TY  - JOUR
T1  - Zwitterionic silica sulfobetaine grafted activated carbon as electrode material for supercapacitors
AU  - Bon, Chris Yeajoon
AU  - Mugobera, Sharon
AU  - Phiri, Isheunesu
AU  - Lee, Kwang Se
AU  - Park, Jeong Ho
AU  - Ko, Jang Myoun
AU  - Lee, Kyuchul
AU  - Kwon, Hyukmin
AU  - Park, Jongwook
AU  - Yoo, Sang-Im
JO  - Colloids and Surfaces A: Physicochemical and Engineering Aspects
VL  - 694
SP  - 134161
PY  - 2024
DA  - 2024/08/05/
SN  - 0927-7757
DO  - https://doi.org/10.1016/j.colsurfa.2024.134161
UR  - https://www.sciencedirect.com/science/article/pii/S0927775724010227
KW  - Activated carbon
KW  - Silica sulfobetaine
KW  - Zwitterions
KW  - Supercapacitors
AB  - This study introduces novel approach to enhance the energy and power capabilities of activated carbon (AC) electrodes through the incorporation of zwitterionic silica sulfobetaine (ZSS). ZSS helps to disperse the aggregation of AC increasing the surface area, thereby increasing specific capacitance, while its zwitterionic nature facilitates ionic transport, improving charge-discharge efficiency. The enhanced electrochemical properties of ZSS-AC were confirmed with cyclic voltammetry with nearly 100 % initial capacitance retention after 5000 cycles, galvanostatic charge-discharge, and impedance spectroscopy with ZSS-AC exhibiting higher specific capacitance of 325 F g–1 compared to AC with 212 F g–1. The AC had an energy density of 29.4 W h kg–1 and a power density of 1339.7 W kg–1 whilst the ZSS-AC had an energy density of 45.1 W h kg–1 and a power density of 1218.0 W kg–1 at 1 A g–1. These results show grafting ZSS onto AC is a viable solution for enhancing supercapacitor electrode materials.
ER  -