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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >UV-curable PVdF-HFP-based gel electrolytes with semi-interpenetrating polymer network for dendrite-free Lithium metal batteries
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UV-curable PVdF-HFP-based gel electrolytes with semi-interpenetrating polymer network for dendrite-free Lithium metal batteries

机译：基于UV固化的PVDF-HFP基凝胶电解质，具有半互穿的锂金属电池的半互穿聚合物网络

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摘要

The gel polymer electrolytes have attracted great attention due to their potential in uniform deposition of lithium, formation of stable SEI, nontoxicity, non-flammability and no leakage. In this work, the PVdF-HFP based gel polymer electrolytes are synthesized by UV-curing method, and the PEGMA and PEGDA are employed to enhance the mechanical properties of the electrolyte by forming 3D semi-interpenetrating polymer network. The PVdF-based gel polymer electrolyte with high ionic conductivity of 4.13 x 10(-3) s/cm at room temperature shows superior cycling (140mAh g(-1) at 0.5C after 200 cycles) and rate performance (142 mAh g(-1) at 0.1C, 123 mAh g(-1) at 1C and 90 mAh g(-1) at 2C) when LiFePO4 is used as cathode materials. Moreover, the PVdF-based gel polymer electrolyte displays promising performance under high voltage when the NCM523 is selected as cathode materials (136mAh g(-1) at 0.5C after 50 cycles). The excellent electrochemical performance as well as high ionic conductivity of the electrolyte may be ascribed to the remarkable liquid absorbing ratio of PVdF-HFP and the 3D cross-linking structure with semi-interpenetrating polymer network formed during UV-curing process.
机译：由于它们在锂锂均匀沉积，稳定的SEI，无毒性，不易燃性和无泄漏的潜力，凝胶聚合物电解质引起了极大的关注。在这项工作中，通过UV固化方法合成PVDF-HFP基凝胶聚合物电解质，并且PEGMA和PEGDA通过形成3D半互穿聚合物网络来增强电解质的机械性能。在室温下具有4.13×10（-3）S / cm的高离子电导率的PVDF基凝胶聚合物电解质显示出优异的循环（140mAhg（-1）在200℃下的0.5℃）和速率性能（142mAhg（ - 当LiFePO4用作阴极材料时，在2℃下在0.1℃，123mAhg（-1）时，在2℃下为0.1℃，123mAhg（-1）。此外，基于PVDF的凝胶聚合物电解质在选择NCM523作为阴极材料（50℃下的0.5℃时的阴极材料（136mAhg（-1）时显示出令人无希望的性能。优异的电化学性能以及电解质的高离子电导率可以与在UV固化过程中形成的半互穿聚合物网络的PVDF-HFP和3D交联结构的显着液体吸收比。

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