首页|Observation of high ionic conductivity of polyelectrolyte microgels in salt-free solutions

Observation of high ionic conductivity of polyelectrolyte microgels in salt-free solutions

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Here,we report an observation that illustrate the potential of polyelectrolyte microgels in salt-free solu-tions to display a high ionic conductivity.Laser light scattering and ionic conductivity tests on very di-lute aqueous dispersions of the microgels indicate that both small size and swollen state of gel particles play vital roles,which should favor the counterions to freely penetrate and leave gel particles,and thus can contribute to the ion-conducting property.Upon discovering this on microgels that are composed of imidazolium-based poly(ionic liquid),we also illustrate the generality of the finding to single lithium-ion polyelectrolyte microgels that are of more technically relevant features for applications,for instance,as injectable liquid"microgel-in-solution"electrolytes of high conductivity(ca.8.2 × 10-2 S/m at 25.0 ℃ for 1.0 × 10-2 g/mL of microgels in a LiNO3-free 1∶1 v/v mixture of 1,2-dioxolane and dimethoxymethane)and high lithium-ion transference number(0.87)for use in the rechargeable lithium-sulfur battery.

PolyelectrolhyteStimuli-responsiveSingle-ion conductingLiquid electrolyteLithium metal battery

Qiangwei Wang、Huijiao Liu、Mengjie Wang、Haojie Zhang、Jianda Xie、Xuanwei Hu、Shiming Zhou、Weitai Wu

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State Key Laboratory for Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,The Key Laboratory for Chemical Biology of Fujian Province,and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China

School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,China

Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China

School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China

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国家自然科学基金国家自然科学基金Chuying Plan Youth Top-notch Talents of Fujian ProvinceNational Fund for Fostering Talents of Basic Science

2177410520923004J1310024

2024

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子:0.771
ISSN:1001-8417
年,卷(期):2024.35(4)
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