A Flexible Free-Standing Fef3/Reduced Graphene Oxide Film as Cathode for Advanced Lithium-Ion Battery
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 to realize commercialization. Herein, a flexible free-standing FeF3/ chitosan pyrolytic carbon/reduced graphene oxide (FeF3 /C/RGO) film as 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 FeF 3 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 ~30nm . Benefiting from the free-standing structure, the FeF3/C/RGO film can achieve an admirable capacity up to 220.1 mAh·g–1 over 200 cycles at 100 mA·g–1, showing great potential for wearable and flexible electronic devices
Year of publication: |
[2022]
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Authors: | Zhang, Yanlin ; Cao, Da ; Xia, Jiawei ; Yang, Yi ; Ding, Yujie ; He, Dafang ; Chen, Haiqun |
Publisher: |
[S.l.] : SSRN |
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