Observation of combination displacement/intercalation reaction in aqueous zinc-ion battery

Highly Reversible Phase Transition Endows V6O13 with Enhanced Performance as Aqueous Zinc‐Ion Battery Cathode

“…The cyclic voltammetry (CV) profiles in Figure a manifest several reduction peaks located at 0.55, 0.70, 0.86, and 0.95 V and the oxidation peaks at 0.64, 0.79, 1.01, and 1.09 V, demonstrating the multiple insertion/extraction process of Zn 2+ storage in V 6 O 13 . It can be observed that the first CV curve displays some variation when compared to the latter curves, which could be due to the activation process . The V 6 O 13 electrode demonstrates excellent rate performance (Figure b,c) up to 10 A g −1 .…”

“…Note that no similar phenomenon was detected in any previous reports on vanadium oxides in aqueous ZIB systems, which could be attributed to the unique open structure of V 6 O 13 . And the phase transition process was well illustrated to maintain great structural stability during cycling . It can be reasonably speculated that the highly reversible phase transition process of Zn 0.25 V 2 O 5 ·H 2 O is responsible for the brilliant electrochemical behavior of V 6 O 13 .…”

In Situ Ag Nanoparticles Reinforced Pseudo‐Zn–Air Reaction Boosting Ag2V4O11 as High‐Performance Cathode Material for Aqueous Zinc‐Ion Batteries

“…Aforementioned tests and discussions provide hard evidence for the formation of BZS and in situ Ag nanoparticles. Despite being influenced by abundant heavy Ag ions (the mole ratio of Ag:V is 1:2), Ag 2 V 4 O 11 still delivers considerable specific capacity comparing with reported silver vanadate‐based cathodes (Table S1, Supporting Information) . It can be ascribed to the enhancement of conductivity and extra pseudo‐Zn–air reaction of Ag nanoparticles.…”

“…Perhaps considering the high conductivity of Ag, several silver vanadates were recently reported as cathode material for AZIBs, while the emergence of Ag was also observed. By comparing with these materials, our AVO delivers a comparable specific capacity, although the AVO is burdened by the highest percentage of silver element in the compounds, as illustrated in Table S1 in the Supporting Information . The presence of Ag nanoparticles may benefit in pseudo‐Zn–air reaction that is in favor of an enhanced electrochemical performance.…”

One‐Dimensional MnO2 Nanowires Space‐Confined in Hollow Mesoporous Carbon Nanotubes for Enhanced Zn2+ Storage Performance

“…It is of grave importance to find suitable cathode materials for Zn storage. At present, only a few materials are used as cathode electrodes for zinc-ion batteries: (1) Manganese-based materials, [4,[39][40][41][42] (2) Vanadium-based materials, [43][44][45][46][47] (3) Prussian blue analogs-based materials, [48] (4) Organic electrodes, [49,50] (5) Other Cathode Materials. [51,52] MnO 2 , as a representative energy storage material, has been widely concerned due to the structural tunability and Zn 2 + storage in ZIBs.…”