A flexible free-standing FeF3/reduced graphene oxide film as cathode for advanced lithium-ion battery

Dafang He; Yanlin Zhang; Da Cao; Mufan Sun; Jiawei Xia; Yi Yang; Yujie Ding; Haiqun Chen

doi:10.1016/j.jallcom.2022.164702

A flexible free-standing FeF₃/reduced graphene oxide film as cathode for advanced lithium-ion battery

Dafang He, Yanlin Zhang, Da Cao, Mufan Sun, Jiawei Xia, Yi Yang, Yujie Ding, Haiqun Chen

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

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.

Original language	English
Article number	164702
Journal	Journal of Alloys and Compounds
Volume	909
DOIs	https://doi.org/10.1016/j.jallcom.2022.164702
State	Published - 15 Jul 2022
Externally published	Yes

Keywords

Cathode
Flexibility
Free-standing film
Iron fluoride
Lithium ion batteries

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jallcom.2022.164702

Cite this

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title = "A flexible free-standing FeF3/reduced graphene oxide film as cathode for advanced lithium-ion battery",

abstract = "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, \textasciitilde{}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 \textasciitilde{}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.",

keywords = "Cathode, Flexibility, Free-standing film, Iron fluoride, Lithium ion batteries",

author = "Dafang He and Yanlin Zhang and Da Cao and Mufan Sun and Jiawei Xia and Yi Yang and Yujie Ding and Haiqun Chen",

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year = "2022",

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T1 - A flexible free-standing FeF3/reduced graphene oxide film as cathode for advanced lithium-ion battery

AU - He, Dafang

AU - Zhang, Yanlin

AU - Cao, Da

AU - Sun, Mufan

AU - Xia, Jiawei

AU - Yang, Yi

AU - Ding, Yujie

AU - Chen, Haiqun

PY - 2022/7/15

Y1 - 2022/7/15

N2 - 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.

AB - 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.

KW - Cathode

KW - Flexibility

KW - Free-standing film

KW - Iron fluoride

KW - Lithium ion batteries

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