Tailored voltage plateau enabling superior sodium storage for Fe-based fluorophosphate cathode

Liang, Huihui; Ge, Xiaochen; Wang, Xu; Li, Jie; Li, Xiaodong; Li, Simin; Lai, Yanqing; Zhang, Zhian

doi:10.1016/j.ensm.2023.102905

Cited by 2 publications

(2 citation statements)

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“…32(b)) exhibited reversible behavior as compared with the charge, which confirmed that NFPF exhibited high reversible capacity when used as a cathode for SIBs. He et al 281 investigated the lattice structure and physicochemical properties of NFPF through Zr atom modification (NFPF-0.07Zr). Experiment and theoretical computation confirmed that the Zr atoms stimulated the electrochemical activity and extended the width, and increased the proportion, of the first plateau, Fig.…”

Section: Iron-based Polyanionic Compoundsmentioning

confidence: 99%

“…He et al . 281 investigated the lattice structure and physicochemical properties of NFPF through Zr atom modification (NFPF-0.07Zr). Experiment and theoretical computation confirmed that the Zr atoms stimulated the electrochemical activity and extended the width, and increased the proportion, of the first plateau, Fig.…”

Section: Fe-based Cathode Materials For Sibsmentioning

confidence: 99%

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Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Li,

Wang,

Wang

et al. 2024

Chem. Soc. Rev.

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Section: Iron-based Polyanionic Compoundsmentioning

confidence: 99%

Section: Fe-based Cathode Materials For Sibsmentioning

confidence: 99%

Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Li,

Wang,

Wang

et al. 2024

Chem. Soc. Rev.

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Achieving High Rate and Long Cycle Performance of Na₂FePO₄F Cathode Through Co‐Modification of Ti Doping and Carbon Coating

Deng,

Zhang,

Pei

et al. 2024

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Layered Na2FePO4F (NFPF) cathode material has received widespread attention due to its green nontoxicity, abundant raw materials, and low cost. However, its poor inherent electronic conductivity and sluggish sodium ion transportation seriously impede its capacity delivery and cycling stability. In this work, NFPF by Ti doping and conformal carbon layer coating via solid‐state reaction is modified. The results of experimental study and density functional theory calculations reveal that Ti doping enhances intrinsic conductivity, accelerates Na‐ion transport, and generates more Na‐ion storage sites, and pyrolytic carbon from polyvinylpyrrolidone (PVP) uniformly coated on the NFPF surface improves the surface/interface conductivity and suppresses the side reactions. Under the combined effect of Ti doping and carbon coating, the optimized NFPF (marked as 5T‐NF@C) exhibits excellent electrochemical performance, with a high capacity of 108.4 mAh g−1 at 0.2C, a considerable capacity of 80.0 mAh g−1 even at high current density of 10C, and a high capacity retention rate of 81.8% after 2000 cycles at 10C. When assembled into a full cell with a hard carbon anode, 5T‐NF@C also show good applicability. This work indicates that co‐modification of Ti doping and carbon coating makes NFPF achieve high rate and long cycle performance for sodium‐ion batteries.

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Tailored voltage plateau enabling superior sodium storage for Fe-based fluorophosphate cathode

Cited by 2 publications

References 50 publications

Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Achieving High Rate and Long Cycle Performance of Na₂FePO₄F Cathode Through Co‐Modification of Ti Doping and Carbon Coating

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Tailored voltage plateau enabling superior sodium storage for Fe-based fluorophosphate cathode

Cited by 2 publications

References 50 publications

Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Progress and perspectives on iron-based electrode materials for alkali metal-ion batteries: a critical review

Achieving High Rate and Long Cycle Performance of Na2FePO4F Cathode Through Co‐Modification of Ti Doping and Carbon Coating

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Achieving High Rate and Long Cycle Performance of Na₂FePO₄F Cathode Through Co‐Modification of Ti Doping and Carbon Coating