Abstract
HighlightsPore size and graphitization engineering of carbon cathode were orientated-designed by regulating the molar ratios of Zn/Co ions.Zn90Co10-APC and its assembled PLG//Zn90Co10-APC LIC both deliver the excellent electrochemical performances.
Highlights
Lithium ion capacitor (LIC) is assembled by a battery-type anode and a capacitor-type cathode in a Li-salt electrolyte, elaborately combining the merits of high energy/power densities and long cycle life [1,2,3,4]
It is well known that Zeolite imidazole frameworks (ZIFs)-8 and ZIF-67 are isologues, which are fabricated by the reactions of 2-methyl imidazole with zinc and cobalt ions, respectively [36]
The results demonstrate that ZnxCo100−x–APCs almost exhibit the similar chemical environment, which could further highlight the effect of pore sizes of carbon materials for the capacity contribution
Summary
Lithium ion capacitor (LIC) is assembled by a battery-type anode and a capacitor-type cathode in a Li-salt electrolyte, elaborately combining the merits of high energy/power densities and long cycle life [1,2,3,4]. The low spe‐ cific capacity exacerbates the difficulty of electrode fabri‐ cation, seriously hindering the improvement of LICs [13, 14]. Involving the pseudocapacitance reaction to carbon electrodes by heteroatom-doping method is a feasi‐ ble strategy for promoting fast reaction kinetics and provid‐ ing the additional capacity [16,17,18]. These aspects are not considered as the crucial factors for determining the intrinsic electrochemical performances of electric doublelayer capacitors (EDLCs) [19]
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