TY - JOUR
T1 - Charge-Transfer-Modulated Transparent Supercapacitor Using Multidentate Molecular Linker and Conductive Transparent Nanoparticle Assembly
AU - Choi, Jimin
AU - Nam, Donghyeon
AU - Shin, Dongyeeb
AU - Song, Youngkwon
AU - Kwon, Cheong Hoon
AU - Cho, Ikjun
AU - Lee, Seung Woo
AU - Cho, Jinhan
N1 - Funding Information:
This work was supported by a National Research Foundation (NRF) of Korea grant funded by the Ministry of Science, ICT & Future Planning (MSIP) (NRF-2018R1A2A1A05019452; NRF-2019R1A4A1027627) and the Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education (NRF-2017R1A6A3A04003192).
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/11/26
Y1 - 2019/11/26
N2 - One of the most critical issues in preparing high-performance transparent supercapacitors (TSCs) is to overcome the trade-off between areal capacitance and optical transmittance as well as that between areal capacitance and rate capability. Herein, we introduce a TSC with high areal capacitance, fast rate capability, and good optical transparency by minimizing the charge transfer resistance between pseudocapacitive nanoparticles (NPs) using molecular linker- and conductive NP-mediated layer-by-layer (LbL) assembly. For this study, bulky ligand-stabilized manganese oxide (MnO) and indium tin oxide (ITO) NP multilayers are LbL-assembled through a ligand exchange reaction between native ligands and small multidentate linkers (tricarballylic acid). The introduced molecular linker substantially decreases the separation distance between neighboring NPs, thereby reducing the contact resistance of electrodes. Moreover, the periodic insertion of ITO NPs into the MnO NP-based electrodes can lower the charge transfer resistance without a meaningful loss of transmittance, which can significantly improve the areal capacitance. The areal capacitances of the ITO NP-free electrode and the ITO NP-incorporated electrode are 24.6 mF cm-2 (at 61.6% transmittance) and 40.5 mF cm-2 (at 60.8%), respectively, which outperforms state of the art TSCs. Furthermore, we demonstrate a flexible symmetric solid-state TSC that exhibits scalable areal capacitance and optical transmittance.
AB - One of the most critical issues in preparing high-performance transparent supercapacitors (TSCs) is to overcome the trade-off between areal capacitance and optical transmittance as well as that between areal capacitance and rate capability. Herein, we introduce a TSC with high areal capacitance, fast rate capability, and good optical transparency by minimizing the charge transfer resistance between pseudocapacitive nanoparticles (NPs) using molecular linker- and conductive NP-mediated layer-by-layer (LbL) assembly. For this study, bulky ligand-stabilized manganese oxide (MnO) and indium tin oxide (ITO) NP multilayers are LbL-assembled through a ligand exchange reaction between native ligands and small multidentate linkers (tricarballylic acid). The introduced molecular linker substantially decreases the separation distance between neighboring NPs, thereby reducing the contact resistance of electrodes. Moreover, the periodic insertion of ITO NPs into the MnO NP-based electrodes can lower the charge transfer resistance without a meaningful loss of transmittance, which can significantly improve the areal capacitance. The areal capacitances of the ITO NP-free electrode and the ITO NP-incorporated electrode are 24.6 mF cm-2 (at 61.6% transmittance) and 40.5 mF cm-2 (at 60.8%), respectively, which outperforms state of the art TSCs. Furthermore, we demonstrate a flexible symmetric solid-state TSC that exhibits scalable areal capacitance and optical transmittance.
KW - charge transfer resistance
KW - indium tin oxide nanoparticles
KW - multidentate linker
KW - multilayer
KW - transparent supercapacitor
UR - http://www.scopus.com/inward/record.url?scp=85074273157&partnerID=8YFLogxK
U2 - 10.1021/acsnano.9b04594
DO - 10.1021/acsnano.9b04594
M3 - Article
C2 - 31642659
AN - SCOPUS:85074273157
SN - 1936-0851
VL - 13
SP - 12719
EP - 12731
JO - ACS Nano
JF - ACS Nano
IS - 11
ER -