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Electrochemical Characteristics of Zn-Ion Hybrid Supercapacitors Based on Aqueous Solution of Different Electrolytes
Electrochemical behaviour of Zn cation based various aqueous electrolytes (ZnSO 4 , Zn(BF 4 ) 2 , zinc di[bis(trifluoromethylsulfonyl)imide], Zn(TFSI) 2 , and zinc trifluoromethanesulfonate, Zn(OTf) 2 ) has been studied in thin Zn foil∣ carbon cloth hybrid supercapacitor cell and compared with Zn(Cl...
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Published in: | Journal of the Electrochemical Society 2022-02, Vol.169 (2), p.20512 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Electrochemical behaviour of Zn cation based various aqueous electrolytes (ZnSO
4
, Zn(BF
4
)
2
, zinc di[bis(trifluoromethylsulfonyl)imide], Zn(TFSI)
2
, and zinc trifluoromethanesulfonate, Zn(OTf)
2
) has been studied in thin Zn foil∣ carbon cloth hybrid supercapacitor cell and compared with Zn(ClO
4
)
2
aqueous electrolyte electrochemical characteristics using cyclic voltammetry, constant current charge/discharge and electrochemical impedance methods. The Ragone plots have been calculated from constant power measurements data. At moderate specific power values (10 kW kg
−1
) noticeable decrease of specific energies can be seen in the order of electrolytes: Zn(ClO
4
)
2
≥ Zn(BF
4
)
2
> Zn(OTf)
2
> Zn(TFSI)
2
> ZnSO
4
. The stability of Zn-ion hybrid supercapacitor cells under study has been tested using the long lasting (up to 10000 cycles) constant current charge/discharge method and is very good for Zn(OTf)
2
, Zn(ClO
4
)
2
and ZnSO
4
. |
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ISSN: | 0013-4651 1945-7111 |
DOI: | 10.1149/1945-7111/ac4d68 |