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An interweaving 3D ion-conductive network binder for high-loading and lean-electrolyte lithium-sulfur batteries

Chen, Jing ; Geng, Xin ; Wang, Chenyang ; Hou, Xu LU orcid ; Wang, Hailong ; Rong, Qinlang ; Sun, Nuo ; Liu, Wei ; Hu, Linyu and Fu, Xiaowei , et al. (2024) In Journal of Materials Chemistry A 12(18). p.11038-11048
Abstract

The binder plays a crucial role in maintaining the integrity and enhancing the conductivity of the electrode, although it accounts for a small weight fraction in the entire electrode. However, the conventional binder used in lithium-sulfur (Li-S) batteries fails to effectively tackle the challenges posed by the shuttle effect of lithium polysulfides, as well as the issues of poor conductivity and volume expansion of sulfur. These limitations greatly hinder the performance and overall efficiency of Li-S batteries. In this study, a waterborne polyurethane binder with lithium-ion (Li-ion) conductivity and an elastic 3D network structure is synthesized, integrating a diverse range of functional groups. The polyethylene glycol in the... (More)

The binder plays a crucial role in maintaining the integrity and enhancing the conductivity of the electrode, although it accounts for a small weight fraction in the entire electrode. However, the conventional binder used in lithium-sulfur (Li-S) batteries fails to effectively tackle the challenges posed by the shuttle effect of lithium polysulfides, as well as the issues of poor conductivity and volume expansion of sulfur. These limitations greatly hinder the performance and overall efficiency of Li-S batteries. In this study, a waterborne polyurethane binder with lithium-ion (Li-ion) conductivity and an elastic 3D network structure is synthesized, integrating a diverse range of functional groups. The polyethylene glycol in the polyurethane binder significantly enhances the Li-ion conductivity due to its abundant electronegative oxygen atoms, consequently reducing the need for electrolyte. The presence of multi-functional polar groups endows the polymer binder with notable adsorption capability, effectively mitigating the undesirable shuttle effect. The 3D network formed by the crosslinking reaction between polyurethane and the aziridine crosslinker enables the accommodation of volume expansion during cycling. Benefitting from these characteristics, the designed waterborne binder endows the Li-S batteries with improved long-cycle stability and rate capability compared to polyethylene oxide and polyvinylidene fluoride binders under lean electrolyte conditions.

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publishing date
type
Contribution to journal
publication status
published
in
Journal of Materials Chemistry A
volume
12
issue
18
pages
11 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85190132550
ISSN
2050-7488
DOI
10.1039/d4ta00451e
language
English
LU publication?
no
additional info
Publisher Copyright: © 2024 The Royal Society of Chemistry.
id
7cbb9d41-2250-43d4-85c5-cfed13f38fb3
date added to LUP
2025-12-05 22:25:29
date last changed
2025-12-09 14:59:40
@article{7cbb9d41-2250-43d4-85c5-cfed13f38fb3,
  abstract     = {{<p>The binder plays a crucial role in maintaining the integrity and enhancing the conductivity of the electrode, although it accounts for a small weight fraction in the entire electrode. However, the conventional binder used in lithium-sulfur (Li-S) batteries fails to effectively tackle the challenges posed by the shuttle effect of lithium polysulfides, as well as the issues of poor conductivity and volume expansion of sulfur. These limitations greatly hinder the performance and overall efficiency of Li-S batteries. In this study, a waterborne polyurethane binder with lithium-ion (Li-ion) conductivity and an elastic 3D network structure is synthesized, integrating a diverse range of functional groups. The polyethylene glycol in the polyurethane binder significantly enhances the Li-ion conductivity due to its abundant electronegative oxygen atoms, consequently reducing the need for electrolyte. The presence of multi-functional polar groups endows the polymer binder with notable adsorption capability, effectively mitigating the undesirable shuttle effect. The 3D network formed by the crosslinking reaction between polyurethane and the aziridine crosslinker enables the accommodation of volume expansion during cycling. Benefitting from these characteristics, the designed waterborne binder endows the Li-S batteries with improved long-cycle stability and rate capability compared to polyethylene oxide and polyvinylidene fluoride binders under lean electrolyte conditions.</p>}},
  author       = {{Chen, Jing and Geng, Xin and Wang, Chenyang and Hou, Xu and Wang, Hailong and Rong, Qinlang and Sun, Nuo and Liu, Wei and Hu, Linyu and Fu, Xiaowei and Lei, Jingxin and Liu, Zhimeng and He, Xin}},
  issn         = {{2050-7488}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{18}},
  pages        = {{11038--11048}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry A}},
  title        = {{An interweaving 3D ion-conductive network binder for high-loading and lean-electrolyte lithium-sulfur batteries}},
  url          = {{http://dx.doi.org/10.1039/d4ta00451e}},
  doi          = {{10.1039/d4ta00451e}},
  volume       = {{12}},
  year         = {{2024}},
}