New Carbon Materials, Год журнала: 2023, Номер 38(1), С. 1 - 15
Опубликована: Фев. 1, 2023
Язык: Английский
New Carbon Materials, Год журнала: 2023, Номер 38(1), С. 1 - 15
Опубликована: Фев. 1, 2023
Язык: Английский
Advanced Energy Materials, Год журнала: 2023, Номер 13(35)
Опубликована: Июль 27, 2023
Abstract The difficulty in matching cathode and anode kinetics due to slow ion transport anodes constrains the development of lithium‐ion capacitors. Heterogeneous structures with built‐in electric field can promote migration improve reaction kinetics. However, valence evolution metal elements heterostructures during charging/discharging processes is often overlooked. Inspired by theoretical calculations, transition selenides (FeSe 2 /CoSe ) low energy barriers ( E b = 0.35 eV) are successfully engineered fabricated. As expected, designed heterostructure material exhibits outstanding rate performance (512 mAh g −1 at 30 A ultra‐high pseudocapacitance contribution (98.02% 1.0 mV s ), exceeding state‐of‐the‐art values for anodes. Impressively, synchrotron X‐ray absorption spectroscopy (SXAS) ex situ XPS find that states Fe Co heterogeneous structure gradually increase as charging discharging proceeds, inducing a continuous climb reversible specific capacity, while further reducing barrier 0.20 eV). This work reveals iron cobalt providing guidance improving revealing capacity rise mechanism other compounds.
Язык: Английский
Процитировано
33Rare Metals, Год журнала: 2023, Номер 42(8), С. 2633 - 2642
Опубликована: Июнь 12, 2023
Язык: Английский
Процитировано
29Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(9)
Опубликована: Янв. 9, 2023
Herein, a chemical pre-potassiation strategy via simultaneously treating both glucose derived carbon (GDC) anode and commercial activated (CAC) cathode in potassium-naphthalene-tetrahydrofuran solution is developed for potassium ion hybrid capacitor (PIHC). Combined with situ ex characterizations, radical reaction between reagent electrodes confirmed, which not only deactivates electrochemical irreversible sites, but also promotes to pre-form uniform dense KF-rich electrolyte film on the electrodes. As result, treatment presents multiple advantages: (I) initial Coulombic efficiency (CE) of GDC increases from 45.4 % 84.0 higher rate capability; (II) CAC exhibits improved cycling CEs stability due enhanced resistance oxidation at 4.2 V; (III) assembled PIHC achieves high energy density 172.5 Wh kg-1 life over 10000 cycles.
Язык: Английский
Процитировано
28Journal of Alloys and Compounds, Год журнала: 2023, Номер 939, С. 168738 - 168738
Опубликована: Янв. 5, 2023
Язык: Английский
Процитировано
25New Carbon Materials, Год журнала: 2023, Номер 38(1), С. 1 - 15
Опубликована: Фев. 1, 2023
Язык: Английский
Процитировано
23