FeS2 microsphere as cathode material for rechargeable lithium batteries

Yiming Tao; Kun Rui; Zhaoyin Wen; Qingsong Wang; Jun Jin; Tao Zhang; Tian Wu

doi:10.1016/j.ssi.2016.04.005

FeS₂ microsphere as cathode material for rechargeable lithium batteries

Yiming Tao, Kun Rui, Zhaoyin Wen, Qingsong Wang, Jun Jin, Tao Zhang, Tian Wu

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

21 Scopus citations

Abstract

The spherical pyrite FeS₂ was synthesized through a green and simple method with the addition of the polyvinylpyrrolidone (PVP) dispersant. The as-prepared FeS₂ displays a good electrochemical performance with an initial specific capacity over 80% of the theoretical value and a very low decay rate of 0.33% per cycle (calculated from 2nd to 50th at 0.1 C). Rate capability testing exhibits discharge capacities of around 371.6 mAh/g (0.1 C), 343 mAh/g (0.2 C), 294.9 mAh/g (0.5 C), 239 mAh/g (1 C) and 161.8 mAh/g (2 C) respectively. Besides, coulombic efficiency close to 100% at various rates can also be obtained. We calculate Li⁺ diffusion coefficient and multi-electron feature of the pyrite FeS₂ during charge/discharge process. It shows that smaller potential window is beneficial for cyclability, which was in good agreement with experimental results.

Original language	English
Pages (from-to)	47-52
Number of pages	6
Journal	Solid State Ionics
Volume	290
DOIs	https://doi.org/10.1016/j.ssi.2016.04.005
State	Published - 1 Jul 2016
Externally published	Yes

Keywords

Electrode materials
FeS
Lithium battery
PVP

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10.1016/j.ssi.2016.04.005

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title = "FeS2 microsphere as cathode material for rechargeable lithium batteries",

abstract = "The spherical pyrite FeS2 was synthesized through a green and simple method with the addition of the polyvinylpyrrolidone (PVP) dispersant. The as-prepared FeS2 displays a good electrochemical performance with an initial specific capacity over 80% of the theoretical value and a very low decay rate of 0.33% per cycle (calculated from 2nd to 50th at 0.1 C). Rate capability testing exhibits discharge capacities of around 371.6 mAh/g (0.1 C), 343 mAh/g (0.2 C), 294.9 mAh/g (0.5 C), 239 mAh/g (1 C) and 161.8 mAh/g (2 C) respectively. Besides, coulombic efficiency close to 100% at various rates can also be obtained. We calculate Li+ diffusion coefficient and multi-electron feature of the pyrite FeS2 during charge/discharge process. It shows that smaller potential window is beneficial for cyclability, which was in good agreement with experimental results.",

keywords = "Electrode materials, FeS, Lithium battery, PVP",

author = "Yiming Tao and Kun Rui and Zhaoyin Wen and Qingsong Wang and Jun Jin and Tao Zhang and Tian Wu",

note = "Publisher Copyright: {\textcopyright} 2016 Published by Elsevier B.V.",

year = "2016",

month = jul,

day = "1",

doi = "10.1016/j.ssi.2016.04.005",

language = "英语",

volume = "290",

pages = "47--52",

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TY - JOUR

T1 - FeS2 microsphere as cathode material for rechargeable lithium batteries

AU - Tao, Yiming

AU - Rui, Kun

AU - Wen, Zhaoyin

AU - Wang, Qingsong

AU - Jin, Jun

AU - Zhang, Tao

AU - Wu, Tian

PY - 2016/7/1

Y1 - 2016/7/1

N2 - The spherical pyrite FeS2 was synthesized through a green and simple method with the addition of the polyvinylpyrrolidone (PVP) dispersant. The as-prepared FeS2 displays a good electrochemical performance with an initial specific capacity over 80% of the theoretical value and a very low decay rate of 0.33% per cycle (calculated from 2nd to 50th at 0.1 C). Rate capability testing exhibits discharge capacities of around 371.6 mAh/g (0.1 C), 343 mAh/g (0.2 C), 294.9 mAh/g (0.5 C), 239 mAh/g (1 C) and 161.8 mAh/g (2 C) respectively. Besides, coulombic efficiency close to 100% at various rates can also be obtained. We calculate Li+ diffusion coefficient and multi-electron feature of the pyrite FeS2 during charge/discharge process. It shows that smaller potential window is beneficial for cyclability, which was in good agreement with experimental results.

AB - The spherical pyrite FeS2 was synthesized through a green and simple method with the addition of the polyvinylpyrrolidone (PVP) dispersant. The as-prepared FeS2 displays a good electrochemical performance with an initial specific capacity over 80% of the theoretical value and a very low decay rate of 0.33% per cycle (calculated from 2nd to 50th at 0.1 C). Rate capability testing exhibits discharge capacities of around 371.6 mAh/g (0.1 C), 343 mAh/g (0.2 C), 294.9 mAh/g (0.5 C), 239 mAh/g (1 C) and 161.8 mAh/g (2 C) respectively. Besides, coulombic efficiency close to 100% at various rates can also be obtained. We calculate Li+ diffusion coefficient and multi-electron feature of the pyrite FeS2 during charge/discharge process. It shows that smaller potential window is beneficial for cyclability, which was in good agreement with experimental results.

KW - Electrode materials

KW - FeS

KW - Lithium battery

KW - PVP

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U2 - 10.1016/j.ssi.2016.04.005

DO - 10.1016/j.ssi.2016.04.005

M3 - 文章

AN - SCOPUS:84964203424

SN - 0167-2738

VL - 290

SP - 47

EP - 52

JO - Solid State Ionics

JF - Solid State Ionics

ER -

FeS₂ microsphere as cathode material for rechargeable lithium batteries

Abstract

Keywords

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