Monolithically integrated micro-supercapacitors with high areal number density produced by surface adhesive-directed electrolyte assembly

Sen Wang, Shuanghao Zheng, Xiaoyu Shi, Pratteek Das, Linmei Li, Yuanyuan Zhu, Yao Lu (), Xinliang Feng () and Zhong-Shuai Wu ()
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Sen Wang: Chinese Academy of Sciences
Shuanghao Zheng: Chinese Academy of Sciences
Xiaoyu Shi: Chinese Academy of Sciences
Pratteek Das: Chinese Academy of Sciences
Linmei Li: Chinese Academy of Sciences
Yuanyuan Zhu: Chinese Academy of Sciences
Yao Lu: Chinese Academy of Sciences
Xinliang Feng: Technische Universität Dresden
Zhong-Shuai Wu: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Accurately placing very small amounts of electrolyte on tiny micro-supercapacitors (MSCs) arrays in close proximity is a major challenge. This difficulty hinders the development of densely-compact monolithically integrated MSCs (MIMSCs). To overcome this grand challenge, we demonstrate a controllable electrolyte directed assembly strategy for precise isolation of densely-packed MSCs at micron scale, achieving scalable production of MIMSCs with ultrahigh areal number density and output voltage. We fabricate a patterned adhesive surface across MIMSCs, that induce electrolyte directed assembly on 10,000 highly adhesive MSC regions, achieving a 100 µm-scale spatial separation between each electrolyte droplet within seconds. The resultant MIMSCs achieve an areal number density of 210 cells cm−2 and a high areal voltage of 555 V cm−2. Further, cycling the MIMSCs at 190 V over 9000 times manifests no performance degradation. A seamlessly integrated system of ultracompact wirelessly-chargeable MIMSCs is also demonstrated to show its practicality and versatile applicability.

Date: 2024
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DOI: 10.1038/s41467-024-47216-5

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