TY - JOUR
T1 - KOH-Activated Hollow ZIF-8 Derived Porous Carbon
T2 - Nanoarchitectured Control for Upgraded Capacitive Deionization and Supercapacitor
AU - Kim, Minjun
AU - Xu, Xingtao
AU - Xin, Ruijing
AU - Earnshaw, Jacob
AU - Ashok, Aditya
AU - Kim, Jeonghun
AU - Park, Teahoon
AU - Nanjundan, Ashok Kumar
AU - El-Said, Waleed A.
AU - Yi, Jin Woo
AU - Na, Jongbeom
AU - Yamauchi, Yusuke
N1 - Funding Information:
This research was supported by the Principal Research Program (PNK7330) at the Korea Institute of Materials Science (KIMS).
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/11/10
Y1 - 2021/11/10
N2 - Herein, the synergistic effects of hollow nanoarchitecture and high specific surface area of hollow activated carbons (HACs) are reported with the superior supercapacitor (SC) and capacitive deionization (CDI) performance. The center of zeolite imidazolate framework-8 (ZIF-8) is selectively etched to create a hollow cavity as a macropore, and the resulting hollow ZIF-8 (HZIF-8) is carbonized to obtain hollow carbon (HC). The distribution of nanopores is, subsequently, optimized by KOH activation to create more nanopores and significantly increase specific surface area. Indeed, as-prepared hollow activated carbons (HACs) show significant improvement not only in the maximum specific capacitance and desalination capacity but also capacitance retention and mean desalination rates in SC and CDI, respectively. As a result, it is confirmed that well-designed nanoarchitecture and porosity are required to allow efficient diffusion and maximum electrosorption of electrolyte ions.
AB - Herein, the synergistic effects of hollow nanoarchitecture and high specific surface area of hollow activated carbons (HACs) are reported with the superior supercapacitor (SC) and capacitive deionization (CDI) performance. The center of zeolite imidazolate framework-8 (ZIF-8) is selectively etched to create a hollow cavity as a macropore, and the resulting hollow ZIF-8 (HZIF-8) is carbonized to obtain hollow carbon (HC). The distribution of nanopores is, subsequently, optimized by KOH activation to create more nanopores and significantly increase specific surface area. Indeed, as-prepared hollow activated carbons (HACs) show significant improvement not only in the maximum specific capacitance and desalination capacity but also capacitance retention and mean desalination rates in SC and CDI, respectively. As a result, it is confirmed that well-designed nanoarchitecture and porosity are required to allow efficient diffusion and maximum electrosorption of electrolyte ions.
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U2 - 10.1021/acsami.1c09107
DO - 10.1021/acsami.1c09107
M3 - Article
AN - SCOPUS:85114635811
SN - 1944-8244
VL - 13
SP - 52034
EP - 52043
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 44
ER -