Covalent-Organic-Framework-Based Li-CO Batteries.

Clicks: 218
ID: 104552
2019
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Abstract
Covalent organic frameworks (COFs) are an emerging class of porous crystalline materials constructed from designer molecular building blocks that are linked and extended periodically via covalent bonds. Their high stability, open channels, and ease of functionalization suggest that they can function as a useful cathode material in reversible lithium batteries. Here, a COF constructed from hydrazone/hydrazide-containing molecular units, which shows good CO sequestration properties, is reported. The COF is hybridized to Ru-nanoparticle-coated carbon nanotubes, and the composite is found to function as highly efficient cathode in a Li-CO battery. The robust 1D channels in the COF serve as CO and lithium-ion-diffusion channels and improve the kinetics of electrochemical reactions. The COF-based Li-CO battery exhibits an ultrahigh capacity of 27 348 mAh g at a current density of 200 mA g , and a low cut-off overpotential of 1.24 V within a limiting capacity of 1000 mAh g . The rate performance of the battery is improved considerably with the use of the COF at the cathode, where the battery shows a slow decay of discharge voltage from a current density of 0.1 to 4 A g . The COF-based battery runs for 200 cycles when discharged/charged at a high current density of 1 A g .
Reference Key
li2019covalentorganicframeworkbasedadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Xing;Wang, Hui;Chen, Zhongxin;Xu, Hai-Sen;Yu, Wei;Liu, Cuibo;Wang, Xiaowei;Zhang, Kun;Xie, Keyu;Loh, Kian Ping;
Journal advanced materials (deerfield beach, fla)
Year 2019
DOI
10.1002/adma.201905879
URL
Keywords
covalent organic frameworks co2 collectors li-co2 batteries gas/ion diffusors

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