From vanadium slag to multi-cation-intercalated V₂O₅·nH₂O: low-cost direct synthesis and high-performance aqueous battery application

Abstract

Although hydrated vanadate compounds have received extensive attention in aqueous batteries for their high specific capacity, they are still impeded by the poor cycling resulting from host structure degradation and...

Activating ZnV2O4by an Electrochemical Oxidation Strategy for Enhanced Energy Storage in Zinc-Ion Batteries

“…In regard to cathode materials, vanadium-based oxides have been widely investigated due to their suitable open framework, controllable morphology, rich valence states, and stable cycle stability. , As such, the electrochemical performances of a variety of vanadium-based oxides such as layered vanadates, − V 3 O 7 , , V 6 O 13 , and VO 2 have been studied in RAZIBs. For instance, multi-cation intercalated hydrated vanadate prepared from vanadium slag demonstrates ultrahigh rate performance in RAZIBs . Recently, spinel oxides gain increasing attention due to their crystal stability, tunable atomic-scale structure, and suitable working voltage. , For instance, ZnMn 2 O 4 spinel oxide with structural defects exhibits facilitated ion diffusion kinetics, leading to promising Zn 2+ storage capability and stable cycle stability. , The presence of rich lattice water in ZnMn 2 O 4 demonstrates a reduced intercalation energy barrier, resulting in high-power performance .…”

“…For instance, multi-cation intercalated hydrated vanadate prepared from vanadium slag demonstrates ultrahigh rate performance in RAZIBs. 24 Recently, spinel oxides gain increasing attention due to their crystal stability, tunable atomic-scale structure, and suitable working voltage. 25,26 For instance, ZnMn 2 O 4 spinel oxide with structural defects exhibits facilitated ion diffusion kinetics, leading to promising Zn 2+ storage capability and stable cycle stability.…”

Yttrium-preintercalated layered manganese oxide as a durable cathode for aqueous zinc-ion batteries

“…By equivalent-circuit fitting, the R ct value was determined as 79 and 148 Ω for YMO-0.1 and MO, respectively. The smaller R ct value indicates better electrical conductivity of the cathode, 52,53 which is attributed to the narrower band gap of the YMO-0.1 sample (Fig. 2i).…”

Will Vanadium‐Based Electrode Materials Become the Future Choice for Metal‐Ion Batteries?

“…[68] Recently, Chen et al synthesized a multi-ion pre-co-intercalated hydrate vanadate (M x V 2 O 5 •nH 2 O) directly from vanadium slag waste, and the vanadate showed inspiring performance as the cathode material for zinc-ion batteries. [69] It has also been revealed that the cations in vanadium slag, such as Fe, Mg, and Ti, are beneficial in stabilizing the interlayer structure and improving the reaction kinetics.…”