A Novel High-Performance Electrolyte for Extreme Fast Charging in Pilot Scale Lithium-Ion Pouch Cells

Zhijia Du; Zhenzhen Yang; Runming Tao; Vadim Shipitsyn; Xianyang Wu; David C. Robertson; Kelsey M. Livingston; Shae Hagler; James Kwon; Lin Ma; Ira D. Bloom; Brian J. Ingram

doi:10.1002/batt.202300292

A Novel High-Performance Electrolyte for Extreme Fast Charging in Pilot Scale Lithium-Ion Pouch Cells

Zhijia Du, Zhenzhen Yang, Runming Tao, Vadim Shipitsyn, Xianyang Wu, David C. Robertson, Kelsey M. Livingston, Shae Hagler, James Kwon, Lin Ma, Ira D. Bloom, Brian J. Ingram

Emerging and Solid-State Batteries

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Realizing extreme fast charging (XFC) in lithium-ion batteries for electric vehicles is still challenging due to the insufficient lithium-ion transport kinetics, especially in the electrolyte. Herein, a novel high-performance electrolyte (HPE) consisting of lithium bis(fluorosulfonyl)imide (LiFSI), lithium hexafluorophosphate (LiPF₆) and carbonates is proposed and tested in pilot-scale, 2-Ah pouch cells. Moreover, the origin of improved electrochemical performance is comprehensively studied via various characterizations, suggesting that the proposed HPE exhibits high ionic conductivity and excellent electrochemical stability at high charging rate of 6-C. Therefore, the HPE-based pouch cells deliver improved discharge specific capacity and excellent long-term cyclability up to 1500 cycles under XFC conditions, which is superior to the conventional state-of-the-art baseline electrolyte.

Original language	English
Article number	e202300292
Journal	Batteries and Supercaps
Volume	6
Issue number	10
DOIs	https://doi.org/10.1002/batt.202300292
State	Published - Oct 2023

Funding

This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE) under contract DE-AC05-00OR22725, was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO) (Program Manager: Brian Cunningham, Technology Manager: Jake Herb). Argonne National Laboratory is operated for the DOE Office of Science by UChicago Argonne, LLC, under contract number DE-AC02-06CH11357. L. M. acknowledges the support by the US National Science Foundation Award No. 2301719. Note: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE) under contract DE‐AC05‐00OR22725, was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) Vehicle Technologies Office (VTO) (Program Manager: Brian Cunningham, Technology Manager: Jake Herb). Argonne National Laboratory is operated for the DOE Office of Science by UChicago Argonne, LLC, under contract number DE‐AC02‐06CH11357. L. M. acknowledges the support by the US National Science Foundation Award No. 2301719.

Keywords

calendar life
electrolyte
fast charging
post-test
pouch cell

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/batt.202300292

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title = "A Novel High-Performance Electrolyte for Extreme Fast Charging in Pilot Scale Lithium-Ion Pouch Cells",

abstract = "Realizing extreme fast charging (XFC) in lithium-ion batteries for electric vehicles is still challenging due to the insufficient lithium-ion transport kinetics, especially in the electrolyte. Herein, a novel high-performance electrolyte (HPE) consisting of lithium bis(fluorosulfonyl)imide (LiFSI), lithium hexafluorophosphate (LiPF6) and carbonates is proposed and tested in pilot-scale, 2-Ah pouch cells. Moreover, the origin of improved electrochemical performance is comprehensively studied via various characterizations, suggesting that the proposed HPE exhibits high ionic conductivity and excellent electrochemical stability at high charging rate of 6-C. Therefore, the HPE-based pouch cells deliver improved discharge specific capacity and excellent long-term cyclability up to 1500 cycles under XFC conditions, which is superior to the conventional state-of-the-art baseline electrolyte.",

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AU - Du, Zhijia

AU - Yang, Zhenzhen

AU - Tao, Runming

AU - Shipitsyn, Vadim

AU - Wu, Xianyang

AU - Robertson, David C.

AU - Livingston, Kelsey M.

AU - Hagler, Shae

AU - Kwon, James

AU - Ma, Lin

AU - Bloom, Ira D.

AU - Ingram, Brian J.

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N2 - Realizing extreme fast charging (XFC) in lithium-ion batteries for electric vehicles is still challenging due to the insufficient lithium-ion transport kinetics, especially in the electrolyte. Herein, a novel high-performance electrolyte (HPE) consisting of lithium bis(fluorosulfonyl)imide (LiFSI), lithium hexafluorophosphate (LiPF6) and carbonates is proposed and tested in pilot-scale, 2-Ah pouch cells. Moreover, the origin of improved electrochemical performance is comprehensively studied via various characterizations, suggesting that the proposed HPE exhibits high ionic conductivity and excellent electrochemical stability at high charging rate of 6-C. Therefore, the HPE-based pouch cells deliver improved discharge specific capacity and excellent long-term cyclability up to 1500 cycles under XFC conditions, which is superior to the conventional state-of-the-art baseline electrolyte.

AB - Realizing extreme fast charging (XFC) in lithium-ion batteries for electric vehicles is still challenging due to the insufficient lithium-ion transport kinetics, especially in the electrolyte. Herein, a novel high-performance electrolyte (HPE) consisting of lithium bis(fluorosulfonyl)imide (LiFSI), lithium hexafluorophosphate (LiPF6) and carbonates is proposed and tested in pilot-scale, 2-Ah pouch cells. Moreover, the origin of improved electrochemical performance is comprehensively studied via various characterizations, suggesting that the proposed HPE exhibits high ionic conductivity and excellent electrochemical stability at high charging rate of 6-C. Therefore, the HPE-based pouch cells deliver improved discharge specific capacity and excellent long-term cyclability up to 1500 cycles under XFC conditions, which is superior to the conventional state-of-the-art baseline electrolyte.

KW - calendar life

KW - electrolyte

KW - fast charging

KW - post-test

KW - pouch cell

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ER -

A Novel High-Performance Electrolyte for Extreme Fast Charging in Pilot Scale Lithium-Ion Pouch Cells

Abstract

Funding

Keywords

UN SDGs

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