Development of a New Mixed-Polyanion Cathode with Superior Electrochemical Performances for Na-Ion Batteries

Jungmin Kang; Hyunyoung Park; Hyungsub Kim; Jae Hyeon Jo; Wonseok Ko; Yongseok Lee; Seung Taek Myung; Jongsoon Kim

doi:10.1021/acssuschemeng.9b04944

Development of a New Mixed-Polyanion Cathode with Superior Electrochemical Performances for Na-Ion Batteries

Jungmin Kang
, Hyunyoung Park
, Hyungsub Kim
, Jae Hyeon Jo
, Wonseok Ko
, Yongseok Lee
, Seung Taek Myung
, Jongsoon Kim

Sejong University
Korea Atomic Energy Research Institute

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

29 Scopus citations

Abstract

We report on Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) as a high-energy-density cathode material for sodium-ion batteries. Detailed structural information for Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) is obtained from Rietveld refinement of X-ray diffraction data. We confirm that 2.7 mol Na⁺ ions per formula unit (116 mA h g^-1) can be (de)intercalated from the host Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) structure using first-principles calculation and various electrochemical tests. Moreover, Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) exhibits that 73% of the capacity at C/10 is retained even at 10 C (84 mA h g^-1). Notably, Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) delivers a high capacity retention of ∼75% compared with the initial capacity for 300 cycles with a high Coulombic efficiency of more than 99%. The redox reaction mechanism of Na₄[Mn_1.5Co_1.5](PO₄)₂(P₂O₇) during charge/discharge is also confirmed through combined studies using first-principles calculation and operando X-ray absorption near-edge structure analyses.

Original language	English
Pages (from-to)	163-171
Number of pages	9
Journal	ACS Sustainable Chemistry and Engineering
Volume	8
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.9b04944
State	Published - 13 Jan 2020
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

battery
cathode
first-principles calculation
inductive effect
mixed-polyanion
sodium

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10.1021/acssuschemeng.9b04944

Cite this

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title = "Development of a New Mixed-Polyanion Cathode with Superior Electrochemical Performances for Na-Ion Batteries",

abstract = "We report on Na4[Mn1.5Co1.5](PO4)2(P2O7) as a high-energy-density cathode material for sodium-ion batteries. Detailed structural information for Na4[Mn1.5Co1.5](PO4)2(P2O7) is obtained from Rietveld refinement of X-ray diffraction data. We confirm that 2.7 mol Na+ ions per formula unit (116 mA h g-1) can be (de)intercalated from the host Na4[Mn1.5Co1.5](PO4)2(P2O7) structure using first-principles calculation and various electrochemical tests. Moreover, Na4[Mn1.5Co1.5](PO4)2(P2O7) exhibits that 73\% of the capacity at C/10 is retained even at 10 C (84 mA h g-1). Notably, Na4[Mn1.5Co1.5](PO4)2(P2O7) delivers a high capacity retention of ∼75\% compared with the initial capacity for 300 cycles with a high Coulombic efficiency of more than 99\%. The redox reaction mechanism of Na4[Mn1.5Co1.5](PO4)2(P2O7) during charge/discharge is also confirmed through combined studies using first-principles calculation and operando X-ray absorption near-edge structure analyses.",

keywords = "battery, cathode, first-principles calculation, inductive effect, mixed-polyanion, sodium",

author = "Jungmin Kang and Hyunyoung Park and Hyungsub Kim and Jo, \{Jae Hyeon\} and Wonseok Ko and Yongseok Lee and Myung, \{Seung Taek\} and Jongsoon Kim",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2020",

month = jan,

day = "13",

doi = "10.1021/acssuschemeng.9b04944",

language = "English",

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journal = "ACS Sustainable Chemistry and Engineering",

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T1 - Development of a New Mixed-Polyanion Cathode with Superior Electrochemical Performances for Na-Ion Batteries

AU - Kang, Jungmin

AU - Park, Hyunyoung

AU - Kim, Hyungsub

AU - Jo, Jae Hyeon

AU - Ko, Wonseok

AU - Lee, Yongseok

AU - Myung, Seung Taek

AU - Kim, Jongsoon

PY - 2020/1/13

Y1 - 2020/1/13

N2 - We report on Na4[Mn1.5Co1.5](PO4)2(P2O7) as a high-energy-density cathode material for sodium-ion batteries. Detailed structural information for Na4[Mn1.5Co1.5](PO4)2(P2O7) is obtained from Rietveld refinement of X-ray diffraction data. We confirm that 2.7 mol Na+ ions per formula unit (116 mA h g-1) can be (de)intercalated from the host Na4[Mn1.5Co1.5](PO4)2(P2O7) structure using first-principles calculation and various electrochemical tests. Moreover, Na4[Mn1.5Co1.5](PO4)2(P2O7) exhibits that 73% of the capacity at C/10 is retained even at 10 C (84 mA h g-1). Notably, Na4[Mn1.5Co1.5](PO4)2(P2O7) delivers a high capacity retention of ∼75% compared with the initial capacity for 300 cycles with a high Coulombic efficiency of more than 99%. The redox reaction mechanism of Na4[Mn1.5Co1.5](PO4)2(P2O7) during charge/discharge is also confirmed through combined studies using first-principles calculation and operando X-ray absorption near-edge structure analyses.

AB - We report on Na4[Mn1.5Co1.5](PO4)2(P2O7) as a high-energy-density cathode material for sodium-ion batteries. Detailed structural information for Na4[Mn1.5Co1.5](PO4)2(P2O7) is obtained from Rietveld refinement of X-ray diffraction data. We confirm that 2.7 mol Na+ ions per formula unit (116 mA h g-1) can be (de)intercalated from the host Na4[Mn1.5Co1.5](PO4)2(P2O7) structure using first-principles calculation and various electrochemical tests. Moreover, Na4[Mn1.5Co1.5](PO4)2(P2O7) exhibits that 73% of the capacity at C/10 is retained even at 10 C (84 mA h g-1). Notably, Na4[Mn1.5Co1.5](PO4)2(P2O7) delivers a high capacity retention of ∼75% compared with the initial capacity for 300 cycles with a high Coulombic efficiency of more than 99%. The redox reaction mechanism of Na4[Mn1.5Co1.5](PO4)2(P2O7) during charge/discharge is also confirmed through combined studies using first-principles calculation and operando X-ray absorption near-edge structure analyses.

KW - battery

KW - cathode

KW - first-principles calculation

KW - inductive effect

KW - mixed-polyanion

KW - sodium

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M3 - Article

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SN - 2168-0485

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SP - 163

EP - 171

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

IS - 1

ER -

Development of a New Mixed-Polyanion Cathode with Superior Electrochemical Performances for Na-Ion Batteries

Abstract

UN SDGs

Keywords

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