Co（OH）2/Ni（OH）2复合电极材料制备及其超级电容性质  

Synthesis of Co（OH）2/Ni（OH）2 Composite Electrode Materials and Their Supercapacitor Performance

作　　者：年思宇 张燕 张国峰 秦攀 宋吉明 Nian Siyu;Zhang Yan;Zhang Guofeng;Qin Pan;Song Jiming(Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials,School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601)

机构地区：[1]安徽大学化学化工学院无机有机杂化功能材料化学安徽省重点实验室

出　　处：《化学通报》2019年第11期989-994,共6页Chemistry

基　　金：国家自然科学基金项目(21641007);安徽省教育厅重大项目(KJ2016SD63)资助

摘　　要：以Co(NO3)2·6H2O和Ni(NO3)2·6H2O为钴源和镍源,采用溶剂热法一步合成了Co(OH)2/Ni(OH)2复合材料,通过煅烧该复合材料可得到NiCo2O4。采用XRD、SEM、BET等对材料进行了表征,结果表明,Co(OH)2/Ni(OH)2复合材料是薄片组成的花状形貌,比表面积为37. 48m^2/g。电化学性能测试表明,Co(OH)2/Ni(OH)2复合材料比NiCo2O4具有更高的比电容值和容量保持率。在0. 5A/g的电流密度下,复合材料比电容值可达到1097. 8F/g,而NiCo2O4比电容值仅为86. 1F/g。因此,与煅烧后的NiCo2O4材料相比,Co(OH)2/Ni(OH)2复合材料具有更加优良的电化学性能,这为高性能超级电容器材料的制备提供了一个新思路。Co(OH)2/Ni( OH)2 composite materials were synthesized by solvothermal method using Co( NO3)2·6 H2 O and Ni( NO3)2·6 H2 O as cobalt and nickel sources,respectively. NiCo2O4 material could be obtained by calcining as-sgnthesized composite. The obtained materials were characterized by XRD,SEM and BET. The results showed that the Co( OH)2/Ni( OH)2 composite exhibits flower-like morphology with a specific surface area of 37. 48 m^2·g^-1. The tests of the electrochemical properties showed that the Co( OH)2/Ni( OH)2 composite materials have higher specific capacitance and capacity retention than those of NiCo2O4 material. At 0. 5 A·g^-1,its specific capacitance can reach 1097. 8 F·g^-1,while that of NiCo2O4 is only 86. 1 F·g^-1. Therefore, it has better electrochemical properties than the NiCo2O4 obtained by calcining,thus provides a new idea for preparing high performance supercapacitor materials.

关 键 词：Co(OH)2/Ni(OH)2复合材料 溶剂热合成 煅烧 超级电容器 电化学性能 

分 类 号：O6[理学—化学]