Rose-like VS2 Nanosheets Chemically Anchored on Carbon Nanotubes for Flexible Zinc-Ion Batteries with Enhanced Properties

• DOI: 10.1021/acsami.2c11317
• Publication Date: 2022-08-23T23:24:02Z
• Authors: Hongran Sun; Lei Yang; Enze Hu; Min Feng; Cheng Fan; Wanli Wang; Huifang Li; Xiaojun Wang; Zhiming Liu
• Keywords: Carbon fibers

Rechargeable aqueous zinc-ion batteries (ZIBs) are an attractive alternative for flexible energy storage devices due to their excellent safety and low cost. One of the main challenges that plagues practical applications is restricted variety cathode materials with fast reaction kinetics good mechanical properties. Herein, we prepared rose-like VS2 nanosheets which have decent specific capacities, metallic conductivity, open-enough channels further incorporated them into a single-walled carbon nanotube (SWCNT) network, achieving C–V chemical-bonded freestanding VS2@SWCNT (C-VS2) composite. Such chemical bonding in composites builds bridge rapid electron transfer ion diffusion longitudinal direction from one layer another layer. As result, reversible Zn/C-VS2 system core cells exhibits high capacity (205.3 mA h g–1 at 0.1 A g–1), cyclic stability (115.4 was obtained after 1500 cycles 5 remarkable rate capability (135.4 10 g–1). Furthermore, C-VS2 films flexibility conductivity can serve as assemble soft-packaged ZIBs. Meanwhile, ZIB has electrochemical even under different bending conditions (the discharge dropped by only 2.1 bending). This work offers insights rational design hosts throughout bond engineering.