Volume 6, Issue 10 e202300292
Research Article

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

Dr. Zhijia Du

Corresponding Author

Dr. Zhijia Du

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

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Dr. Zhenzhen Yang

Dr. Zhenzhen Yang

Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, 60439 Lemont, IL, USA

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Dr. Runming Tao

Dr. Runming Tao

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

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Vadim Shipitsyn

Vadim Shipitsyn

Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, 28223 Charlotte, NC, USA

Battery Complexity, Autonomous Vehicle and Electrification (BATT CAVE) Research Center, The University of North Carolina at Charlotte, 28223 Charlotte, NC, USA

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Dr. Xianyang Wu

Dr. Xianyang Wu

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, 60439 Lemont, IL, USA

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David C. Robertson

David C. Robertson

Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, 60439 Lemont, IL, USA

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Kelsey M. Livingston

Kelsey M. Livingston

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

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Shae Hagler

Shae Hagler

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

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James Kwon

James Kwon

Electrification and Energy Infrastructure Division, Oak Ridge National Laboratory, 37830 Oak Ridge, TN, USA

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Prof. Dr. Lin Ma

Prof. Dr. Lin Ma

Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, 28223 Charlotte, NC, USA

Battery Complexity, Autonomous Vehicle and Electrification (BATT CAVE) Research Center, The University of North Carolina at Charlotte, 28223 Charlotte, NC, USA

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Dr. Ira D. Bloom

Dr. Ira D. Bloom

Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, 60439 Lemont, IL, USA

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Dr. Brian J. Ingram

Dr. Brian J. Ingram

Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S Cass Ave, 60439 Lemont, IL, USA

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First published: 13 August 2023
Citations: 1

Graphical Abstract

Fast charging! A newly developed electrolyte has shown remarkable fast charging performance and has been validated in 2-Ah pouch cells. The cell shows 80 % capacity retention after 1500 extreme fast charging (10-minute) cycles.

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.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.