Supercapattery driven electrolyzer both empowered by the same superb electrocatalyst

Abstract

Multifunctional materials are highly desirable not only for energy storage and conversion devices but also for integrated self-driven water-splitting systems. In this study, we propose a facile approach for developing...

Decoupling mechano- and electrochemical gating: a direct visualization for piezo-ionic propelled proton tunneling in self-charging supercapacitors

“…3(E)) recorded at different applied voltages shows there are no observation of any charge-transfer resistances (usually observed as a semi-circle-like arc), and only the Warburg line is observed because of proton diffusion at the graphene electrodes. 52 The Warburg line runs almost parallel to the imaginary component of the impedance for all applied voltages. In contrast, it deviates for 0.8 V due to the parasitic reactions at these voltages.…”

Redox-Active Two-Dimensional Tetrathiafulvalene-Copper Metal–Organic Framework with Boosted Electrochemical Performances for Supercapatteries

“…The supercapattery of AC|| 1-ox′ is also assembled and the performance of AC|| 1-ox′ is shown in Figures S17 and c,d. The electrochemical performance of AC|| 1-ox is better than that of AC|| 1-ox′ (Figure c,d) and one of the best among those reported supercapatteries as shown in Figure d. − ,− ,− …”

“…Electrochemical performances of supercapatteries: (a) CVs at different scan rates of the AC|| 1-ox supercapattery; (b) GCD profiles at different specific currents of the AC|| 1-ox supercapattery; (c) specific capacities at different specific currents of AC|| 1-ox and AC|| 1-ox′ supercapatteries; (d) Ragone plots compared with previously reported supercapatteries in the literature ([1]–[5] corresponding to refs , , , , and [6]–[26] corresponding to refs – , – ); (e) cycling stability over 5000 GCD cycles at 5 A g –1 of the AC|| 1-ox supercapattery.…”

Efficient Self‐Powered Overall Water Splitting by Ni4Mo/MoO2 Heterogeneous Nanorods Trifunctional Electrocatalysts

“…The shifts in the binding energies of both Ni and Mo in the Ni 4 Mo/MoO 2 ‐550 electrode indicate the existence of strong electron interaction between Ni 4 Mo and MoO 2 , which could not only modulate the electronic configuration of the Ni 4 Mo/MoO 2 ‐550 but also optimize the adsorption energy of reactants toward improving its electrochemical performances. [ 14,21 ] Moreover, compared to the O 1s XPS spectrum of NiMoO 4 , the spectrum of Ni 4 Mo/MoO 2 ‐550 shifts toward the higher binding energy (Figure S6b, Supporting Information), also attributed to the formation of heterogeneous interfaces between Ni 4 Mo and MoO 2 . [ 22 ] In order to explain the presence of strong electron interaction of Ni 4 Mo and MoO 2 in the Ni 4 Mo/MoO 2 ‐550 sample, XPS analysis of pristine Ni 4 Mo and MoO 2 samples were performed (Figure S7, Supporting Information).…”