Tuning the electronic structure of layered vanadium pentoxide by pre-intercalation of potassium ions for superior room/low-temperature aqueous zinc-ion batteries

Abstract

Aqueous zinc-ion batteries (ZIBs), due to their sluggish Zn2+ diffusion kinetics, continue to face challenges in terms of achieving superior high rate, long-term cycling and low-temperature properties.

Interfacial Kinetics Regulation of MoS2/Cu2Se Nanosheets toward Superior High‐Rate and Ultralong‐Lifespan Sodium‐Ion Half/Full Batteries

“…Firstly, the CV curves at different scan rate are displayed in Figure 4a, where the oxidation peak (peaks 1-3) and the reduction peak (peaks 4-6), respectively, shift to higher and lower potentials with the enhancement of the sweep rate from 0.2 to 1.0 mV s À 1 , which is resulted from the enlarged electrode polarization. [40] There is a relationship between the current of these peaks and the sweep rate: i = av b , in which a and b are variables.. [41,42] Generally speaking, the value of b is between 0.5 and 1, which can reflect that the electrochemical behavior of the electrode is controlled by capacitance or diffusion. [43] Figure 4b exhibits that the b values of peaks 1-6 are 0.68, 1, 0.71, 0.74, 0.98, and 0.79, respectively, which suggests the storage of Na + in the electrode is controlled by a hybrid mechanism of capacitance effect and diffusion process.…”

Ultrafast Lithium‐Ion Batteries with Long‐Term Cycling Performance Based on Titanium Carbide/3D Interconnected Porous Carbon

“…Rechargeable batteries emerge as electronic devices continue to boom. Amongst them, Lithium‐ion battery (LIB), due to distinct advantages like high energy density and portable characteristics, has become the most widely marketed battery [1–5] . LIB′s ability to provide superfast charging for the electric vehicles is one of the main limiting parameters.…”

Phosphorus–carbon covalent bond induced kinetics modulation of vanadium diphosphide for room- and high-temperature sodium-ion batteries

“…Driven by the strengths of abundant natural reserves and low cost, sodium is a potential alternative to lithium in rechargeable batteries, especially in energy storage systems on a large scale. [1][2][3][4][5][6] When applied in sodium-ion batteries (NIBs), the sodium shows a very desired electrochemical redox potential, i.e., À2.71 V vs. the standard hydrogen electrode (SHE), which approximates that of lithium and thus is beneficial to the realization of high-energy density. [7][8][9][10][11][12] With these outstanding merits, NIBs occupy a vital position in the field of rechargeable batteries.…”