TY - JOUR
T1 - CoFe Prussian blue analogues on 3D porous N-doped carbon nanosheets boost the intercalation kinetics for a high-performance quasi-solid-state hybrid capacitor
AU - Choi, Juhyung
AU - Lim, Jiho
AU - Kim, Daekyu
AU - Park, Sumin
AU - Yan, Bingyi
AU - Ko, Dongjin
AU - Cho, Youngseul
AU - Lee, Lawrence Yoon Suk
AU - Piao, Yuanzhe
N1 - Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2021R1A2C1008380) and Nano Material Technology Development Program (NRF-2015M3A7B6027970) of MSIP/NRF. The financial support from the Hong Kong Polytechnic University (Q-CDA3) is also acknowledged.
Publisher Copyright:
© 2022 The Royal Society of Chemistry.
PY - 2022/6/28
Y1 - 2022/6/28
N2 - Prussian blue analogues (PBAs), especially those with crystal water networks, have attracted extensive attention for aqueous electrolyte-based energy storage devices. Herein, we report CoFe Prussian blue analogue (CoFe PBA) nanoparticles grown on interconnected porous nitrogen-doped carbon (IPNC) as an electrode material for a high-performance hybrid capacitor. The CoFe PBA/IPNC hybrid exhibits a high specific capacity of 93.1 mA h g−1 at a current density of 0.5 A g−1 with excellent cycling stability (retention of 91.5%) in 0.5 M Na2SO4 electrolyte. The hierarchical porous carbon support provides sufficient ion diffusion channels, and the numerous electroactive interfaces between CoFe PBA and IPNC enhance reaction kinetics for intercalation charge storage. Theoretical calculations verify the significant influence of the interface interaction between CoFe PBA and IPNC for enhanced electrochemical kinetics. A quasi-solid-state hybrid capacitor assembled using CoFe PBA/IPNC, IPNC, and Na2SO4–PAM gel as the positive electrode, negative electrode, and electrolyte shows high energy density up to 42.9 W h kg−1 and power density up to 14.6 kW kg−1. The flexible device successfully operates an LED paper-watch, demonstrating the potential for practical application.
AB - Prussian blue analogues (PBAs), especially those with crystal water networks, have attracted extensive attention for aqueous electrolyte-based energy storage devices. Herein, we report CoFe Prussian blue analogue (CoFe PBA) nanoparticles grown on interconnected porous nitrogen-doped carbon (IPNC) as an electrode material for a high-performance hybrid capacitor. The CoFe PBA/IPNC hybrid exhibits a high specific capacity of 93.1 mA h g−1 at a current density of 0.5 A g−1 with excellent cycling stability (retention of 91.5%) in 0.5 M Na2SO4 electrolyte. The hierarchical porous carbon support provides sufficient ion diffusion channels, and the numerous electroactive interfaces between CoFe PBA and IPNC enhance reaction kinetics for intercalation charge storage. Theoretical calculations verify the significant influence of the interface interaction between CoFe PBA and IPNC for enhanced electrochemical kinetics. A quasi-solid-state hybrid capacitor assembled using CoFe PBA/IPNC, IPNC, and Na2SO4–PAM gel as the positive electrode, negative electrode, and electrolyte shows high energy density up to 42.9 W h kg−1 and power density up to 14.6 kW kg−1. The flexible device successfully operates an LED paper-watch, demonstrating the potential for practical application.
UR - http://www.scopus.com/inward/record.url?scp=85133719160&partnerID=8YFLogxK
U2 - https://doi.org/10.1039/D2TA03033K
DO - https://doi.org/10.1039/D2TA03033K
M3 - Journal article
VL - 10
SP - 14501
EP - 14512
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 27
ER -