Amphiphilic core-sheath structured composite fiber for comprehensively performed supercapacitor

作     者：Xuemei Fu Zhuoer Li Limin Xu Meng Liao Hao Sun Songlin Xie Xuemei Sun Bingjie Wang Huisheng Peng 付雪梅;黎卓尔;许黎敏;廖萌;孙浩;解松林;孙雪梅;王兵杰;彭慧胜

作者机构：Laboratory of Advanced Materials State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan University Shanghai 200438 China Department of Chemistry Stanford University California 94305 the United States 

基　　金：supported by the Ministry of Science and Technology (2016YFA0203302) the National Natural Science Foundation of China (21634003, 51573027, 51673043, 21604012, 21805044 and 21875042) Shanghai Science and Technology Committee (16JC1400702, 17QA1400400, 18QA1400700 and 18QA1400800) SHMEC (2017-01-07-00-07-E00062) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2019年第62卷第7期

页      码：955-964页

摘      要：As an im portant branch of fiber-shaped energy storage devices, the fiber-shaped supercapacitor has been widely studied recently. However, it remains challenging to simultaneously achieve fast electron transport and excellent ion accessibility in one single fiber electrode of the fibershaped supercapacitor. Herein, a novel family of amphiphilic core-sheath structured carbon nanotube composite fibers has been developed and applied to the fiber-shaped supercapacitor to address the above challenge. The polyaniline-modified hydrophilic sheath of the composite fiber electrode effectively enhanced the electrochemical property via advancing ion accessibility, while Au-deposited hydrophobic core demonstrated improved electrical conductivity by fast electron supply. On the basis of a synergistic effect, a remarkable specific capacitance of 324 F cm^-3 at 0.5 A cm^-3 and greatly enhanced rate performance were achieved, i.e” a 79% retention (256 F cm 3) at 50 A cm^-3. The obtained fiber-shaped supercapacitor finally displayed remarkable energy and power densities of 7.2 mW h cm 3 and 10 W cm^-3, respectively. The strategy developed herein also presents a general pathway towards novel fiber electrodes for high-performance wearable devices.

主 题 词：hyd rop hobicity hyd rop hilicity am phiphilic coresheath supercapacitor electron tran sport ion accessibility 

学科分类：08[工学] 0805[工学-能源动力学] 080502[080502] 

核心收录：

D　O　I：10.1007/s40843-018-9408-3

馆 藏 号：203658083...