Nanocomposite of Conducting Polymer and Li Metal for Rechargeable High Energy Density Batteries

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Nanocomposite of Conducting Polymer and Li Metal for Rechargeable High Energy Density Batteries
Title:
Nanocomposite of Conducting Polymer and Li Metal for Rechargeable High Energy Density Batteries
Journal Title:
ACS Applied Materials & Interfaces
Publication Date:
11 August 2022
Citation:
Wang, L., Wang, X., Zhan, R., Chen, Z., Tu, S., Li, C., Liu, X., Seh, Z. W., & Sun, Y. (2022). Nanocomposite of Conducting Polymer and Li Metal for Rechargeable High Energy Density Batteries. ACS Applied Materials & Interfaces, 14(33), 37709–37715. https://doi.org/10.1021/acsami.2c07917
Abstract:
The structure and electrochemical performance of lithium (Li) metal degrade quickly owing to its hostless nature and high reactivity, hindering its practical application in rechargeable high energy density batteries. In order to enhance the electrochemical reversibility of metallic Li, we designed a Li/Li2S-poly(acrylonitrile) (LSPAN) composite foil via a facile mechanical kneading approach using metallic Li and sulfurized poly(acrylonitrile) as the raw materials. The uniformly dispersed Li2S-poly(acrylonitrile) (Li2S-PAN) in a metallic Li matrix buffered the volume change on cycling, and its high Li ion conductivity enabled fast Li ion diffusion behavior of the composite electrode. As expected, the LSPAN electrode showed reduced voltage polarization, enhanced rate capability, and prolonged cycle life compared with the pure Li electrode. It exhibited stable cycling for 600 h with a symmetric cell configuration at 1 mA cm–2 and 1 mA h cm–2, far outperforming the pure metallic Li counterpart (400 h). Also, the LiCoO2||LSPAN full cells with a cathode mass loading of ∼16 mg cm–2 worked stably for 100 cycles at 0.5 C with a high capacity retention of 96.5%, while the LiCoO2||Li full cells quickly failed within only 50 cycles.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation - NRF Fellowship
Grant Reference no. : NRF-NRFF2017-04

This research is supported by core funding from: SERC
Grant Reference no. : Central Research Fund Award
Description:
This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see doi.org/10.1021/acsami.2c07917
ISSN:
1944-8252
1944-8244
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