Na4Fe1.5Mn1.5(PO4)2(P2O7): A low-cost and earth-abundant cathode for robust sodium storage

Hao Fan; Congcong Cai; Xiaobin Liao; Ping Hu; Xinyuan Li; Jiantao Li; Sungsik Lee; Changliang Chen; Ting Zhu; Zhuo Chen; Mengyao Wang; Liqiang Mai; Liang Zhou

doi:10.1016/j.mtener.2024.101552

Na₄Fe_1.5Mn_1.5(PO₄)₂(P₂O₇): A low-cost and earth-abundant cathode for robust sodium storage

Hao Fan, Congcong Cai, Xiaobin Liao, Ping Hu, Xinyuan Li, Jiantao Li, Sungsik Lee, Changliang Chen, Ting Zhu, Zhuo Chen, Mengyao Wang, Liqiang Mai, Liang Zhou^*

^*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

The mixed compounds of phosphates and pyrophosphates are attractive cathodes for sodium-ion batteries (SIBs) owing to their robust open framework structure and superior diffusion dynamics. However, most reported mixed phosphate cathodes generally suffer from low operating potential. Herein, we develop a bimetallic Na₄Fe_1.5Mn_1.5(PO₄)₂(P₂O₇)/C-rGO (NFMPP/C-rGO) cathode, which possesses two working plateaus at 2.92 and 3.95 V. The obtained NFMPP/C-rGO demonstrates a stable high capacity of over 120 mAh g⁻¹ at 0.1 C. In-situ XRD characterization discloses a solid solution reaction for the Fe^2+/3+ redox couple and a two-phase reaction for the Mn^2+/3+ redox couple. First-principles calculations reveal the migration of Na⁺ in NFMPP has low barriers. This work provides a new, low-cost, earth-abundant, and stable cathode choice for practical SIBs.

Original language	English
Article number	101552
Journal	Materials Today Energy
Volume	42
DOIs	https://doi.org/10.1016/j.mtener.2024.101552
Publication status	Published - Jun 2024
Externally published	Yes

Keywords

Cathode materials
Earth-abundant
Fe–Mn-based mixed phosphate
Low cost
Sodium-ion batteries

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

Access to Document

10.1016/j.mtener.2024.101552

Cite this

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title = "Na4Fe1.5Mn1.5(PO4)2(P2O7): A low-cost and earth-abundant cathode for robust sodium storage",

abstract = "The mixed compounds of phosphates and pyrophosphates are attractive cathodes for sodium-ion batteries (SIBs) owing to their robust open framework structure and superior diffusion dynamics. However, most reported mixed phosphate cathodes generally suffer from low operating potential. Herein, we develop a bimetallic Na4Fe1.5Mn1.5(PO4)2(P2O7)/C-rGO (NFMPP/C-rGO) cathode, which possesses two working plateaus at 2.92 and 3.95 V. The obtained NFMPP/C-rGO demonstrates a stable high capacity of over 120 mAh g−1 at 0.1 C. In-situ XRD characterization discloses a solid solution reaction for the Fe2+/3+ redox couple and a two-phase reaction for the Mn2+/3+ redox couple. First-principles calculations reveal the migration of Na+ in NFMPP has low barriers. This work provides a new, low-cost, earth-abundant, and stable cathode choice for practical SIBs.",

keywords = "Cathode materials, Earth-abundant, Fe–Mn-based mixed phosphate, Low cost, Sodium-ion batteries",

author = "Hao Fan and Congcong Cai and Xiaobin Liao and Ping Hu and Xinyuan Li and Jiantao Li and Sungsik Lee and Changliang Chen and Ting Zhu and Zhuo Chen and Mengyao Wang and Liqiang Mai and Liang Zhou",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Ltd",

year = "2024",

month = jun,

doi = "10.1016/j.mtener.2024.101552",

language = "English",

volume = "42",

journal = "Materials Today Energy",

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TY - JOUR

T1 - Na4Fe1.5Mn1.5(PO4)2(P2O7)

T2 - A low-cost and earth-abundant cathode for robust sodium storage

AU - Fan, Hao

AU - Cai, Congcong

AU - Liao, Xiaobin

AU - Hu, Ping

AU - Li, Xinyuan

AU - Li, Jiantao

AU - Lee, Sungsik

AU - Chen, Changliang

AU - Zhu, Ting

AU - Chen, Zhuo

AU - Wang, Mengyao

AU - Mai, Liqiang

AU - Zhou, Liang

PY - 2024/6

Y1 - 2024/6

N2 - The mixed compounds of phosphates and pyrophosphates are attractive cathodes for sodium-ion batteries (SIBs) owing to their robust open framework structure and superior diffusion dynamics. However, most reported mixed phosphate cathodes generally suffer from low operating potential. Herein, we develop a bimetallic Na4Fe1.5Mn1.5(PO4)2(P2O7)/C-rGO (NFMPP/C-rGO) cathode, which possesses two working plateaus at 2.92 and 3.95 V. The obtained NFMPP/C-rGO demonstrates a stable high capacity of over 120 mAh g−1 at 0.1 C. In-situ XRD characterization discloses a solid solution reaction for the Fe2+/3+ redox couple and a two-phase reaction for the Mn2+/3+ redox couple. First-principles calculations reveal the migration of Na+ in NFMPP has low barriers. This work provides a new, low-cost, earth-abundant, and stable cathode choice for practical SIBs.

AB - The mixed compounds of phosphates and pyrophosphates are attractive cathodes for sodium-ion batteries (SIBs) owing to their robust open framework structure and superior diffusion dynamics. However, most reported mixed phosphate cathodes generally suffer from low operating potential. Herein, we develop a bimetallic Na4Fe1.5Mn1.5(PO4)2(P2O7)/C-rGO (NFMPP/C-rGO) cathode, which possesses two working plateaus at 2.92 and 3.95 V. The obtained NFMPP/C-rGO demonstrates a stable high capacity of over 120 mAh g−1 at 0.1 C. In-situ XRD characterization discloses a solid solution reaction for the Fe2+/3+ redox couple and a two-phase reaction for the Mn2+/3+ redox couple. First-principles calculations reveal the migration of Na+ in NFMPP has low barriers. This work provides a new, low-cost, earth-abundant, and stable cathode choice for practical SIBs.

KW - Cathode materials

KW - Earth-abundant

KW - Fe–Mn-based mixed phosphate

KW - Low cost

KW - Sodium-ion batteries

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