Carbon Nanoarrays Embedded with Metal Compounds for High‐Performance Flexible Supercapacitors. Issue 1 (3rd December 2019)

• Record Type: Journal Article
• Authors: Zhu, Chenyu; Guan, Cao; Cai, Dongming; Chen, Tian; Wang, Yonghui; Du, Junjie; Wu, Jun; Xu, Xi; Yu, Hong; Huang, Wei
• Is Part Of: Batteries & supercaps. Volume 3:Issue 1(2020)
• Page Start: 93
• Page End: 100
• Publication Date: 2019-12-03
• Subjects: nanoarrays -- metal-organic framework -- flexible supercapacitor -- energy storage; Electrochemistry -- Periodicals; Electrodes -- Periodicals; Electric batteries -- Periodicals; 621.31242
• DOI: 10.1002/batt.201900174
• Languages: English
• ISSNs: 2566-6223

Abstract

Abstract: Metal‐organic frameworks (MOFs)‐derived nanoarrays have been widely used as electrode materials in energy storage applications with the unique morphology and large specific surface area. Herein, we report a series of N‐doped carbon arrays embedded with different metal compounds (noted as NC@Co3 O4, NC@CoSe2 and NC@CoS2 ), which have been derived from a Co‐based MOF through simple fabrication processes. The resulted structures have high surface‐to‐volume ratio and short charge‐transfer paths in electrochemical reactions, which greatly benefit the energy storage performance. An asymmetric supercapacitor of NC@CoS2 //Co‐NC@Fe2 O3 is also demonstrated, which has a power density up to 23.5 kW/kg and illustrates good cycling stability after long‐time rapid charging and discharging. This work demonstrates a promising way to develop MOF‐derived nanoarrays for flexible energy storage devices. Abstract : That's so metal ! series of N‐doped carbon arrays embedded with different metal compounds from Co‐MOF as positive electrode for flexible asymmetric supercapacitors is presented. A systematic evaluation is reported covering atomic structure and reaction (facile fabrication method), nano/micro‐structure (self‐supported porous carbon‐metal compound nanoarrays), and potential applications (such as flexible supercapacitors). An asymmetric supercapacitor of NC@CoS2 //Co‐NC@Fe2 O3 provides a high‐power density of 23.5 kW/kg and illustrates good cycling stability after long‐time rapid charging and discharging.