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Title: Solution Processable Covalent Organic Framework Electrolytes for All-Solid-State Li Organic Batteries
Authors: Li, X. 
Hou, Q.
Huang, W.
Xu, H.-S. 
Wang, X. 
Yu, W.
Li, R. 
Zhang, K. 
Wang, L.
Chen, Z. 
Xie, K.
Loh, K.P. 
Issue Date: 21-Oct-2020
Publisher: American Chemical Society
Citation: Li, X., Hou, Q., Huang, W., Xu, H.-S., Wang, X., Yu, W., Li, R., Zhang, K., Wang, L., Chen, Z., Xie, K., Loh, K.P. (2020-10-21). Solution Processable Covalent Organic Framework Electrolytes for All-Solid-State Li Organic Batteries. ACS Energy Letters 5 (11) : 3498?3506. ScholarBank@NUS Repository.
Abstract: Solid electrolytes (SEs) are milestones in the technology roadmaps for safe and high-energy density batteries. The design of organic SE is challenged by the need to have dynamic structural fluidity for ion motion. The presence of well-ordered one-dimensional (1D) channels as well as stability against phase transition in covalent organic frameworks (COFs) render them potential candidates for low-temperature SE. Herein, we demonstrate two milestones using hydrazone COF as SE: it achieves an ion conductivity of 10−5 S cm−1 at −40 ºC 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, lithium battery using hydrazone COF as SE can run for 500 cycles at a steady current density of 500 mA g−1 at 20 ºC. Considering that hydrazone COF is readily amenable to large scale production and facile post-synthetic modification, its use in all solid-state battery is highly promising.
Source Title: ACS Energy Letters
ISSN: 23808195
DOI: 10.1021/acsenergylett.0c01889
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