β-Ni(OH)_2/石墨烯复合纳米材料的制备及其电化学性能研究  

Preparation of β-Ni(OH)_2/graphene oxide and its electrochemical behavior

作　　者：李丽[1] 张来苹[1] Li Li Zhang Laiping(College of Chemistry and Chemical Engineering of Xinxiang University,Xinxiang 45300)

机构地区：[1]新乡学院化学化工学院,新乡453003

出　　处：《化工新型材料》2016年第12期43-45,共3页New Chemical Materials

基　　金：河南省重点科技攻关项目(122102210406)

摘　　要：以NaBH4为还原剂,采用成核晶化隔离法和氧化还原法相结合低温下制备了Ni（OH）_2/石墨烯纳米复合材料,并以此为电极研究了其电化学性能。实验发现：六方形片状结构的β-Ni（OH）_2成功地分散在石墨烯载体表面,石墨烯片层结构没有发生团聚及严重的堆垛现象,提高了电极的稳定性。当石墨烯与Ni（OH）_2的质量比为5∶5时,显示了最佳的电化学性能：在0~0.47V的电位窗口,1A/g的电流密度下,比电容高达922F/g。Nanocomposites of Ni（OH）2/grapheme（G） were prepared with a new method involving separate nuclea- tion and aging steps in a colloid mill with NaBH4 as the reducing agent,followed by a slow oxidation process at 90℃. As a result, the aggregation of grapheme and β-Ni（OH） 2 hexagonal nanoplates was efficiently prevented and the stability of com- posites was improved. The electrochemical behavior of β-Ni（OH）2/G was further investigated as electrode materials for supercapaeitors. We find that when the mass ratio of grapheme to Ni（OH）2 was 5：5, the composites achieved the best electrochemical behavior（optimal specific capacitance of 922F/g was achieved in a voltage window of a 0~0.47V,at current density of 1A/g）.

关 键 词：超级电容器 Β-NI(OH)2 石墨烯 成核晶化隔离法 

分 类 号：TQ127.11[化学工程—无机化工] TB332[一般工业技术—材料科学与工程]