ZnO@Mo-CNT-MnO_(2)纳米阵列用于构筑超高倍率性能的柔性非对称超级电容器  

The incorporation of Mo and CNTs in a ZnO@MnO_(2)nanoarray enabling flexible asymmetric supercapacitor with ultra-high rate capability

作　　者：庄绍杰 彭新元 裴锋 孙骆 叶志国 黄军同 李多生 金钟 Shaojie Zhuang;Xinyuan Peng;Feng Pei;Luo Sun;Zhiguo Ye;Juntong Huang;Duosheng Li;Zhong Jin(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;State Key Laboratory of Coordination Chemistry,MOE Key Laboratory of Mesoscopic Chemistry,MOE Key Laboratory of High Performance Polymer Materials and Technology,Jiangsu Key Laboratory of Advanced Organic Materials,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China [2]State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China [3]State Key Laboratory of Coordination Chemistry,MOE Key Laboratory of Mesoscopic Chemistry,MOE Key Laboratory of High Performance Polymer Materials and Technology,Jiangsu Key Laboratory of Advanced Organic Materials,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China

出　　处：《Science China Materials》2023年第6期2207-2215,共9页中国科学（材料科学（英文版）

基　　金：supported by the National Key R&D Program of China(2017YFA0208200);the National Natural Science Foundation of China(51862026,22022505 and 21872069);the Aeronautical Science Foundation of China(2017ZF56027);the Natural Science Foundation of Jiangxi Province(20192ACBL21048);the Key Research and Development Program of Jiangxi Province(20203BBE53069);the Fundamental Research Funds for the Central Universities(020514380266,020514380272 and 020514380274);the Scientific and Technological Innovation Special Fund for Carbon Peak and Carbon Neutrality of Jiangsu Province(BK20220008)。

摘　　要：MnO_(2)作为超级电容器电极材料具有理论比电容高、成本低、环境友好等优点,但其低导电性和低利用率阻碍了其潜在应用.本研究首先在柔性碳布上电化学生长ZnO纳米棒阵列作为电极衬底,然后通过阳极电沉积法在ZnO纳米棒阵列表面外延生长了Mo和碳纳米管(CNTs)共掺杂的MnO_(2)薄膜,可控构筑了有效、高导电性的MnO_(2)纳米阵列电极(定义为ZnO@Mo-CNT-MnO_(2)NA).柔性ZnO@Mo-CNTMnO_(2)NA电极在100 A g^(-1)的大电流充放电密度下比电容可达237.5 F g^(-1),10,000次循环后电容保留率高达86%.采用ZnO@Mo-CNTMnO_(2)NA电极组装成水系非对称超级电容器,弯曲状态下在132.35 mW cm^(-3)(5mA cm^(-2))高功率密度下获得了1.13 mW h cm^(-3)的高能量密度,5mA cm^(-2)充放电倍率下循环7600次后电容保留率高达88%.本研究构筑的MnO_(2)基纳米阵列电极结构可提高其电导率和利用率,为柔性金属氧化物超级电容器电极的设计与制备提供新途径.Manganese dioxide possesses a high theoretical specific capacitance,low cost and environmental friendliness as a supercapacitor electrode material,but its low electrical conductivity and utilization impede its potential capacity.Here,ZnO nanorod arrays electrochemically grown on flexible carbon cloth were fabricated as the electrode substrate.Mo species and carbon nanotubes(CNTs)were anodically coelectrodeposited onto MnO_(2)film that epitaxially grew on the surface of ZnO nanorods by a facile electrochemical method,achieving a highly conductive and accessible MnO_(2)nanoarray electrode(denoted ZnO@Mo-CNT-MnO_(2)NA).The flexible ZnO@Mo-CNT-MnO_(2)NA electrode exhibits a superior specific capacitance of 237.5 F g^(-1)at an extremely high chargedischarge rate of 100 A g^(-1)and a high capacitance retention of86%after 10,000 cycles.The aqueous asymmetric device assembled with our ZnO@Mo-CNT-MnO_(2)NA electrode in a bent state obtains a high energy density of 1.13 mW h cm^(-3)at a high power density of 132.35 mW cm^(-3)(5 mA cm^(-2))and a high capacitance retention of 88%after cycling 7600 times at a charge-discharge rate of 5 mA cm^(-2).The architecture of the MnO_(2)-based NA provides a novel avenue to enhance conductivity and utilization for the design and fabrication of flexible metal oxide supercapacitor electrodes.

关 键 词：ZNO纳米棒阵列 纳米阵列 金属氧化物 弯曲状态 超级电容器 高倍率性能 高能量密度 比电容 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM53[电气工程—电器]