Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode

Qiuyan Liu; Shiwei Xu; Xiaoyun Li; Renjie Chen; Xuefeng Wang; Yurui Gao; Zhaoxiang Wang; Liquan Chen

doi:10.1021/acs.nanolett.2c04898

Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode

Qiuyan Liu, Shiwei Xu, Xiaoyun Li, Renjie Chen, Xuefeng Wang^*, Yurui Gao^*, Zhaoxiang Wang^*, Liquan Chen

^*Corresponding author for this work

School of Material Science and Engineering

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

6 Citations (Scopus)

Abstract

Polymer electrolytes have been studied as an alternative to organic liquid electrolytes but suffer from low ionic conductivity. Propylene carbonate (PC) proves to be an interesting solvent but is incompatible with graphitic anodes due to its cointercalation effect. In this work, adding poly(ethylene oxide) (PEO) into a PC-based electrolyte can alter the solvation structure as well as transform the solution into a polymer electrolyte with high ionic conductivity. By spectroscopic techniques and calculations, we demonstrate that PEO can compete with PC in solvating the Li⁺ ions, reducing the Li⁺-PC bond strength, and making it easier for PC to be desolvated. Due to the unique solvation structure, PC-cointercalation-induced graphite exfoliation is inhibited, and the reduction stability of the electrolyte is improved. This work will extend the applications of the PC-based electrolytes, deepen the understandings of the solvation structure, and spur designs of advanced electrolytes.

Original language	English
Pages (from-to)	2623-2629
Number of pages	7
Journal	Nano Letters
Volume	23
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.2c04898
Publication status	Published - 12 Apr 2023

Keywords

cointercalation
graphite
propylene-carbonate-based electrolyte
solvation

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10.1021/acs.nanolett.2c04898

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title = "Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode",

abstract = "Polymer electrolytes have been studied as an alternative to organic liquid electrolytes but suffer from low ionic conductivity. Propylene carbonate (PC) proves to be an interesting solvent but is incompatible with graphitic anodes due to its cointercalation effect. In this work, adding poly(ethylene oxide) (PEO) into a PC-based electrolyte can alter the solvation structure as well as transform the solution into a polymer electrolyte with high ionic conductivity. By spectroscopic techniques and calculations, we demonstrate that PEO can compete with PC in solvating the Li+ ions, reducing the Li+-PC bond strength, and making it easier for PC to be desolvated. Due to the unique solvation structure, PC-cointercalation-induced graphite exfoliation is inhibited, and the reduction stability of the electrolyte is improved. This work will extend the applications of the PC-based electrolytes, deepen the understandings of the solvation structure, and spur designs of advanced electrolytes.",

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T1 - Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode

AU - Liu, Qiuyan

AU - Xu, Shiwei

AU - Li, Xiaoyun

AU - Chen, Renjie

AU - Wang, Xuefeng

AU - Gao, Yurui

AU - Wang, Zhaoxiang

AU - Chen, Liquan

PY - 2023/4/12

Y1 - 2023/4/12

N2 - Polymer electrolytes have been studied as an alternative to organic liquid electrolytes but suffer from low ionic conductivity. Propylene carbonate (PC) proves to be an interesting solvent but is incompatible with graphitic anodes due to its cointercalation effect. In this work, adding poly(ethylene oxide) (PEO) into a PC-based electrolyte can alter the solvation structure as well as transform the solution into a polymer electrolyte with high ionic conductivity. By spectroscopic techniques and calculations, we demonstrate that PEO can compete with PC in solvating the Li+ ions, reducing the Li+-PC bond strength, and making it easier for PC to be desolvated. Due to the unique solvation structure, PC-cointercalation-induced graphite exfoliation is inhibited, and the reduction stability of the electrolyte is improved. This work will extend the applications of the PC-based electrolytes, deepen the understandings of the solvation structure, and spur designs of advanced electrolytes.

AB - Polymer electrolytes have been studied as an alternative to organic liquid electrolytes but suffer from low ionic conductivity. Propylene carbonate (PC) proves to be an interesting solvent but is incompatible with graphitic anodes due to its cointercalation effect. In this work, adding poly(ethylene oxide) (PEO) into a PC-based electrolyte can alter the solvation structure as well as transform the solution into a polymer electrolyte with high ionic conductivity. By spectroscopic techniques and calculations, we demonstrate that PEO can compete with PC in solvating the Li+ ions, reducing the Li+-PC bond strength, and making it easier for PC to be desolvated. Due to the unique solvation structure, PC-cointercalation-induced graphite exfoliation is inhibited, and the reduction stability of the electrolyte is improved. This work will extend the applications of the PC-based electrolytes, deepen the understandings of the solvation structure, and spur designs of advanced electrolytes.

KW - cointercalation

KW - graphite

KW - propylene-carbonate-based electrolyte

KW - solvation

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DO - 10.1021/acs.nanolett.2c04898

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SN - 1530-6984

VL - 23

SP - 2623

EP - 2629

JO - Nano Letters

JF - Nano Letters

IS - 7

ER -

Polymer Competitive Solvation Reduced Propylene Carbonate Cointercalation in a Graphitic Anode

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Keywords

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