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Title: Building a spontaneously formed and self-healing protective layer with an F-rich electrochemically active organic molecule for ultra-stable Li metal batteries

Abstract

Additives in the electrolyte act as engineers in Li metal batteries. Inspired by the superior cycle performance of organic materials in half cells, tetrafluoro-1,4-benzoquinone (TFBQ), the main structure of which has been widely applied as an organic cathode material, is utilized for the first time as an additive for Li metal protection. By chemical and electrochemical reactions between TFBQ and the Li metal surface, an F-rich interface layer is in situ formed on the Li metal surface during the charge and discharge process. From electrochemical tests and characterization, the powerful self-healing ability of the interface layer enabled by TFBQ is revealed, making an extremely stable Li metal anode. By using a lean electrolyte with 0.1 M TFBQ, the cycle life of Li|Li symmetric cells is increased at least 6 times compared to the control group. Moreover, impressive full cell performance was achieved. Ultra-stable Li–LFP cells showed a 0.026% average degradation for 600 cycles at 1C and Li–NMC622 cells showed a 36.8% higher capacity compared to the control group over 200 cycles at 0.5C, which are among the best results reported. Furthermore, this work efficiently and conveniently provides a new research direction to Li metal protection and Li metal batteries.

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [1]
  1. Worcester Polytechnic Institute, MA (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Worcester Polytechnic Institute, MA (United States)
OSTI Identifier:
1838365
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Sustainable Energy & Fuels
Additional Journal Information:
Journal Volume: 5; Journal Issue: 21; Journal ID: ISSN 2398-4902
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Yao, Zeyi, Fu, Jinzhao, Liu, Yangtao, Hou, Jiahui, Vanaphuti, Panawan, Ma, Xiaotu, Zhang, Ruihan, Yang, Zhenzhen, and Wang, Yan. Building a spontaneously formed and self-healing protective layer with an F-rich electrochemically active organic molecule for ultra-stable Li metal batteries. United States: N. p., 2021. Web. doi:10.1039/d1se01161h.
Yao, Zeyi, Fu, Jinzhao, Liu, Yangtao, Hou, Jiahui, Vanaphuti, Panawan, Ma, Xiaotu, Zhang, Ruihan, Yang, Zhenzhen, & Wang, Yan. Building a spontaneously formed and self-healing protective layer with an F-rich electrochemically active organic molecule for ultra-stable Li metal batteries. United States. https://doi.org/10.1039/d1se01161h
Yao, Zeyi, Fu, Jinzhao, Liu, Yangtao, Hou, Jiahui, Vanaphuti, Panawan, Ma, Xiaotu, Zhang, Ruihan, Yang, Zhenzhen, and Wang, Yan. Thu . "Building a spontaneously formed and self-healing protective layer with an F-rich electrochemically active organic molecule for ultra-stable Li metal batteries". United States. https://doi.org/10.1039/d1se01161h. https://www.osti.gov/servlets/purl/1838365.
@article{osti_1838365,
title = {Building a spontaneously formed and self-healing protective layer with an F-rich electrochemically active organic molecule for ultra-stable Li metal batteries},
author = {Yao, Zeyi and Fu, Jinzhao and Liu, Yangtao and Hou, Jiahui and Vanaphuti, Panawan and Ma, Xiaotu and Zhang, Ruihan and Yang, Zhenzhen and Wang, Yan},
abstractNote = {Additives in the electrolyte act as engineers in Li metal batteries. Inspired by the superior cycle performance of organic materials in half cells, tetrafluoro-1,4-benzoquinone (TFBQ), the main structure of which has been widely applied as an organic cathode material, is utilized for the first time as an additive for Li metal protection. By chemical and electrochemical reactions between TFBQ and the Li metal surface, an F-rich interface layer is in situ formed on the Li metal surface during the charge and discharge process. From electrochemical tests and characterization, the powerful self-healing ability of the interface layer enabled by TFBQ is revealed, making an extremely stable Li metal anode. By using a lean electrolyte with 0.1 M TFBQ, the cycle life of Li|Li symmetric cells is increased at least 6 times compared to the control group. Moreover, impressive full cell performance was achieved. Ultra-stable Li–LFP cells showed a 0.026% average degradation for 600 cycles at 1C and Li–NMC622 cells showed a 36.8% higher capacity compared to the control group over 200 cycles at 0.5C, which are among the best results reported. Furthermore, this work efficiently and conveniently provides a new research direction to Li metal protection and Li metal batteries.},
doi = {10.1039/d1se01161h},
journal = {Sustainable Energy & Fuels},
number = 21,
volume = 5,
place = {United States},
year = {Thu Sep 23 00:00:00 EDT 2021},
month = {Thu Sep 23 00:00:00 EDT 2021}
}

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