High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries

Shuo WANG; Xue ZHANG; Sijie LIU; Chengzhou XIN; Chuanjiao XUE; Felix RICHTER; Liangliang LI; Lizhen FAN; Yuanhua LIN; Yang SHEN; Jürgen JANEK; Ce-Wen NAN

doi:10.1016/j.jmat.2019.12.010

High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries

Shuo WANG, Xue ZHANG, Sijie LIU, Chengzhou XIN, Chuanjiao XUE, Felix RICHTER, Liangliang LI, Lizhen FAN, Yuanhua LIN, Yang SHEN, Jürgen JANEK, Ce-Wen NAN^*

^*Corresponding author for this work

Research output: Journal Publications › Journal Article (refereed) › peer-review

78 Citations (Scopus)

Abstract

Bulk-type all-solid-state batteries (ASSBs) using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety. However, cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode. For achieving high-performance ASSBs, creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential. In this work, we present Li₆PS₅Cl/poly(vinylidene difluoride) (LPSCl/PVDF) composite electrolytes prepared by a slurry method. The influence of the PVDF content on the microstructure, morphology, ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated. Free-standing LPSCl/PVDF membranes with a thickness of 100–120 μm and a high ionic conductivity of about 1·10⁻³ S cm⁻¹ at 25 °C are obtained. After adding PVDF to the LPSCl electrolyte, the cycling stability of the LPSCl electrolyte against lithium metal improves significantly. Therefore, LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs.

Original language	English
Pages (from-to)	70-76
Number of pages	7
Journal	Journal of Materiomics
Volume	6
Issue number	1
Early online date	26 Dec 2019
DOIs	https://doi.org/10.1016/j.jmat.2019.12.010
Publication status	Published - 1 Mar 2020
Externally published	Yes

Funding

This work was supported by the Basic Science Center Program of NSFC under Grant No. 51788104 and NSFC projects under Grant Nos. 51532002 , 51572141 , and 51625202. JJ and FR acknowledge financial support within the project 03XP0177A funded by BMBF with the cluster of competence FESTBATT.

Keywords

Composite solid electrolyte
Li6PS5Cl
Poly(vinylidene difluoride)

UN SDGs

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

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Cite this

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title = "High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries",

abstract = "Bulk-type all-solid-state batteries (ASSBs) using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety. However, cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode. For achieving high-performance ASSBs, creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential. In this work, we present Li6PS5Cl/poly(vinylidene difluoride) (LPSCl/PVDF) composite electrolytes prepared by a slurry method. The influence of the PVDF content on the microstructure, morphology, ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated. Free-standing LPSCl/PVDF membranes with a thickness of 100–120 μm and a high ionic conductivity of about 1·10−3 S cm−1 at 25 °C are obtained. After adding PVDF to the LPSCl electrolyte, the cycling stability of the LPSCl electrolyte against lithium metal improves significantly. Therefore, LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs.",

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author = "Shuo WANG and Xue ZHANG and Sijie LIU and Chengzhou XIN and Chuanjiao XUE and Felix RICHTER and Liangliang LI and Lizhen FAN and Yuanhua LIN and Yang SHEN and J{\"u}rgen JANEK and Ce-Wen NAN",

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T1 - High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries

AU - WANG, Shuo

AU - ZHANG, Xue

AU - LIU, Sijie

AU - XIN, Chengzhou

AU - XUE, Chuanjiao

AU - RICHTER, Felix

AU - LI, Liangliang

AU - FAN, Lizhen

AU - LIN, Yuanhua

AU - SHEN, Yang

AU - JANEK, Jürgen

AU - NAN, Ce-Wen

PY - 2020/3/1

Y1 - 2020/3/1

N2 - Bulk-type all-solid-state batteries (ASSBs) using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety. However, cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode. For achieving high-performance ASSBs, creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential. In this work, we present Li6PS5Cl/poly(vinylidene difluoride) (LPSCl/PVDF) composite electrolytes prepared by a slurry method. The influence of the PVDF content on the microstructure, morphology, ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated. Free-standing LPSCl/PVDF membranes with a thickness of 100–120 μm and a high ionic conductivity of about 1·10−3 S cm−1 at 25 °C are obtained. After adding PVDF to the LPSCl electrolyte, the cycling stability of the LPSCl electrolyte against lithium metal improves significantly. Therefore, LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs.

AB - Bulk-type all-solid-state batteries (ASSBs) using sulfide solid electrolyte are considered as a promising alternative to commercial lithium-ion batteries owing to their high energy density and safety. However, cell energy density is often comparatively low due to use of a thick solid electrolyte separator and a lithium alloy as anode. For achieving high-performance ASSBs, creating a thin free-standing electrolyte with high-conductivity and good cycling stability against lithium anode is essential. In this work, we present Li6PS5Cl/poly(vinylidene difluoride) (LPSCl/PVDF) composite electrolytes prepared by a slurry method. The influence of the PVDF content on the microstructure, morphology, ionic conductivity and activation energy of the LPSCl/PVDF electrolytes is systematically investigated. Free-standing LPSCl/PVDF membranes with a thickness of 100–120 μm and a high ionic conductivity of about 1·10−3 S cm−1 at 25 °C are obtained. After adding PVDF to the LPSCl electrolyte, the cycling stability of the LPSCl electrolyte against lithium metal improves significantly. Therefore, LPSCl/PVDF composite electrolytes are promising candidates to be used in ASSBs.

KW - Composite solid electrolyte

KW - Li6PS5Cl

KW - Poly(vinylidene difluoride)

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High-conductivity free-standing Li6PS5Cl/poly(vinylidene difluoride) composite solid electrolyte membranes for lithium-ion batteries

Abstract

Funding

Keywords

UN SDGs

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