摘要
采用水浴法以铜丝为基底原位制备CuO纳米片,再在其上电沉积聚吡咯(PPy)纳米颗粒,得到片状与颗粒相结合的Cu/CuO/PPy复合材料。以最佳条件制备出的Cu/CuO/PPy在0.2 mA/cm^(2)电流密度下比容量为108.2 mF/cm^(2),约为Cu/CuO的两倍。以Cu/CuO/PPy为正极、碳纤维(CF)为负极组装成非对称超级电容器(Cu/CuO/PPy//CF),在6.67 mW/cm^(3)的功率密度下,能量密度为0.12 mWh/cm^(3);经过1000次的充放电后,其电容保持率为87.6%。3个超级电容器串联可点亮一个蓝色LED灯,表现出良好的电化学性能。此外,Cu/CuO/PPy//CF在不同的弯曲状态下的比电容都能保持平直状态下的98.5%以上,具有良好的柔韧性能。
With the birth of micro-flexible devices,one-dimensional wire-shape supercapacitors with small size are gaining widespread attention.In this work,Cu/CuO nanosheets are prepared in situ on copper wire substrate by the water bath method,then polypyrrole(PPy)nanoparticles are electrodeposited on Cu/CuO nanosheets,resulting in Cu/CuO/PPy composites with a combination of nanosheets and nanoparticles.It is found that the specific capacitance of Cu/CuO/PPy synthesized under optimum condition is 108.2 mF/cm^(2) at 0.2 mA/cm^(2),which is twice as high as Cu/CuO.The asymmetric supercapacitor of Cu/CuO/PPy//CF is assembled with Cu/CuO/PPy as the positive electrode and carbon fibres(CF)as the negative electrode.The energy density is 0.12 mWh/cm^(3) at power density of 6.67 mW/cm^(3);and its capacitance retention can reach 87.6%after 1000 charge/discharge cycles.A blue LED can be lighted with three supercapacitors connected in series,showing good electrochemical performance.In addition,the specific capacitance of Cu/CuO/PPy//CF can maintain more than 98.5%under different bending states compared to the flat state,exhibiting good electrochemical performance.The results indicate that the Cu/CuO/PPy composite has good application potential in flexible supercapacitor as electrode material.
作者
黄献
杨芮
高恩铭
秦旺
张开友
尹慧群
HUANG Xian;YANG Rui;GAO Enming;QIN Wang;ZHANG Kaiyou;YIN Huiqun(college of materials science and engineering,guilin university of technology,guilin 541006,china;key lab of new processing technology for nonferrous metals and materials ministry of education,guilin university of technology,guilin 541006,china;guangxi key laboratory of optoelectronic materials and devices,guilin university of technology,guilin 541006,china;provincial ministry collaborative innovation center for nonferrous metal mineral exploration and efficient resource utilization,guilin university of technology,guilin 541004,china)
出处
《桂林理工大学学报》
北大核心
2025年第4期604-613,共10页
Journal of Guilin University of Technology
基金
广西自然科学基金项目(2018JJA160029
2018GXNSFAA138041)
有色金属及材料加工新技术教育部重点实验室项目(20AA-17
22KF-2)
广西研究生教育创新计划项目(YCSW2022321)。
