文献类型：期刊文献

英文题名：Microfluidic-Architected Nanoarrays/Porous Core-Shell Fibers toward Robust Micro-Energy-Storage

作者：Meng, Jinku[1];Wu, Guan[1];Wu, Xingjiang[1];Cheng, Hengyang[1];Xu, Zhi[2];Chen, Su[1]

机构：[1]Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, Jiangsu Key Lab Fine Chem & Funct Polymer Mat, Nanjing 210009, Jiangsu, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：7

期号：1

外文期刊名：ADVANCED SCIENCE

收录：;EI(收录号：20194807746321);WOS:【SCI-EXPANDED(收录号:WOS:000498252300001)】；

基金：This work was supported by the National Natural Science Foundation of China (21736006 and 21706120), Natural Science Foundation of Jiangsu province (BK20170973), National Key Research and Development Program of China (2016YFB0401700), Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China Postdoctoral Science Foundation (2018M630549 and 2019T120420) and Fund of State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201720 and ZK201704).

语种：英文

外文关键词：fibers; microfluidics; micro-supercapacitors; nickel oxide arrays; porous graphene

摘要：Methods enabling the controllable fabrication of orderly structural and active nanomaterials, along with high-speed ionic pathways for charge migration and storage are highly fundamental in fiber-shaped micro-supercapacitors (MSCs). However, due to fiber-electrodes with compact internal microstructure and less porosity, MSCs usually display a low energy density. Here, an innovative microfluidic strategy is proposed to design ordered porous and anisotropic core-shell fibers based on nickel oxide arrays/graphene nanomaterials. Owing to the homogeneous microchannels reaction, the graphene core maintains a uniformly anisotropic porous structure, and the nickel oxide shell keeps steadily vertically aligned nanosheets. The MSC presents an ultrahigh energy density (120.3 mu Wh cm(-2)) and large specific capacitance (605.9 mF cm(-2)). This higher performance originates from the microfluidic-architected core-shell fiber with abundant ionic channels (plentiful micro-/mesopores), large specific-surface-area (425.6 m(2) g(-1)), higher electrical conductivity (176.6 S cm(-1)), and sufficient redox activity, facilitating ions with quicker diffusion and greater accumulation. Considering those outstanding properties, a wearable self-powered system, converting and storing solar energy into electric energy, is designed to light up displays. This microfluidic strategy offers an effective way to design new structural materials, which will advance the development of next-generation wearable/smart industries.