Volume 18, Issue 2 2104390
Research Article

A Designed Lithiophilic Carbon Channel on Separator to Regulate Lithium Deposition Behavior

Sainan Xu

Sainan Xu

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Teng Zhao

Corresponding Author

Teng Zhao

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Institute of Advanced Technology, Beijing Institute of Technology, Jinan, Shandong, 250300 China

E-mail: [email protected], [email protected]

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Yusheng Ye

Yusheng Ye

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Tianyu Yang

Tianyu Yang

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Rui Luo

Rui Luo

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

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Li Li

Li Li

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Institute of Advanced Technology, Beijing Institute of Technology, Jinan, Shandong, 250300 China

Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081 China

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Feng Wu

Feng Wu

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Institute of Advanced Technology, Beijing Institute of Technology, Jinan, Shandong, 250300 China

Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081 China

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Renjie Chen

Corresponding Author

Renjie Chen

Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081 China

Institute of Advanced Technology, Beijing Institute of Technology, Jinan, Shandong, 250300 China

Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081 China

E-mail: [email protected], [email protected]

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First published: 06 November 2021
Citations: 8

Abstract

Issues with unstable SEI formation and uncontrollable lithium dendrite growth impede the practical use of lithium anode in high-energy batteries. Herein, a lithiophilic carbon channel on separator is designed to regulate lithium deposition behavior. The designed channel is formed by carbon nanosheet with cubic cavity (CNCC) prepared by hard template method. The CNCC with a large specific surface area and good electrolyte wettability can effectively reduce the local current density. Besides, the CNCC coated separator with high Young's modulus can mechanically inhibit the growth of lithium dendrites. Notably, CNCC coating can become lithiophilic during lithium plating/striping process, which is beneficial for homogeneous lithium deposition and low lithium nucleation overpotential. As a result, based on the CNCC coated separator, the symmetric Li|Li cell cycle over 2600h at 6 mA cm−2 for 2 mAh cm−2, while the Li|Cu cell reaches average Coulombic efficiency of 98.5% at 2 mA cm−2 for 2 mAh cm−2.

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.

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