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Nano Research https://doi.org/10.1007/s12274-024-6647-9
Research Article | Online first | Published: 02 May 2024

Enhancing electrolyte ion diffusion via direct ink writing pillar array structure of graphene electrodes for high-performance microsupercapacitors

Show Author's Information Yan Zhang1,  Huandi Zhang1,  Xiaoxiao Wang2,  Cheng Tang1,  Xiaowei Shi1,  Zehua Zhao1,  Jiamei Liu3,  Guolong Wang1,  Jianfeng Shen4,  Lei Li1( )
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an 710049, China
Center for Materials Chemistry, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Instrument Analysis Center of Xi'an Jiaotong University, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an 710049, China
Institute of special materials and technology, Fudan University, Shanghai 200433, China
Keywords:
ion transport, microsupercapacitors, direct ink writing, pillar array structure, areal energy density
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Supercapacitor
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Zhang Y, Zhang H, Wang X, et al. Enhancing electrolyte ion diffusion via direct ink writing pillar array structure of graphene electrodes for high-performance microsupercapacitors. Nano Research, 2024, https://doi.org/10.1007/s12274-024-6647-9
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Abstract Full text Electronic supplementary material About this article

The graphene-based microsupercapacitors (MSCs) suffer from graphene aggregation issue in electrodes. It reduces the electrolyte ions transportation in the electrodes to degrade the charge storage ability of MSCs, hampering their practical application. Increasing the electrolyte ions transportation in the electrodes can boost the charge storage ability of MSCs. Herein, we design and experimentally realize pillar array structure of graphene electrodes for MSCs by direct ink writing technology. The graphene electrodes with pillar array structure increase the contact area with electrolyte and short the electrolyte ions transport path, facilitating electrolyte ions transport in electrodes. The MSCs exhibit high areal capacitance of 25.67 mF·cm–2, high areal energy density of 20.54 μWh·cm–2, and high power density of 1.45 mW·cm–2. One single MSCs can power timer for 10 min and pressure sensor more than 160 min, showing high practical application possibility. This work provides a new avenue for developing high performance MSCs.


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About this article

Enhancing electrolyte ion diffusion via direct ink writing pillar array structure of graphene electrodes for high-performance microsupercapacitors

Show Author's information Yan Zhang1, Huandi Zhang1, Xiaoxiao Wang2, Cheng Tang1, Xiaowei Shi1, Zehua Zhao1, Jiamei Liu3, Guolong Wang1, Jianfeng Shen4, Lei Li1( )
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an 710049, China
Center for Materials Chemistry, Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China
Instrument Analysis Center of Xi'an Jiaotong University, Xi’an Jiaotong University, 28 Xianning West Road, Xi’an 710049, China
Institute of special materials and technology, Fudan University, Shanghai 200433, China

Abstract

The graphene-based microsupercapacitors (MSCs) suffer from graphene aggregation issue in electrodes. It reduces the electrolyte ions transportation in the electrodes to degrade the charge storage ability of MSCs, hampering their practical application. Increasing the electrolyte ions transportation in the electrodes can boost the charge storage ability of MSCs. Herein, we design and experimentally realize pillar array structure of graphene electrodes for MSCs by direct ink writing technology. The graphene electrodes with pillar array structure increase the contact area with electrolyte and short the electrolyte ions transport path, facilitating electrolyte ions transport in electrodes. The MSCs exhibit high areal capacitance of 25.67 mF·cm–2, high areal energy density of 20.54 μWh·cm–2, and high power density of 1.45 mW·cm–2. One single MSCs can power timer for 10 min and pressure sensor more than 160 min, showing high practical application possibility. This work provides a new avenue for developing high performance MSCs.

Keywords: ion transport, microsupercapacitors, direct ink writing, pillar array structure, areal energy density

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Publication history
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Acknowledgements

Publication history

Received: 29 January 2024
Revised: 13 March 2024
Accepted: 18 March 2024
Published: 02 May 2024

Copyright

© Tsinghua University Press 2024

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 52072297), Key R&D Plan of Shaanxi Province (No. 2021GXLH-Z-068), and Young Talent Support Plan of Xi’an Jiaotong University. The authors also thank Instrument Analysis Center of Xi’an Jiaotong University for their help in materials characterizations.

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