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Title: Achieving SEI preformed graphite in flow cell to mitigate initial lithium loss

Abstract

The irreversible lithium loss due to the formation of solid electrolyte interphase (SEI) in the initial cycle on the graphite anode greatly reduces the overall cell energy density of lithium ion batteries, that is, the lost Li ions from forming SEI lead to the decrease of Li ions for the intercalation. The method of cathode prelithiation has been widely explored to compensate this lithium loss. However, these cathode additives with high lithium contents inevitably lower the loading of the cathode active materials. In this work, we report a novel approach to solve this challenge, a facile graphite prelithiation method by preforming SEI layers on the surface of graphite powders (Pre-SEI graphite) utilizing a specially designed flow cell. The Li accommodation in the graphite anode can be controlled by the operating time and current density in the flow cell for the electrochemical SEI formation. As a result, we demonstrate a 10% initial Columbic efficiency increase of the LiFePO4 electrode in a full cell configuration using the Pre-SEI graphite, compared with the pristine graphite anode. The electrochemical preformation of SEI on the graphite powders offers a complete solution to offset initial lithium loss without a sacrifice of active cathode material loading.

Authors:
ORCiD logo [1];  [2];  [2];  [3]
+ Show Author Affiliations
  1. Indiana Univ.-Purdue Univ. Indianapolis (IUPUI), Indianapolis, IN (United States); Purdue Univ., West Lafayette, IN (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Indiana Univ.-Purdue Univ. Indianapolis (IUPUI), Indianapolis, IN (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; Indiana Univ.-Purdue Univ. Indianapolis (IUPUI)
OSTI Identifier:
1874579
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 196; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Graphite powder; Initial capacity loss; Lithium ion batteries; Solid electrolyte interphase

Citation Formats

Yu, Yikang, Yang, Zhenzhen, Liu, Yuzi, and Xie, Jian. Achieving SEI preformed graphite in flow cell to mitigate initial lithium loss. United States: N. p., 2022. Web. doi:10.1016/j.carbon.2022.05.024.
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Yu, Yikang, Yang, Zhenzhen, Liu, Yuzi, & Xie, Jian. Achieving SEI preformed graphite in flow cell to mitigate initial lithium loss. United States. https://doi.org/10.1016/j.carbon.2022.05.024
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Yu, Yikang, Yang, Zhenzhen, Liu, Yuzi, and Xie, Jian. Sat . "Achieving SEI preformed graphite in flow cell to mitigate initial lithium loss". United States. https://doi.org/10.1016/j.carbon.2022.05.024. https://www.osti.gov/servlets/purl/1874579.
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@article{osti_1874579,
title = {Achieving SEI preformed graphite in flow cell to mitigate initial lithium loss},
author = {Yu, Yikang and Yang, Zhenzhen and Liu, Yuzi and Xie, Jian},
abstractNote = {The irreversible lithium loss due to the formation of solid electrolyte interphase (SEI) in the initial cycle on the graphite anode greatly reduces the overall cell energy density of lithium ion batteries, that is, the lost Li ions from forming SEI lead to the decrease of Li ions for the intercalation. The method of cathode prelithiation has been widely explored to compensate this lithium loss. However, these cathode additives with high lithium contents inevitably lower the loading of the cathode active materials. In this work, we report a novel approach to solve this challenge, a facile graphite prelithiation method by preforming SEI layers on the surface of graphite powders (Pre-SEI graphite) utilizing a specially designed flow cell. The Li accommodation in the graphite anode can be controlled by the operating time and current density in the flow cell for the electrochemical SEI formation. As a result, we demonstrate a 10% initial Columbic efficiency increase of the LiFePO4 electrode in a full cell configuration using the Pre-SEI graphite, compared with the pristine graphite anode. The electrochemical preformation of SEI on the graphite powders offers a complete solution to offset initial lithium loss without a sacrifice of active cathode material loading.},
doi = {10.1016/j.carbon.2022.05.024},
journal = {Carbon},
number = ,
volume = 196,
place = {United States},
year = {Sat May 14 00:00:00 EDT 2022},
month = {Sat May 14 00:00:00 EDT 2022}
}
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https://doi.org/10.1016/j.carbon.2022.05.024
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