TY - JOUR
T1 - Experimental and theoretical exploration of nickel ion-implanted metal-organic frameworks (ZIF-67) as free-standing electrodes for hybrid supercapacitors
AU - Savariraj, Antonysamy Dennyson
AU - Raj, Chellan Justin
AU - Velayutham, Rajavel
AU - Jang, Hye Min
AU - Sivakumar, Periyasamy
AU - Cho, Won Je
AU - Kim, Byung Chul
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Ion beam irradiation is a non-destructive method to tune the composition and morphology of nanoarchitectures. It is a promising tool owing to the creation of crystal defects such as dislocations and vacancies in addition to ion implantation. Due to the advantages of structural versatility, tunability of chemical composition and high theoretical capacity, Metal organic frameworks are considered as a potential class of electrode materials for supercapacitors. We have in situ grown ZIF-67, without binder on carbon cloth and modified the interface by implanting with Ni ions. Benefiting from the Ni+ ion implanted ZIF-67 (CC/Ni@ZIF67-4) as a binder-free positive electrode delivered an areal capacitance of 1010 mF cm−2 at 1 mA cm−2 with profound cyclic retention of 93.5%. The hybrid supercapacitor assembled with CC/Ni@ZIF-67-4//CC/O,N,S@AC composition delivered a maximum voltage window of 1.5 V, exhibited a specific capacitance of 68 F g−1 at a current density of 2 Ag-1 energy density, an energy density of 21.26 Wh kg−1 and power density of 13,500 W kg−1 as well as a remarkable electrochemical stability up to 10,000 (96.4% retention at 10 Ag-1). The density functional theory calculations show a change in the Fermi level after the inclusion of Ni+ ions supporting the experimental data.
AB - Ion beam irradiation is a non-destructive method to tune the composition and morphology of nanoarchitectures. It is a promising tool owing to the creation of crystal defects such as dislocations and vacancies in addition to ion implantation. Due to the advantages of structural versatility, tunability of chemical composition and high theoretical capacity, Metal organic frameworks are considered as a potential class of electrode materials for supercapacitors. We have in situ grown ZIF-67, without binder on carbon cloth and modified the interface by implanting with Ni ions. Benefiting from the Ni+ ion implanted ZIF-67 (CC/Ni@ZIF67-4) as a binder-free positive electrode delivered an areal capacitance of 1010 mF cm−2 at 1 mA cm−2 with profound cyclic retention of 93.5%. The hybrid supercapacitor assembled with CC/Ni@ZIF-67-4//CC/O,N,S@AC composition delivered a maximum voltage window of 1.5 V, exhibited a specific capacitance of 68 F g−1 at a current density of 2 Ag-1 energy density, an energy density of 21.26 Wh kg−1 and power density of 13,500 W kg−1 as well as a remarkable electrochemical stability up to 10,000 (96.4% retention at 10 Ag-1). The density functional theory calculations show a change in the Fermi level after the inclusion of Ni+ ions supporting the experimental data.
KW - Density functional theory
KW - Fermi level
KW - Hybrid supercapacitor
KW - Ion beam irradiation
KW - Metal organic frameworks
UR - http://www.scopus.com/inward/record.url?scp=85166285620&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2023.233467
DO - 10.1016/j.jpowsour.2023.233467
M3 - Article
AN - SCOPUS:85166285620
SN - 0378-7753
VL - 580
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 233467
ER -