还原剂对Ni(OH)2/还原氧化石墨烯复合材料结构及电化学性能的影响

复合材料学报, 2016, 33(11): 2618-2624. doi: 10.13801/j.cnki.fhclxb.20151223.002

还原剂对Ni(OH)2/还原氧化石墨烯复合材料结构及电化学性能的影响

赫文秀 ^1, , 李兴盛 ^2, , 张永强 ^3, , 孟晶 ^4, , 于慧颖 ^5, , 樊晶晶 ^6,

1.内蒙古科技大学化学与化工学院,包头,014010

2.内蒙古科技大学化学与化工学院,包头,014010

3.内蒙古科技大学化学与化工学院,包头,014010

4.内蒙古科技大学化学与化工学院,包头,014010

5.内蒙古科技大学化学与化工学院,包头,014010

6.内蒙古科技大学化学与化工学院,包头,014010

基金项目: 内蒙古自然科学基金(2014MS0523,2015MS0208) 内蒙古青年科技英才计划(NJYT-14-A08) 包头市科技计划(2014Z1010-2,2015C2004-1) 内蒙古自治区应用技术研究与开发资金(20140185)

关键词： β-Ni(OH)2 , 还原氧化石墨烯 , 还原剂 , 电化学性能 , 水热合成

Effects of reductants on structures and electrochemical performances of Ni(OH)2/reduced graphene oxide composites

Keywords： β-Ni(OH) 2 , reduced graphene oxide , reductant , electrochemical performances , hydrothermal synthesis

为研究还原剂对Ni(OH)2/还原氧化石墨烯(RGO)复合材料结构及电化学性能的影响,首先以氧化石墨烯(GO)和硝酸镍作前驱体,采用水热法制备了Ni(OH)2/RGO复合材料;然后,利用XRD、SEM和Raman光谱仪表征了复合材料的结构和形貌,并采用循环伏安法、恒流充放电曲线和电化学阻抗谱研究了复合材料的电化学性能.结果表明:以(NH2)2CSO2作还原剂时,制备的β-Ni (OH) 2/RGO复合材料为RGO纳米片与Ni(OH)2纳米片相互插层的结构;在电解液(6 mol/L KOH溶液)中,0.2C放电倍率时β-Ni(OH) 2/RGO复合材料的比容量高达341.0 mAh/g,10.0C放电倍率为时复合材料的比容量为242.2 mAh/g,仍能保持β-Ni(OH)2理论比容量的83.8％.所得结论表明制备的Ni(OH)2/RGO复合材料显现出良好的电化学性能.

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