In situ construction of oxygen vacancy-rich and fluorine-doped carbon-coated Ca2Fe2O5 for improved lithium storage performance

Piao, Zhu; Yang, Gang; Sun, Xiujuan; Cao, Qiuhan; Zhao, Yongjie; Ding, Rui; Liu, Enhui; Gao, Ping

doi:10.1039/d3nj00242j

New J. Chem.

2023

DOI: 10.1039/d3nj00242j

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In situ construction of oxygen vacancy-rich and fluorine-doped carbon-coated Ca₂Fe₂O₅ for improved lithium storage performance

Zhu Piao

Gang Yang

Xiujuan Sun

et al.

Abstract: Transition metal oxides (TMOs) have caused great concerns as anode candidates for state-of-the-art lithium-ion batteries (LIBs). However, the intrinsic deficiencies of low electrical conductivity and bulk effect greatly impede their...

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2024

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Advanced Electrode Materials Based on Brownmillerite Calcium Ferrite for Li‐Ion Batteries

Spanu,

Celeste,

Bozza

et al. 2024

Batteries & Supercaps

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Iron‐based materials are considered potential anode materials for lithium‐ion batteries thanks to their low cost, abundancy, non‐flammability, good safety, environmental benignity, and high specific capacity. Here, a series of calcium iron oxides materials having brownmillerite structure (i.e., Ca2Fe2‐xMxO5, where M=Mn, Ni and Cu and x=0 and 0.1) has been extensively studied for their use as conversion anodes in lithium cell. In particular, a mechanochemical approach has been used either to synthesize the samples and to prepare electrodes for the tests in lithium cell. Ca2Fe2O5 based electrodes proved excellent performance in lithium cell, approaching the theoretical capacity and being stable upon prolonged cycling (529 mAh g‐1 at C/10 and a capacity retention of 81 % after 100 cycles). Through the use of ex‐situ diffraction measurements, we have analyzed the conversion mechanism and proved the partial reversibility of its electrochemical reaction. Also, the incorporation of dopants into the structure of calcium iron oxide resulted in further improvement of its electrochemical performance as is the case of Mn doped sample that show a considerable specific capacity of 567 mAh g‐1 and the capacity retention is almost 99 % after 100 cycles.

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Advanced Electrode Materials Based on Brownmillerite Calcium Ferrite for Li‐Ion Batteries

Spanu,

Celeste,

Bozza

et al. 2024

Batteries & Supercaps

View full text Add to dashboard Cite

show abstract

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In situ construction of oxygen vacancy-rich and fluorine-doped carbon-coated Ca₂Fe₂O₅ for improved lithium storage performance

Abstract: Transition metal oxides (TMOs) have caused great concerns as anode candidates for state-of-the-art lithium-ion batteries (LIBs). However, the intrinsic deficiencies of low electrical conductivity and bulk effect greatly impede their...

Cited by 1 publication

References 53 publications

Advanced Electrode Materials Based on Brownmillerite Calcium Ferrite for Li‐Ion Batteries

Advanced Electrode Materials Based on Brownmillerite Calcium Ferrite for Li‐Ion Batteries

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