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首页> 外文期刊>Advanced Functional Materials >Direct Ink Writing of Polymer Composite Electrolytes with Enhanced Thermal Conductivities
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Direct Ink Writing of Polymer Composite Electrolytes with Enhanced Thermal Conductivities

机译：具有增强的热导流性的聚合物复合电解质的直接墨水写入

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摘要

Proper distribution of thermally conductive nanomaterials in polymer batteries offers new opportunities to mitigate performance degradations associated with local hot spots and safety concerns in batteries. Herein, a direct ink writing (DIW) method is utilized to fabricate polyethylene oxide (PEO) composite polymers electrolytes (CPE) embedded with silane-treated hexagonal boron nitride (S-hBN) platelets and free of any volatile organic solvents. It is observed that the S-hBN platelets are well aligned in the printed CPE during the DIW process. The in-plane thermal conductivity of the printed CPE with the aligned S-hBN platelets is 1.031 W-1K-1, which is about 1.7 times that of the pristine CPE with the randomly dispersed S-hBN platelets (0.612 W-1K-1). Thermal imaging shows that the peak temperature (degrees C) of the printed electrolytes is 24.2% lower than that of the CPE without S-hBN, and 10.6% lower than that of the CPE with the randomly dispersed S-hBN, indicating a superior thermal transport property. Lithium-ion half-cells made with the printed CPE and LiFePO(4)cathode displayed high specific discharge capacity of 146.0 mAh g(-1)and stable Coulombic efficiency of 91% for 100 cycles at room temperature. This work facilitates the development of printable thermally-conductive polymers for safer battery operations.
机译：高分子电池中的热导电纳米材料的适当分布提供了利用与当地热点和电池安全问题相关的性能降级的新机会。这里，使用直接墨水写入（DIW）方法来制造嵌入嵌入硅烷处理的六边形氮化硼（S-HBN）血小板的聚环氧乙烷（PEO）复合聚合物电解质（CPE），并没有任何挥发性有机溶剂。观察到在DIW工艺期间，S-HBN血小板在印刷CPE中很好地对准。用对齐的S-HBN血小板的印刷CPE的面内导热率为1.031W-1K-1，其具有随机分散的S-HBN血小板（0.612 W-1K-1的原始CPE的约1.7倍） ）。热成像表明，印刷电解质的峰值温度（℃）低于没有S-HBN的CPE的24.2％，与随机分散的S-HBN的CPE低10.6％，表明优越的热量运输财产。用印刷CPE和LiFePo（4）阴极制成的锂离子半电池显示出高比放电容量为146.0mAhg（-1），并且在室温下为100个循环的稳定库仑效率为91％。这项工作有助于开发可打印的导热聚合物，用于更安全的电池操作。

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