Strategies of structural and defect engineering for high-performance rechargeable aqueous zinc-ion batteries

Abstract

Aqueous zinc ion batteries (ZIBs) have gained tremendous attention in recent years due to the low cost, high safety and high abundance of zinc in natural resources. However, the practical...

Boosted Zn2+ storage performance of hydrated vanadium oxide by defect and heterostructure

“…5 Among these, the cathode material has been deeply recognized to hold the key to the solution because its properties directly determine the performance of ZIBs. [6][7][8] Thus, nding suitable cathode materials is the primary task to overcome the sticking points of the current ZIBs.…”

Thermally encapsulated phenothiazine@MWCNT cathode for aqueous zinc ion battery

“…Zinc metal offers, as an anode, very low reduction potential (À0.76 V vs. SHE) compared to other metals in an aqueous system and it possesses a twoelectron mechanism that essentially increases the energy density of the battery. [11][12][13] Many inorganic cathode materials like oxides of manganese, vanadium, iron, and others such as Prussian blue, etc., have been reported for aqueous zinc ion batteries. 14 The reversible (de)insertion of relatively large hydrated zinc ions is difficult to accommodate inside the specific lattice structures of these materials.…”

“…Zinc metal offers, as an anode, very low reduction potential (−0.76 V vs. SHE) compared to other metals in an aqueous system and it possesses a two-electron mechanism that essentially increases the energy density of the battery. 11–13…”

Structural Regulation of Oxygen Vacancy‐Rich K0.5Mn2O4Cathode by Carbon Hybridization for Enhanced Zinc‐Ion Energy Storage

“…Vacancy engineering is an efficient technology to improve internal charge carrier density by acting as electron donors to promote electron transport and lowering ion absorption energy to facilitate ion transport. [11][12][13] Therefore, enhanced energy storage kinetics can be achieved by the introduction of vacancies. Furthermore, the presence of vacancies in the electrode materials could enrich the sites for cations, resulting in the enhanced specific capacity.…”

“…The inherently low electronic/ionic conduction of these compounds limits electron/ion transport, causing sluggish dynamics and inferior cycling and rate properties. Vacancy engineering is an efficient technology to improve internal charge carrier density by acting as electron donors to promote electron transport and lowering ion absorption energy to facilitate ion transport [11–13] . Therefore, enhanced energy storage kinetics can be achieved by the introduction of vacancies.…”