A Li⁺ and PANI co-intercalation strategy for hydrated V₂O₅ to enhance zinc ion storage performance

Abstract

Layered vanadium-based oxides are regarded as promising cathode material for zinc-ion batteries (ZIBs), due to their open-framework crystal structure and high theoretical specific capacity. However, the sluggish Zn2+ diffusion and...

Ce ions and polyaniline co-intercalation into MOF-derived porous V2O5 nanosheets with a synergistic energy storage mechanism for high-capacity and super-stable aqueous zinc-ion batteries

“…However, like the V 2 O 5 cathode, the CVO cathode also showed a rapid capacity decay, which was mainly due to the irreversible structural deterioration of the host material caused by the repeated insertion/extraction of Zn 2+ , eventually resulting in the collapse of the structure and capacity attenuation. 26 In contrast, the CPVO cathode not only exhibited the highest discharge capacity of 498.5 mA h g −1 at 0.1 A g −1 but also possessed the optimal cycling stability (98.9% capacity retention over 100 cycles), which may be associated with the abundant electrochemical active sites and fast Zn 2+ diffusion kinetics of the CPVO nanosheets. Meanwhile, the co-intercalation of Ce ions and PANI could effectively buffer the large volume variation and alleviate the collapse and dissolution of the host structure, thereby achieving excellent Zn 2+ storage performance.…”

“…25 Although these methods have achieved encouraging achievements, the guest ions inserted into the V 2 O 5 electrode tend to exhibit poor electronic conductivity, leading to unsatisfactory Zn 2+ diffusion kinetics. 26 In addition, the strong electrostatic interaction between divalent Zn 2+ and the host structure inevitably hinders the intercalation/deintercalation behavior, resulting in limited Zn 2+ storage performance. 27 Recent reports have suggested that the intercalation of conducting polymers (e.g., polyaniline, polypyrrole and poly (3,4-ethylenedioxythiophene)) in the V 2 O 5 framework can signicantly expand its layer spacing and weaken the electrostatic interaction.…”

Single‐Ion‐Conducting Hydrogel Electrolytes Based on Slide‐Ring Pseudo‐Polyrotaxane for Ultralong‐Cycling Flexible Zinc‐Ion Batteries

“…Synthesis of a La-V 2 O 5 : In the La-V 2 O 5 synthesis procedure, [44,80] 0.364 g V 2 O 5 and 0.130 g La(NO 3 ) 3 were dissolved in 50 mL deionized water. After stirring at 40 °C for 10 min, 2 mL H 2 O 2 was instilled into the above slurry.…”

Dual Effects of Metal and Organic Ions Co‐Intercalation Boosting the Kinetics and Stability of Hydrated Vanadate Cathodes for Aqueous Zinc‐Ion Batteries

“…However, the metal ions inserted V 2 O 5 electrodes often suffer from poor electronic conductivity. [ 15,16 ]…”

“…However, the metal ions inserted V 2 O 5 electrodes often suffer from poor electronic conductivity. [15,16] Guest species must be considered to realize stable structure, fast charge transfer and reversible migration of Zn 2+ in the layered structure during the charge/discharge process. The organic ions, which could develop weak interaction with Zn 2+ , were also introduced into layered cathode materials to boost the zinc-storage properties.…”