Solution-Processable Covalent Organic Framework Electrolytes for All-Solid-State Li–Organic Batteries,ACS Energy Letters

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Solution-Processable Covalent Organic Framework Electrolytes for All-Solid-State Li–Organic Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2020-10-21 , DOI: 10.1021/acsenergylett.0c01889
Xing Li ₁ , Qian Hou ₂ , Wei Huang _{2,

3} , Hai-Sen Xu ₁ , Xiaowei Wang ₁ , Wei Yu ₁ , Runlai Li ₁ , Kun Zhang _{1,

2} , Lu Wang ₁ , Zhongxin Chen ₁ , Keyu Xie ₂ , Kian Ping Loh _{1,

3}

Affiliation

Solid electrolytes (SEs) are milestones in the technology roadmaps for safe and high energy density batteries. The design of organic SEs is challenged by the need to have dynamic structural fluidity for ion motion. The presence of well-ordered one-dimensional (1D) channels and stability against phase transition in covalent organic frameworks (COFs) render them potential candidates for low-temperature SEs. Herein, we demonstrate two milestones using hydrazone COF as an SE: it achieves an ion conductivity of 10^–5 S cm^–1 at −40 °C with a Li⁺ transference number of 0.92 and also prevents the dissolution of small organic molecular electrode in all-solid-state batteries. Using 1,4-benzoquinone as the cathode, a lithium battery using hydrazone COF as a SE runs for 500 cycles at a steady current density of 500 mA g^–1 at 20 °C. Considering that hydrazone COF is readily amenable to large-scale production and facile post-synthetic modification, its use in an all-solid-state battery is highly promising.

中文翻译：

适用于全固态锂有机电池的溶液可处理共价有机骨架电解质

固体电解质（SE）是安全和高能量密度电池技术路线图中的里程碑。有机SE的设计面临着离子运动需要动态结构流动性的挑战。共价有机骨架（COF）中存在秩序井然的一维（1D）通道以及对相变的稳定性使其成为低温SE的潜在候选者。在此，我们演示了使用using COF作为SE的两个里程碑：在−40°C的条件下，Li ⁺可以实现10 ^–5 S cm ^–1的离子电导率。迁移数为0.92，还可以防止小的有机分子电极在全固态电池中溶解。使用1,4-苯醌作为阴极，使用COF作为SE的锂电池在20°C下以500 mA g ^–1的稳定电流密度运行500个循环。考虑到CO COF易于进行大规模生产和容易的合成后修饰，在全固态电池中的应用非常有前途。

更新日期：2020-11-13

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