一步水热法制备氢氧化镍-石墨烯复合材料及其电化学性能(英文)  

Assembly of Ni(OH)_2-graphene hybrids with a high electrochemical performance by a one-pot hydrothermal method

作　　者：袁博[1] 郑晓雨[1] 张辰[1] 吕伟[2] 李宝华[2] 杨全红[1,2] 

机构地区：[1]天津大学化工学院,天津300072 [2]清华大学深圳研究生院炭功能材料工程实验室,广东深圳518055

出　　处：《新型炭材料》2014年第6期426-431,共6页New Carbon Materials

基　　金：National Basic Research Program of China(2014CB932403);National Science Foundation of China(51302146);NSAF(U1330123);Shenzhen Basic Research Project(JCYJ20130402145002430);China Postdoctoral Science Foundation(2012M520012,2013T60111);Guangdong Province Innovation R&D Team Plan(2009010025);ZDSYS(20140509172959981)~~

摘　　要：通过一步水热法制备出具有三维网络结构的氢氧化镍-石墨烯复合材料(Ni(OH)2-GS)。这一独特的结构可以提供良好的离子传输通道,同时可以有效地提高氢氧化镍与电解液的接触面积和材料的导电性。结果表明,Ni(OH)2的质量分数为84%时,复合材料具有最佳的电化学性能,在5 m V·s-1的扫速下比电容为1 461 F·g-1,在100 m V·s-1的扫速下比电容为682 F·g-1(容量保持率为47%),并且具有良好的循环稳定性。A Ni （OH）2-graphenehybrid with a three dimensional （3D） interconnected graphene network was prepared by a simple one-pot hydrothermal method. The 3D structure constructed of flexible and planar graphene sheets （GS） forms an effective electron transfer network and provides a continuous pore structure for ion transport. Moreover, this structure avoids the aggregation of GS and Ni （OH）2, resulting in a high utilization rate of Ni （OH）2 at high contents. This study shows the hybrid has a high rate capabili- ty and cyclic stability and exhibits a high specific capacitance of - 1 461 F·g^-1 at a scan rate of 5 mV·s^-1 with a Ni （OH）2 mass loading of -84 mass%.

关 键 词：超级电容器 氢氧化镍 石墨烯 三维网络结构 

分 类 号：TB332[一般工业技术—材料科学与工程]