High energy density of multivalent glass‐ceramic cathodes for Li‐ion rechargeable cells and as an efficient photocatalyst for organic degradation

Abstract

The tavorite-structured materials remain unfathomed as positive electrodes in rechargeable batteries. Reasoning of this fact, borate, and silicate-based tavorites are investigated for utilization in Li-ion batteries (LIBs) and as a photocatalyst for organic contaminant degradation. The physiochemical, electrochemical, dielectric, and photoelectrochemical properties are analyzed to learn the fact that LiVBO 4 F has resulted in a glass-ceramic nature owing to the embodiment of boron oxyfluoride glasses. This nature has made them effective as cathodes even under sensitive mode operations compared to their counterpart. Additionally, a multiredox behaviour was witnessed for both the materials, which boosts the specific capacity for LIB system. Besides, LiVSiO 4 F display immense degradation efficiency for tetracycline, an organic contaminant. These materials unveil expedient properties, promising its multiple usage in the field of conversion cum storage devices as photoelectrodes and cathodes in LIBs. K E Y W O R D Scathode, dielectric, glass-ceramics, Li-ion battery, photocatalyst, tavorite

Band‐Gap Tuned Dilithium Terephthalate from Environmentally Hazardous Material for Sustainable Lithium Storage Systems with DFT Modelling

“…On the other hand, Li 2 TP shows the spectacles bond length ranges between 1.7 to 3.25 Å confirming the ionic nature. This result discloses the covalent nature of −OH bonds from TPA is converted into the ionic nature of −O−Li (1.8709 Å) bonds [51] . Computationally measured bond lengths of individual atoms of TPA and Li 2 TP are provided in Table S1.…”

“…This result discloses the covalent nature of À OH bonds from TPA is converted into the ionic nature of À OÀ Li (1.8709 Å) bonds. [51] Computationally measured bond lengths of individual atoms of TPA and Li 2 TP are provided in Table S1.…”

A low cost Zn2+/I− redox active electrolyte for a high energy and long cycle-life zinc hybrid battery–capacitor

“…Increasing the operating voltage of ASCs via the development of metal-ion hybrid battery capacitors (MHCs) consisting of a capacitor-type cathode and a battery-type anode (such as Li-, K-, Na-, or Zn-metal) is considered an effective strategy to improve the overall energy density. [10][11][12][13][14][15] Among the various MHCs, aqueous Zn-ion hybrid capacitors (ZHCs) are the most promising owing to the abundant natural resources of Zn metal, high theoretical capacity (820 mA h g −1 ), lower redox potential (than normal hydrogen electrodes), outstanding safety, and environmental benignity. [16][17][18][19][20][21] Particularly, studies have demonstrated the simplicity and economic viability of ZHCs composed of activated porous carbon (PC) as a cathode, Zn foil as an anode, and aqueous Zn-electrolyte for energy storage via adsorption/desorption (ads/des), deposition/stripping and precipitation/dissolution mechanisms, respectively.…”