In Situ Copolymerizated Gel Polymer Electrolyte with Cross-Linked Network for Sodium-Ion Batteries,CCS Chemistry

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In Situ Copolymerizated Gel Polymer Electrolyte with Cross-Linked Network for Sodium-Ion Batteries
CCS Chemistry ( IF 9.4 ) Pub Date : 2019-12-09 , DOI: 10.31635/ccschem.019.201900055
Yu-Bin Niu ₁ , Ya-Xia Yin _{1,

2} , Wen-Peng Wang _{1,

2} , Peng-Fei Wang _{1,

2} , Wei Ling ₁ , Yao Xiao ₁ , Yu-Guo Guo _{1,

2}

Affiliation

High thermal stability, nonflammability, and no liquid leakage are indispensable capabilities for electrolytes in sodium-ion batteries toward large-scale energy storage systems. The use of solid-state or gel polymer electrolytes has proven to be one of the enabling tools to bring about these advancements; however, their application suffer from tedious synthesis procedure and/or low ionic transport to ensure a battery operation. Herein, a novel gel polymer electrolyte with a cross-linked polyether network (GPE-CPN) was crafted through a self-catalyzed strategy, where in situ copolymerization of two monomers, 1,3-dioxolane and trimethylolpropane triglycidyl ether is realized successfully, with the use of sodium hexafluorophosphate (NaPF6) as an initiator, at room temperature. We demonstrate that the resultant GPE-CPN possesses a superior electrochemical stability window up to 4 V versus Na+ /Na, a considerable ionic conductivity, of 8.2 × 10−4 S cm−1 at room temperature, which is a capability good enough to suppress the growth of sodium dendrites and thus, stabilize the interface of electrolyte/ sodium anode. Considering the benefit from its facile fabrication and superior characteristics, the asgenerated GPE-CPN reveals a potential application for future recharg

中文翻译：

具有交联网络的钠离子电池原位共聚凝胶聚合物电解质

高热稳定性，不可燃性和无液体泄漏是钠离子电池中的电解质向大型能量存储系统不可或缺的能力。固态或凝胶聚合物电解质的使用已被证明是实现这些进步的使能工具之一。然而，它们的应用遭受繁琐的合成过程和/或低离子迁移以确保电池操作的困扰。本文中，通过自催化策略制备了具有交联聚醚网络（GPE-CPN）的新型凝胶聚合物电解质，成功实现了两种单体的原位共聚，即1,3-二氧戊环和三羟甲基丙烷三缩水甘油醚。在室温下使用六氟磷酸钠（NaPF6）作为引发剂。我们证明了所得的GPE-CPN相对于Na + / Na具有高达4 V的优异电化学稳定性窗口，在室温下具有8.2×10-4 S cm-1的相当大的离子电导率，这足以满足要求抑制钠树枝状晶体的生长，从而稳定电解质/钠阳极的界面。考虑到其容易制造和优越特性的益处，生成的GPE-CPN揭示了未来充电的潜在应用

更新日期：2020-06-24

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