首页|A Self-Healing and Nonflammable Cross-Linked Network Polymer Electrolyte with the Combination of Hydrogen Bonds and Dynamic Disulfide Bonds for Lithium Metal Batteries

A Self-Healing and Nonflammable Cross-Linked Network Polymer Electrolyte with the Combination of Hydrogen Bonds and Dynamic Disulfide Bonds for Lithium Metal Batteries

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The self-healing solid polymer electrolytes(SHSPEs)can spontaneously eliminate mechanical damages or micro-cracks generated during the assembly or operation of lithium-ion batteries(LIBs),significantly improving cycling performance and extending service life of LIBs.Here,we report a novel cross-linked network SHSPE(PDDP)containing hydrogen bonds and dynamic disulfide bonds with excellent self-healing properties and non-flammability.The combination of hydrogen bonding between urea groups and the metathesis reaction of dynamic disulfide bonds endows PDDP with rapid self-healing capacity at 28 ℃ without external stimulation.Furthermore,the addition of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide(EMIMTFSI)improves the ionic conductivity(1.13 × 10-4 S cm-1 at 28 ℃)and non-flammability of PDDP.The assembled Li/PDDP/LiFePO4 cell exhibits excellent cycling performance with a discharge capacity of 137 mA h g-1 after 300 cycles at 0.2 C.More importantly,the self-healed PDDP can recover almost the same ionic conductivity and cycling performance as the original PDDP.

cross-linked networkdynamic disulfide bondslithium-ion batteriesnonflammableself-healing solid polymer electrolytes

Kai Chen、Yuxue Sun、Xiaorong Zhang、Jun Liu、Haiming Xie

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Department of Chemistry,National & Local United Engineering Laboratory for Power Battery,Northeast Normal University,Changchun 130024,China

R&D Program of Power Batteries with Low Temperature and High Energy,Science and Technology Bureau of ChangchunKey Subject Construction of Physical Chemistry of Northeast Normal UniversityFundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of China

19SS0132412020FZ0072412020FZ00822102020

2023

10.1002/eem2.12568

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(4)
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