MnO2 Nanosheet‐Assembled Hollow Polyhedron Grown on Carbon Cloth for Flexible Aqueous Zinc‐Ion Batteries. Issue 6 (9th January 2020)

• Record Type: Journal Article
• Authors: Wu, Fangfang; Gao, Xiaobin; Xu, Xilian; Jiang, Yani; Gao, Xinlong; Yin, Ruilian; Shi, Wenhui; Liu, Wenxian; Lu, Gang; Cao, Xiehong
• Is Part Of: ChemSusChem. Volume 13:Issue 6(2020)
• Page Start: 1537
• Page End: 1545
• Publication Date: 2020-01-09
• Subjects: aqueous electrolyte -- flexible batteries -- hierarchical structures -- MnO2 hollow polyhedrons -- zinc-ion batteries; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201903006
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Aqueous zinc‐ion batteries (ZIBs) have been considered as prospective alternatives for lithium‐ion batteries, which are able to serve as power sources for next‐generation wearable and flexible devices, owing to the merits of abundant zinc resources and high safety of aqueous electrolyte. However, the lack of suitable cathode materials with flexibility for ZIBs hinders their further application. Herein, a novel cathode material [i.e., MnO2 nanosheet‐assembled hollow polyhedron anchored on carbon cloth (MnO2 /CC)] was prepared through a rapid hydrothermal method by using ZIF‐67 as self‐sacrificing template. When tested in an aqueous ZIB, the MnO2 /CC delivered a high reversible capacity of 263.9 mAh g −1 at 1.0 A g −1 after 300 cycles, far exceeding those of the commercial MnO2 electrode. More importantly, benefiting from the unique structural advantages, a flexible ZIB assembled based on the MnO2 /CC displayed a stable output voltage of 1.53 V and a specific capacity of 91.7 mAh g −1 at 0.1 A g −1 after 30 cycles. It also successfully lit LED bulbs even under different bending angles, showing good flexibility. This research contributes to the development of MnO2 ‐based cathode materials for high‐performance flexible ZIBs. Abstract : Flexing its performance : A high‐performance, flexible aqueous zinc‐ion battery (ZIB) is fabricated with a carbon cloth‐coated MnO2 nanosheet‐assembled hollow polyhedron, which is obtained through a facile and wet‐chemical synthetic approach. The flexible ZIB is able to power a LED under different bending states, demonstrating the utility of this hierarchically structured cathode material.