Volume 5, Issue 6 2100280
Research Article

Scalable Manufacture of High-Performance Battery Electrodes Enabled by a Template-Free Method

Ruoyu Xiong

Ruoyu Xiong

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Yun Zhang

Corresponding Author

Yun Zhang

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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

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Yunming Wang

Corresponding Author

Yunming Wang

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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

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Lan Song

Lan Song

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Maoyuan Li

Maoyuan Li

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Hui Yang

Hui Yang

Department of Mechanics, School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Zhigao Huang

Zhigao Huang

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Dequn Li

Dequn Li

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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Huamin Zhou

Huamin Zhou

State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074 China

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First published: 25 April 2021
Citations: 25

Abstract

Ion transport kinetics is identified as the major challenge of thick electrode design for high-energy-density lithium-ion batteries. The introduction of vertically-oriented structure pores, which provide fast transport pathways for Li+, can maximize the rate-performance of electrodes while holding a high energy density. To overcome the harsh manufacturing requirements of traditional template-based methods for the oriented-pore electrodes, a template-free strategy is developed to meet the large-scale fabrication demand, in which controllable oriented microchannels are facilely constructed by vertically aggregated bubbles generated from thermal decomposition. The proposed method is demonstrated to be applicable for different active materials and compatible with industrial roll-to-roll manufacturing. The oriented-pore electrodes exhibit a seven times higher capacity at 5C rate and show double the power density relative to the state of the art while maintaining a high level of energy density. The balance between the ion transport kinetics through the channels and in the matrix manifests an optimal design of the electrode structures, enabling the desired superior performance of the electrodes toward practical applications.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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