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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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Energy & Environmental Materials 2023年第4期6卷 106-113页

作者： Kai Chen Yuxue Sun Xiaorong Zhang Jun Liu Haiming Xie Department of Chemistry National&Local United Engineering Laboratory for Power BatteryNortheast Normal UniversityChangchun 130024China

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 ***,we report a novel cross-linked network SHSPE(PDDP)containing hydrogen bonds and dynamic disulfide bonds with excellent self-healing properties and *** combination of hydrogen bonding between urea groups and the metathesis reaction of dynamic disulfide bonds endows PDDP with rapid self-healing capacity at 28°C without external ***,the addition of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide(EMIMTFSI)improves the ionic conductivity(1.13×10^(−4)S cm^(−1)at 28°C)and non-flammability of *** assembled Li/PDDP/LiFePO_(4)cell exhibits excellent cycling performance with a discharge capacity of 137 mA h g^(−1)after 300 cycles at 0.2 *** importantly,the self-healed PDDP can recover almost the same ionic conductivity and cycling performance as the original PDDP.

关键词： cross-linked network dynamic disulfide bonds lithium-ion batteries nonflammable self-healing solid polymer electrolytes

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Thermally Conductive Study of Polyethylene/Al2O3 Composite networks cross-linked by Electron Beam Irradiation

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Chemical Research in Chinese Universities 2020年第5期36卷 940-945页

作者： SHI Chengying YANG Jiayu LIU Yang WANG Yanmiao XU Wenge XU Yiquan HU Wei LIU Baijun Key Laboratory of High Performance Plastics Ministry of EducationNational&Local Joint Engineering Laboratory for Synthesis Technology of High Performance PolymerCollege of CheniistiyJilin UniversityChangchun 130012P.R.China Changchun Radiation Technology Co. Ltd.China Isotope&Radiation Corporation(CIRC)Changchun 130102P.R.China Changchun Kinwa High Technology Co. Ltd.Changchun 130102P.R.China Key Laboratory of Polyoxonietalate Science Kfinistiy of EducationFaculty of ChemistryNortheast Normal UniversityChangchun 130024P.R.China

The surface-modifled Al2O3 particles were introduced into polyethylene(PE)to enhance the thermal conductivity,and PE/Al2O3 cross-linked networks with improved thermal and mechanical properties were prepared through electron beam(EB)irradiation *** incorporation of reactive irradiation sensitizer was useful in fabricating a high degree of cross-linking(DC)PE networks under a low irradiation *** the PE sample containing 2%sensitizer,DC ca.67.1%could be obtained under 60 kGy(1 kGy=1000 J/kg).EB-irradiation greatly improved thetensile stress of PE-based samples,and the tensile stresses of the samples with 0.2—5%TMPTA(trimethylolpr pane triacrvlate)under 60 kGy were 24.61—27.77 *** the EB-irradiated samples had higher Vicat softening temperatures than the samples without *** treatment at 120 kGy,the Vicat softening temperatures of PE-Al2O3-44/TMPTA-2 increased from 127℃to 130.4℃.SEM images revealed that PE-Al2O3-5O samples with increased amount of Al2O3 particles showed a conduction"pathway,"and thennal conductivity reached 0.67 W/(m·K).Thus,high-performance pipes were extruded,which could satisfy the static hydraulic blasting test and exhibit improved thennal conduction capability.

关键词： Electron beam(EB)-irradiation cross-linked network Thermal conductivity

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