title: Design of Amorphous Manganese Oxide@Multiwalled Carbon Nanotube Fiber for Robust Solid-State Supercapacitor.
abstract: Solid-state fiber-based supercapacitors have been considered promising energy storage devices for wearable electronics due to their lightweight and amenability to be woven into textiles. Efforts have been made to fabricate a high performance fiber electrode by depositing pseudocapacitive materials on the outer surface of carbonaceous fiber, for example, crystalline manganese oxide/multiwalled carbon nanotubes (MnO2/MWCNTs). However, a key challenge remaining is to achieve high specific capacitance and energy density without compromising the high rate capability and cycling stability. In addition, amorphous MnO2is actually preferred due to its disordered structure and has been proven to exhibit superior electrochemical performance over the crystalline one. Herein, by incorporating amorphous MnO2onto a well-aligned MWCNT sheet followed by twisting, we design an amorphous MnO2@MWCNT fiber, in which amorphous MnO2nanoparticles are distributed in MWCNT fiber uniformly. The proposed structure gives the amorphous MnO2@MWCNT fiber good mechanical reliability, high electrical conductivity, and fast ion-diffusion. Solid-state supercapacitor based on amorphous MnO2@MWCNT fibers exhibits improved energy density, superior rate capability, exceptional cycling stability, and excellent flexibility. This study provides a strategy to design a high performance fiber electrode with microstructure control for wearable energy storage devices.
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Peipei
authors.initials: P
authors.lastname: Shi
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Li
authors.initials: L
authors.lastname: Hua
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Qian
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China , Hefei 230026, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: School of Physical Science and Technology, Lanzhou University , 222 South Tianshui Road, Lanzhou 730000, China.
authors.forename: Jinyuan
authors.identifier: 0000-0003-0284-105X
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.
authors.forename: Gengzhi
authors.identifier: 0000-0002-8000-8912
authors.initials: G
authors.lastname: Sun
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.|Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications , 9 Wenyuan Road, Nanjing 210023, China.
authors.forename: Wei
authors.identifier: 0000-0001-7004-6408
authors.initials: W
authors.lastname: Huang
keywords: amorphous manganese oxide; carbon nanotube; energy storage; fiber; supercapacitor