Abstract
Electrical conductivity, mechanical flexibility, and large electroactive surface areas are the most important factors in determining the performance of various flexible electrodes in energy storage devices. Herein, a layer-by-layer (LbL) assembly-induced metal electrodeposition approach is introduced to prepare a variety of highly porous 3D-current collectors with high flexibility, metallic conductivity, and large surface area. In this study, a few metal nanoparticle (NP) layers are LbL-assembled onto insulating paper for the preparation of conductive paper. Subsequent Ni electroplating of the metal NP-coated substrates reduces the sheet resistance from ≈103 to <0.1 Ω sq−1 while maintaining the porous structure of the pristine paper. Particularly, this approach is completely compatible with commercial electroplating processes, and thus can be directly extended to electroplating applications using a variety of other metals in addition to Ni. After depositing high-energy MnO NPs onto Ni-electroplated papers, the areal capacitance increases from 68 to 811 mF cm−2 as the mass loading of MnO NPs increases from 0.16 to 4.31 mg cm−2. When metal NPs are periodically LbL-assembled with the MnO NPs, the areal capacitance increases to 1710 mF cm−2.
Original language | English |
---|---|
Article number | 2007579 |
Journal | Small |
Volume | 17 |
Issue number | 19 |
DOIs | |
Publication status | Published - 2021 May 12 |
Bibliographical note
Funding Information:S.W., D.N., W.C. contributed equally to this work. This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea government (2019R1A4A1027627, 2021R1A2C3004151).
Publisher Copyright:
© 2021 Wiley-VCH GmbH
Keywords
- electrodeposition
- layer-by-layer assembly
- metal NP incorporation
- metallic paper
- textile supercapacitor electrodes
ASJC Scopus subject areas
- Biotechnology
- Biomaterials
- General Chemistry
- General Materials Science