A free-standing, self-assembly ternary membrane with high conductivity for lithium-ion batteries

Ting Feng; Feng Wu; Chuan Wu; Xindong Wang; Gensheng Feng; Huiying Yang

doi:10.1016/j.ssi.2012.06.013

A free-standing, self-assembly ternary membrane with high conductivity for lithium-ion batteries

Ting Feng^*, Feng Wu, Chuan Wu, Xindong Wang, Gensheng Feng, Huiying Yang

^*Corresponding author for this work

School of Material Science and Engineering

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

22 Citations (Scopus)

Abstract

A kind of self-assembly ternary membrane, comprising the hyperbranched polyether, PVDF-HFP and ionic liquid, has been successfully prepared, and the resulting polymer electrolytes were fabricated for applications in lithium-ion batteries. The crystallinity and glass transition temperature (T _g) of the prepared polymer electrolytes were found to decrease with increase of the ionic liquid content, which were confirmed by XRD and DSC thermal analysis. The thermal stability and conductivity could be improved with addition of ionic liquid in the polymer electrolyte. The polymer electrolyte membranes were thermally stable at 320 °C, and the ionic conductivity can reach to 1.37 × 10 ^{- 3} S·cm ^{- 1} at room temperature. The electrochemical tests showed that the electrochemical stability of as-prepared polymer electrolyte was up to 4.9 V (vs. Li/Li ⁺), and the Li/LiFePO ₄ cell with the kind of polymer electrolyte delivered the initial discharge capacity of 101.6 mAh·g ^{- 1}.

Original language	English
Pages (from-to)	28-34
Number of pages	7
Journal	Solid State Ionics
Volume	221
DOIs	https://doi.org/10.1016/j.ssi.2012.06.013
Publication status	Published - 3 Aug 2012

Keywords

Hyperbranched polyether
Ionic liquid
Lithium-ion batteries
Membrane
Polymer electrolyte

UN SDGs

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

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10.1016/j.ssi.2012.06.013

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title = "A free-standing, self-assembly ternary membrane with high conductivity for lithium-ion batteries",

abstract = "A kind of self-assembly ternary membrane, comprising the hyperbranched polyether, PVDF-HFP and ionic liquid, has been successfully prepared, and the resulting polymer electrolytes were fabricated for applications in lithium-ion batteries. The crystallinity and glass transition temperature (T g) of the prepared polymer electrolytes were found to decrease with increase of the ionic liquid content, which were confirmed by XRD and DSC thermal analysis. The thermal stability and conductivity could be improved with addition of ionic liquid in the polymer electrolyte. The polymer electrolyte membranes were thermally stable at 320 °C, and the ionic conductivity can reach to 1.37 × 10 - 3 S·cm - 1 at room temperature. The electrochemical tests showed that the electrochemical stability of as-prepared polymer electrolyte was up to 4.9 V (vs. Li/Li +), and the Li/LiFePO 4 cell with the kind of polymer electrolyte delivered the initial discharge capacity of 101.6 mAh·g - 1.",

keywords = "Hyperbranched polyether, Ionic liquid, Lithium-ion batteries, Membrane, Polymer electrolyte",

author = "Ting Feng and Feng Wu and Chuan Wu and Xindong Wang and Gensheng Feng and Huiying Yang",

year = "2012",

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day = "3",

doi = "10.1016/j.ssi.2012.06.013",

language = "English",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - A free-standing, self-assembly ternary membrane with high conductivity for lithium-ion batteries

AU - Feng, Ting

AU - Wu, Feng

AU - Wu, Chuan

AU - Wang, Xindong

AU - Feng, Gensheng

AU - Yang, Huiying

PY - 2012/8/3

Y1 - 2012/8/3

N2 - A kind of self-assembly ternary membrane, comprising the hyperbranched polyether, PVDF-HFP and ionic liquid, has been successfully prepared, and the resulting polymer electrolytes were fabricated for applications in lithium-ion batteries. The crystallinity and glass transition temperature (T g) of the prepared polymer electrolytes were found to decrease with increase of the ionic liquid content, which were confirmed by XRD and DSC thermal analysis. The thermal stability and conductivity could be improved with addition of ionic liquid in the polymer electrolyte. The polymer electrolyte membranes were thermally stable at 320 °C, and the ionic conductivity can reach to 1.37 × 10 - 3 S·cm - 1 at room temperature. The electrochemical tests showed that the electrochemical stability of as-prepared polymer electrolyte was up to 4.9 V (vs. Li/Li +), and the Li/LiFePO 4 cell with the kind of polymer electrolyte delivered the initial discharge capacity of 101.6 mAh·g - 1.

AB - A kind of self-assembly ternary membrane, comprising the hyperbranched polyether, PVDF-HFP and ionic liquid, has been successfully prepared, and the resulting polymer electrolytes were fabricated for applications in lithium-ion batteries. The crystallinity and glass transition temperature (T g) of the prepared polymer electrolytes were found to decrease with increase of the ionic liquid content, which were confirmed by XRD and DSC thermal analysis. The thermal stability and conductivity could be improved with addition of ionic liquid in the polymer electrolyte. The polymer electrolyte membranes were thermally stable at 320 °C, and the ionic conductivity can reach to 1.37 × 10 - 3 S·cm - 1 at room temperature. The electrochemical tests showed that the electrochemical stability of as-prepared polymer electrolyte was up to 4.9 V (vs. Li/Li +), and the Li/LiFePO 4 cell with the kind of polymer electrolyte delivered the initial discharge capacity of 101.6 mAh·g - 1.

KW - Hyperbranched polyether

KW - Ionic liquid

KW - Lithium-ion batteries

KW - Membrane

KW - Polymer electrolyte

UR - http://www.scopus.com/inward/record.url?scp=84863486625&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2012.06.013

DO - 10.1016/j.ssi.2012.06.013

M3 - Article

AN - SCOPUS:84863486625

SN - 0167-2738

VL - 221

SP - 28

EP - 34

JO - Solid State Ionics

JF - Solid State Ionics

ER -

A free-standing, self-assembly ternary membrane with high conductivity for lithium-ion batteries

Abstract

Keywords

UN SDGs

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