镍表面修饰活性炭的电容性能  

Capacitance performance of nickel surface modified activated carbon

作　　者：方华[1,2] 孟浩阳 丰小华 王力臻 FANG Hua;MENG Hao-yang;FENG Xiao-hua;WANG Li-zhen(School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou.,Henna 450002,China;Henan Provincial Key Laboratory of Surface Interface Science,Zhengzhou,Henan 450001,China)

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002 [2]河南省表界面科学重点实验室,河南郑州450002

出　　处：《电池》2018年第6期373-376,共4页Battery Bimonthly

基　　金：国家自然科学基金(U1504204;21471135)

摘　　要：采用多元醇还原法制备镍修饰活性炭(NAC)。用XRD、SEM、电感耦合等离子体质谱(ICP-MS)与接触角测试,对NAC进行物理性能研究;用恒流充放电、循环伏安与交流阻抗测试,对NAC进行电化学电容性能分析。镍在活性炭(AC)表面分布均匀,镍表面修饰增强了NAC电极的亲液能力。在0. 05～1. 00 V进行充放电,NAC的比电容在电流为0. 2 A/g和5. 0 A/g时分别达到312 F/g与180 F/g,比AC分别提高了158. 7%和115. 6%。以0. 2 A/g的电流循环2 000次,NAC的比电容为261 F/g,比AC提高了136. 5%。NAC电极的等效串联电阻由AC的1. 01Ω降低至0. 84Ω。A nickel modified activated carbon (NAC)was fabricated by polyol reduction process.The physical property of NAC was characterized by means of XRD,SEM,inductively coupled plasma mass spectrometry (ICP-MS)and contact angle tests.Electrochemical capacitive performance was investigated by galvanostatic charge/diseharge,cyclic voltammetry and A.C. impedance methods.Nickel was uniformly distributed on the surface of activated carbon (AC).The hydrophilicity of NAC electrode was enhanced by nickel surface modified.The specific cppacitance of NAC reached 312 F/g and 180F/g at the current of 0.2A/g and 5.0 A/g in 0.05 -1.00 V,respectively,which was 158.7% and 115.6%higher than AC.After 2000 cycles at the current of 0.2 A/g,the specific capacitance of NAC still reached 261F/g,which was 136.5 %higher than AC.Compared with AC,the equivalent series resistance of the NAC electrode was reduced from 1.01Ωto 0.84Ω.

关 键 词：活性炭 镍 多元醇还原法 表面修饰 超级电容器 

分 类 号：TM533[电气工程—电器]