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（英文）  

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

作　　者：荆鑫[1,2] 张旭 王玮[1] 郎俊伟[2,3] JING Xin;ZHANG Xu;WANG Wei;LANG Jun-wei(School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,Shandong,P.R.China;Qingdao Center of Resource Chemistry ＆ New Materials,Qingdao 266000,Shandong,P.R.China;Laboratory of Clean Energy Chemistry and Materials,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,Gansu,P.R.China)

机构地区：[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

出　　处：《电化学》2018年第4期332-343,共12页Journal of Electrochemistry

基　　金：supported by the 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：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RuO_2(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、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(121Wh·L-1)的优良性能,在1.4 V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%.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 Ru1.69 g·cm3）and Co-Ni oxide（nanoflakes,2.14 g·cm3）,the Ruoxide 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·cm3）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 of1.4 V at a current density of 2 A·g-1 in life cycle test,indicating high electrochemical stability.

关 键 词：金属氧化物 Co-Ni氧化物纳片 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 

分 类 号：O646[理学—物理化学]