NiO-CuO纳米材料的制备及其电化学性能  

Preparation of NiO-CuO Nanometer Materials and Their Electrochemical Properties

作　　者：王建明 任治宇 蔡鹤铭 柴松林 林一清 熊飞兵 张宏怡 李刚[3] 程再军 Wang Jianming;Ren Zhiyu;Cai Heming;Chai Songlin;Lin Yiqing;Xiong Feibing;Zhang Hongyi;Li Gang;Cheng Zaijun(School of Optoelectronic and Communication Engineering,Xiamen University of Technology,Xiamen 361024,China;Fujian Key Laboratory of Optoelectronic Technology and Devices,Xiamen 361024,China;Institute of Energy Innovation,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024 [2]福建省光电技术与器件重点实验室,福建厦门361024 [3]太原理工大学能源革命研究院,太原030024

出　　处：《微纳电子技术》2022年第8期771-777,共7页Micronanoelectronic Technology

基　　金：福建省自然科学基金面上项目(2021J011215);厦门市青年创新项目(3502Z20206077);厦门理工学院科研攀登计划项目(XPDKT20011);厦门理工学院研究生科技创新项目(YKJCX2021098,YKJCX2021096,YKJCX2021104)。

摘　　要：过渡金属氧化物因具有丰富的氧化还原位点、高的理论容量等特性,常被用作超级电容器的电极材料。但是,单金属氧化物的导电性普遍较差,极大限制了其电化学性能。选用泡沫镍为基底,采用静电纺丝法制备出NiO纳米纤维,并通过掺杂氧化铜制备NiO-CuO双金属氧化物电极材料。实验结果表明:在2 mol/L KOH溶液中,当电流密度为0.5 A·g^(-1)时,NiO电极的质量比电容为202.8 F·g^(-1),5 000次循环充放电后电容保持率仅为30.28%。同等测试条件下,NiO-CuO电极的质量比电容高达410.4 F·g^(-1),电容保持率为60.48%。因而,合理构建双金属氧化物作为电极材料,可充分发挥两种过渡金属的协同效应,大幅提高电极材料导电性和稳定性,进而提升电化学性能。Transition metal oxides are often used as electrode materials for supercapacitors due to their distinctive properties such as abundant redox sites and high theoretical capacity. However, due to the disadvantage of poor electrical conductivity, the electrochemical performance of monometallic oxides was greatly limited. With nickel foam as the substrate, NiO nanofibers were prepared by electrospinning method, and NiO-CuO bimetallic oxide electrode materials were prepared by doping copper oxide. The experimental results show that in 2 mol/L KOH solution, the mass specific capacitance of the NiO electrode is 202.8 F·g^(-1)at a current density of 0.5 A·g^(-1), and the capacitance retention rate is only 30.28% after 5 000 cycles of charge and discharge. Under the same test conditions, the mass specific capacitance of the NiO-CuO electrode is 410.4 F·g^(-1), and the capacitance retention rate is 60.48%. Therefore, reasonable construction of the bimetallic oxide as electrode materials can give full play to the synergistic effect of the two transition metals, which greatly improves the conductivity and stability of electrode materials to improve the electrochemical performances.

关 键 词：超级电容器 静电纺丝 纳米材料 双金属氧化物 电极材料 

分 类 号：TB383[一般工业技术—材料科学与工程]