Porous Mo–Co–S Nanosheets on Carbon Cloth for All‐Solid‐State Flexible Asymmetric Supercapacitors

• DOI: 10.1002/admi.201901138
• Publication Date: 2019-09-25T22:10:13Z
• Authors: Xiaoya Zhou; Yanfang Ren; Yao Lu; Zijin Cheng; Wenjun Wang; Qian Wang; Wei Huang; Xiaochen Dong
• Keywords: Power density; Vinyl alcohol; Carbon fibers; Quasi-solid

Abstract High‐performance and flexible supercapacitors (SCs) have great potential for powering wearable portable devices. Herein, Mo‐doped Co 9 S 8 porous nanosheets on carbon cloth (denoted as Mo–Co–S/CC) are prepared all‐solid‐state asymmetric SCs via a two‐step method. Na 2 MoO 4 is selected both Mo source etching agent to create structure, which provides plenty of reaction sites contributing the decrease electrochemical barrier increase performances. The Mo–Co–S/CC electrode demonstrates high specific capacity 771.5 F g −1 at A , excellent rate capability 660.0 20 109% cycling capacitance retention after 30 000 cycles. By using poly(vinyl alcohol)/KOH (PVA/KOH) gel electrolyte, supercapacitor (Mo–Co–S/CC//KOH//AC/CC, FASCs) assembled, can work under different bending angles deliver 37.37 1 . Furthermore, FASCs maximum energy density 14.68 Wh kg power 369 W with 80.07% over cycles