Ni3(HCOO)6/还原氧化石墨烯复合电极材料的制备及电容性能  

Preparation and Supercapacitance of Ni_3(HCOO)_6/Reduced Graphene Oxide Electrode Materials

作　　者：付蓉蓉[1] 罗民[1] 马永华[1] 杨顺[1] 

机构地区：[1]宁夏大学化学化工学院,能源化工国家重点实验室培育基地,银川750021

出　　处：《高等学校化学学报》2016年第8期1485-1490,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21561026,21361020)资助~~

摘　　要：以氧化石墨烯(GO)为前驱体,Ni(NO_3)_2·6H_2O为镍源,甲酸为配体,N,N-二甲基甲酰胺为溶剂,通过一步溶剂热法制备了Ni_3(HCOO)_6/rGO复合电极材料.研究结果表明,通过金属镍离子和配体在氧化石墨烯表面超分子自组装成核,形成了"三明治"式的夹心复合结构;不同的GO浓度对复合材料的物相结构、晶体尺寸大小、形貌及电化学性能有很大的影响;当GO的浓度为8 mg/m L时,在100℃下反应24 h得到的Ni_3(HCOO)_6/rGO复合材料在电解液为1 mol/L KOH,5 m V/s下比电容高达940 F/g,经过500次充放电循环后电容的保持率为96.28%.Ni3（ HCOO）6/rGO electrode materials with sandwich structure were obtained via a facile synergistic self-assembly solvothermal route. As a electrode material for supercapacitor,the composites exhibited large specific capacitance and good cycling stability. The rGO loading is important factors in determining the phase,morphology and electrochemical property of as-prepared Ni3（ HCOO）6/rGO composites. The optimum conditions were achieved as follows： the synthesis temperature of 100 ℃,reaction time of 24 h and 8 mg/m L of graphene oxide addition. Ni3（ HCOO）6/rGO composite delivered a large specific capacitance of 940 F/g at a scan rate of 5 m V/s in 1 mol/L KOH electrolyte. Also,it displayed good electrochemical stability with96. 28% of the initial capacitance over consecutive 500 cycles at 4 A/g.

关 键 词：Ni3(HCOO)6/还原氧化石墨烯复合材料 超级电容器 超分子自组装 溶剂热法 

分 类 号：O646.5[理学—物理化学]