Innovation Plan Foundations of Qingdao City of China (Grant No. 16-5-1-42-jch).

摘要/Abstract

摘要：

超级电容器只有兼具高质量和高体积能量密度才能拥有更广泛的应用价值.本文采用具有纳米结构及高填充密度的RuO₂（纳米球，1.69 g·cm^-3）和Co-Ni氧化物（纳米片，2.14 g·cm^-3）分别作为负极和正极材料，成功地构筑了RuO₂ // KOH / / Co-Ni氧化物非对称超级电容器.所得不对称超级电容器具有高电压窗口（0~1.5V）、高质量比容量（217.5 F·g^-1）和高体积比容量（412.3 F·cm^-3）、高质量能量密度（61.8 Wh·kg^-1）和高体积能量密度（121 Wh·L^-1）的优良性能，在1.4V的电压下以2 A·g^-1的电流密度历经5000次循环后比容量保持率为87％.

关键词: 金属氧化物, Co-Ni 氧化物纳z米片, RuO₂纳米球, 高质量和高体积能量密度, 水系不对称超级电容器

Abstract:

Only with both high gravimetric and high volumetric energy densities, can supercapacitors find more extensive applications.In this paper, by making good use of the interesting nanostructures and the high packing densities of RuO₂ (nanoshpheres,1.69 g·cm^-3) and Co-Ni oxide (nanoflakes, 2.14 g·cm^-3), the RuO₂//KOH//Co-Ni oxide all-metal oxide asymmetric supercapacitors with high performance were successfully fabricated, which led to the maximum specific capacitance of 217.5 F·g^-1 (412.3 F·cm^-3) and specific energy density of 61.8 Wh·kg^-1 (121 Wh·L^-1) in a cell voltage between 0 and 1.5 V in KOH electrolyte. In addition, the constructed supercapacitor device could retain 87% of the initial specific capacitance even at 5000th cycle with the cell voltage of 1.4 V at a current density of 2 A·g^-1 in life cycle test, indicating high electrochemical stability.

Key words: metal oxide, Co-Ni oxide nanoflakes, RuO₂ nanoshpheres, high gravimetric and volumetric energy density, aqueous asymmetric supercapacitors

中图分类号:

O646

荆鑫，张旭，王玮，郎俊伟. 兼具高质量和高体积能量密度的水系全金属氧化物不对称超级电容器[J]. 电化学（中英文）, 2018, 24(4): 332-343.

JING Xin, ZHANG Xu, WANG Wei, LANG Jun-wei. An Aqueous All-Metal Oxide Asymmetric Supercapacitor with High Gravimetric and Volumetric Energy Densities[J]. Journal of Electrochemistry, 2018, 24(4): 332-343.

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兼具高质量和高体积能量密度的水系全金属氧化物不对称超级电容器

An Aqueous All-Metal Oxide Asymmetric Supercapacitor with High Gravimetric and Volumetric Energy Densities

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