Strong affinity of polysulfide intermediates to multi-functional binder for practical application in lithium-sulfur batteries

Hongqiang Wang; Vitor Sencadas; Guoping Gao; Hong Gao; Aijun Du; Huakun Liu; Zaiping Guo

doi:10.1016/j.nanoen.2016.06.036

Strong affinity of polysulfide intermediates to multi-functional binder for practical application in lithium-sulfur batteries

Hongqiang Wang
, Vitor Sencadas
, Guoping Gao
, Hong Gao
, Aijun Du
, Huakun Liu
, Zaiping Guo^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

86 Citations (Scopus)

Abstract

Binder, one of the most important battery components, plays a critical role in lithium-sulfur batteries. Poly(vinylidene difluoride) (PVDF), a commonly used binder in lithium-sulfur batteries, does not have a strong affinity to the intermediate polysulfides, however, leading to fast capacity fading with electrochemical cycling. Herein, copolymers of vinylidene difluoride with other monomers are used as multi-functional binders to enhance the electrochemical performance of lithium-sulfur batteries. Compared to the PVDF, the copolymer, poly(vinylidene difluoride-trifluoroethylene) (P(VDF-TRFE)) binder exhibits higher adhesion strength, less porosity, and stronger chemical interaction with polysulfides, which helps to keep the polysulfides within the cathode region, thereby improving the electrochemical performance of the lithium-sulfur battery. As a result, sulfur electrode with P(VDF-TRFE) binder delivered a high capacity of 801 mA h g^-1 at 0.2 C after 100 cycles, which is nearly 80% higher capacity than the corresponding sulfur cathode with PVDF binder. © 2016 Elsevier Ltd.

Original language	English
Pages (from-to)	722-728
Journal	Nano Energy
Volume	26
DOIs	https://doi.org/10.1016/j.nanoen.2016.06.036
Publication status	Published - 1 Aug 2016
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was supported the Australian Research Council (ARC) through an ARC Discovery project ( DP1094261 ) and ARC-LIEF Grant ( LE0882613 ). The authors also would like to thank Dr Tania Silver for critical reading of the manuscript.

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

Chemical affinity
Copolymer binder
Density functional theory (DFT) calculations
Lithium-sulfur batteries
Polysulfide intermediates

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10.1016/j.nanoen.2016.06.036

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title = "Strong affinity of polysulfide intermediates to multi-functional binder for practical application in lithium-sulfur batteries",

abstract = "Binder, one of the most important battery components, plays a critical role in lithium-sulfur batteries. Poly(vinylidene difluoride) (PVDF), a commonly used binder in lithium-sulfur batteries, does not have a strong affinity to the intermediate polysulfides, however, leading to fast capacity fading with electrochemical cycling. Herein, copolymers of vinylidene difluoride with other monomers are used as multi-functional binders to enhance the electrochemical performance of lithium-sulfur batteries. Compared to the PVDF, the copolymer, poly(vinylidene difluoride-trifluoroethylene) (P(VDF-TRFE)) binder exhibits higher adhesion strength, less porosity, and stronger chemical interaction with polysulfides, which helps to keep the polysulfides within the cathode region, thereby improving the electrochemical performance of the lithium-sulfur battery. As a result, sulfur electrode with P(VDF-TRFE) binder delivered a high capacity of 801 mA h g-1 at 0.2 C after 100 cycles, which is nearly 80\% higher capacity than the corresponding sulfur cathode with PVDF binder. {\textcopyright} 2016 Elsevier Ltd.",

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author = "Hongqiang Wang and Vitor Sencadas and Guoping Gao and Hong Gao and Aijun Du and Huakun Liu and Zaiping Guo",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

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T1 - Strong affinity of polysulfide intermediates to multi-functional binder for practical application in lithium-sulfur batteries

AU - Wang, Hongqiang

AU - Sencadas, Vitor

AU - Gao, Guoping

AU - Gao, Hong

AU - Du, Aijun

AU - Liu, Huakun

AU - Guo, Zaiping

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Binder, one of the most important battery components, plays a critical role in lithium-sulfur batteries. Poly(vinylidene difluoride) (PVDF), a commonly used binder in lithium-sulfur batteries, does not have a strong affinity to the intermediate polysulfides, however, leading to fast capacity fading with electrochemical cycling. Herein, copolymers of vinylidene difluoride with other monomers are used as multi-functional binders to enhance the electrochemical performance of lithium-sulfur batteries. Compared to the PVDF, the copolymer, poly(vinylidene difluoride-trifluoroethylene) (P(VDF-TRFE)) binder exhibits higher adhesion strength, less porosity, and stronger chemical interaction with polysulfides, which helps to keep the polysulfides within the cathode region, thereby improving the electrochemical performance of the lithium-sulfur battery. As a result, sulfur electrode with P(VDF-TRFE) binder delivered a high capacity of 801 mA h g-1 at 0.2 C after 100 cycles, which is nearly 80% higher capacity than the corresponding sulfur cathode with PVDF binder. © 2016 Elsevier Ltd.

AB - Binder, one of the most important battery components, plays a critical role in lithium-sulfur batteries. Poly(vinylidene difluoride) (PVDF), a commonly used binder in lithium-sulfur batteries, does not have a strong affinity to the intermediate polysulfides, however, leading to fast capacity fading with electrochemical cycling. Herein, copolymers of vinylidene difluoride with other monomers are used as multi-functional binders to enhance the electrochemical performance of lithium-sulfur batteries. Compared to the PVDF, the copolymer, poly(vinylidene difluoride-trifluoroethylene) (P(VDF-TRFE)) binder exhibits higher adhesion strength, less porosity, and stronger chemical interaction with polysulfides, which helps to keep the polysulfides within the cathode region, thereby improving the electrochemical performance of the lithium-sulfur battery. As a result, sulfur electrode with P(VDF-TRFE) binder delivered a high capacity of 801 mA h g-1 at 0.2 C after 100 cycles, which is nearly 80% higher capacity than the corresponding sulfur cathode with PVDF binder. © 2016 Elsevier Ltd.

KW - Chemical affinity

KW - Copolymer binder

KW - Density functional theory (DFT) calculations

KW - Lithium-sulfur batteries

KW - Polysulfide intermediates

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DO - 10.1016/j.nanoen.2016.06.036

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VL - 26

SP - 722

EP - 728

JO - Nano Energy

JF - Nano Energy

ER -

Strong affinity of polysulfide intermediates to multi-functional binder for practical application in lithium-sulfur batteries

Abstract

Bibliographical note

Funding

UN SDGs

Research Keywords

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