• 文献标题:   A flexible free-standing FeF3/reduced graphene oxide film as cathode for advanced lithium-ion battery
  • 文献类型:   Article
  • 作  者:   HE DF, ZHANG YL, CAO D, SUN MF, XIA JW, YANG Y, DING YJ, CHEN HQ
  • 作者关键词:   iron fluoride, freestanding film, flexibility, cathode, lithium ion batterie
  • 出版物名称:   JOURNAL OF ALLOYS COMPOUNDS
  • ISSN:   0925-8388 EI 1873-4669
  • 通讯作者地址:  
  • 被引频次:   11
  • DOI:   10.1016/j.jallcom.2022.164702 EA APR 2022
  • 出版年:   2022

▎ 摘  要

High-capacity cathode materials of metal fluorides generally undergo low conductivities and sluggish kinetics derived from a multielectron-transfer conversion reaction mechanism, which severely hinder the cycling stability and rate performance towards their commercialization. Herein, a flexible free-standing FeF3/chitosan pyrolytic carbon/reduced graphene oxide (FeF3/C/RGO) film as an additive-free cathode was designed and prepared by a facile hydrothermal strategy followed by sequential freeze-drying, thermal reduction and fluorination post-treatments. The ultrafine FeF3 nanoparticles (NPs, ~30 nm) are confined within highly ordered RGO film, effectively reducing the Li+ diffusion pathway while the RGO sheets act as a matrix to restrict the complicated interlamination reaction (Fe3+? Fe2+? Fe) between adjacent interlayers with the spacing of ~30 nm. Benefiting from the free-standing structure, the FeF3/C/RGO film can achieve an admirable capacity up to 220 mAh g(-1) over 200 cycles at 100 mA g(-1), showing great potential for wearable and flexible electronic devices. (C) 2022 Elsevier B.V. All rights reserved.