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The suppression of lithium dendrites by a triazine-based porous organic polymer-laden PEO-based electrolyte and its application for all-solid-state lithium batteries
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020/01/16 , DOI: 10.1039/c9qm00707e N. Angulakshmi 1, 2, 3, 4, 5 , R. Baby Dhanalakshmi 6, 7, 8 , Murugavel Kathiresan 6, 7, 8 , Yingke Zhou 1, 2, 3, 4, 5 , A. Manuel Stephan 6, 7, 8
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020/01/16 , DOI: 10.1039/c9qm00707e N. Angulakshmi 1, 2, 3, 4, 5 , R. Baby Dhanalakshmi 6, 7, 8 , Murugavel Kathiresan 6, 7, 8 , Yingke Zhou 1, 2, 3, 4, 5 , A. Manuel Stephan 6, 7, 8
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A triazene-p-phenylenediamine-based porous organic polymer (TP-POP) was successfully synthesized and incorporated as a filler in the PEO + LiTFSI matrix. The composite polymer electrolyte (CPE) membranes were characterized via SEM, DSC, TGA and tensile studies. Their electrochemical properties including ionic conductivity and compatibility and dendrite features were also investigated. The ionic conductivity increased by one order magnitude upon the addition of 2 wt% of TP-POP in the polymeric matrix, which was attributed to the formation of a transition Lewis acid–base-type of interaction for Li+-ion hopping. The CPE comprising PEO + LiTFSI + TP-POP exhibited not only higher thermal stability and better interfacial properties but also prevented dendrite growth even after 140 h. Finally, a 2032-type coin cell composed of LiFePO4/CPE/Li was assembled and its cycling performance was analysed for different C rates at 60 °C. Stable cycling was achieved even at the rate of 1C.
中文翻译：
含三嗪基多孔有机聚合物的PEO基电解质对锂枝晶的抑制及其在全固态锂电池中的应用
成功地合成了基于三嗪-对-苯二胺的多孔有机聚合物（TP-POP），并将其作为填料并入PEO + LiTFSI基质中。通过SEM，DSC，TGA和拉伸研究对复合聚合物电解质（CPE）膜进行了表征。还研究了它们的电化学性能，包括离子电导率和相容性以及枝晶特征。在聚合物基质中添加2 wt％的TP-POP后，离子电导率增加了一个数量级，这归因于Li +形成过渡路易斯酸-碱型相互作用离子跳跃。包含PEO + LiTFSI + TP-POP的CPE不仅表现出更高的热稳定性和更好的界面性能，而且即使在140 h后仍可防止枝晶生长。最后，组装了由LiFePO 4 / CPE / Li组成的2032型纽扣电池，并在60°C下针对不同的C速率分析了其循环性能。即使以1C的速率也能实现稳定的循环。
更新日期：2020-03-05
中文翻译：
含三嗪基多孔有机聚合物的PEO基电解质对锂枝晶的抑制及其在全固态锂电池中的应用
成功地合成了基于三嗪-对-苯二胺的多孔有机聚合物（TP-POP），并将其作为填料并入PEO + LiTFSI基质中。通过SEM，DSC，TGA和拉伸研究对复合聚合物电解质（CPE）膜进行了表征。还研究了它们的电化学性能，包括离子电导率和相容性以及枝晶特征。在聚合物基质中添加2 wt％的TP-POP后，离子电导率增加了一个数量级，这归因于Li +形成过渡路易斯酸-碱型相互作用离子跳跃。包含PEO + LiTFSI + TP-POP的CPE不仅表现出更高的热稳定性和更好的界面性能，而且即使在140 h后仍可防止枝晶生长。最后，组装了由LiFePO 4 / CPE / Li组成的2032型纽扣电池，并在60°C下针对不同的C速率分析了其循环性能。即使以1C的速率也能实现稳定的循环。
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