Iron fluoride vertical nanosheets array modified with graphene quantum dots as long-life cathode for lithium ion batteries

Qi Zhang; Chengzhi Sun; Lishuang Fan; Naiqing Zhang; Kening Sun

doi:10.1016/j.cej.2019.04.073

Iron fluoride vertical nanosheets array modified with graphene quantum dots as long-life cathode for lithium ion batteries

Qi Zhang, Chengzhi Sun, Lishuang Fan, Naiqing Zhang^*, Kening Sun

^*Corresponding author for this work

Harbin Institute of Technology

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

70 Citations (Scopus)

Abstract

We successfully built a unique architecture of FeF₃·0.33H₂O, a self-supported, binder-free vertical nanosheets array directly growing on Ti foil by a simple solvothermal approach and firstly use graphene quantum dots to surface modification. The high specific surface area of 2D nanosheets and high conductivity of graphene quantum dots provide an expressway for charge transfer and ion transport. This unique structural design endows a capacity of 161.5 mAh g⁻¹ at 1 C and a capability of 117 mAh g⁻¹ at a high current density of 4 Ag⁻¹ (20 C). Graphene quantum dots surface modification can stabilize the structure and reduce possible side reactions, making the cycle performance greatly improved. Even cycled over 1000 times at 2 C the capacity attenuation rate is as low as 0.03% per cycle.

Original language	English
Pages (from-to)	245-251
Number of pages	7
Journal	Chemical Engineering Journal
Volume	371
DOIs	https://doi.org/10.1016/j.cej.2019.04.073
Publication status	Published - 1 Sept 2019
Externally published	Yes

Keywords

Array electrode
Graphene quantum dots
Iron fluoride
LIBs
Super long-life

UN SDGs

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

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10.1016/j.cej.2019.04.073

Cite this

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title = "Iron fluoride vertical nanosheets array modified with graphene quantum dots as long-life cathode for lithium ion batteries",

abstract = "We successfully built a unique architecture of FeF3·0.33H2O, a self-supported, binder-free vertical nanosheets array directly growing on Ti foil by a simple solvothermal approach and firstly use graphene quantum dots to surface modification. The high specific surface area of 2D nanosheets and high conductivity of graphene quantum dots provide an expressway for charge transfer and ion transport. This unique structural design endows a capacity of 161.5 mAh g−1 at 1 C and a capability of 117 mAh g−1 at a high current density of 4 Ag−1 (20 C). Graphene quantum dots surface modification can stabilize the structure and reduce possible side reactions, making the cycle performance greatly improved. Even cycled over 1000 times at 2 C the capacity attenuation rate is as low as 0.03% per cycle.",

keywords = "Array electrode, Graphene quantum dots, Iron fluoride, LIBs, Super long-life",

author = "Qi Zhang and Chengzhi Sun and Lishuang Fan and Naiqing Zhang and Kening Sun",

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doi = "10.1016/j.cej.2019.04.073",

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AU - Zhang, Qi

AU - Sun, Chengzhi

AU - Fan, Lishuang

AU - Zhang, Naiqing

AU - Sun, Kening

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We successfully built a unique architecture of FeF3·0.33H2O, a self-supported, binder-free vertical nanosheets array directly growing on Ti foil by a simple solvothermal approach and firstly use graphene quantum dots to surface modification. The high specific surface area of 2D nanosheets and high conductivity of graphene quantum dots provide an expressway for charge transfer and ion transport. This unique structural design endows a capacity of 161.5 mAh g−1 at 1 C and a capability of 117 mAh g−1 at a high current density of 4 Ag−1 (20 C). Graphene quantum dots surface modification can stabilize the structure and reduce possible side reactions, making the cycle performance greatly improved. Even cycled over 1000 times at 2 C the capacity attenuation rate is as low as 0.03% per cycle.

AB - We successfully built a unique architecture of FeF3·0.33H2O, a self-supported, binder-free vertical nanosheets array directly growing on Ti foil by a simple solvothermal approach and firstly use graphene quantum dots to surface modification. The high specific surface area of 2D nanosheets and high conductivity of graphene quantum dots provide an expressway for charge transfer and ion transport. This unique structural design endows a capacity of 161.5 mAh g−1 at 1 C and a capability of 117 mAh g−1 at a high current density of 4 Ag−1 (20 C). Graphene quantum dots surface modification can stabilize the structure and reduce possible side reactions, making the cycle performance greatly improved. Even cycled over 1000 times at 2 C the capacity attenuation rate is as low as 0.03% per cycle.

KW - Array electrode

KW - Graphene quantum dots

KW - Iron fluoride

KW - LIBs

KW - Super long-life

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Iron fluoride vertical nanosheets array modified with graphene quantum dots as long-life cathode for lithium ion batteries

Abstract

Keywords

UN SDGs

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