Preparation of polyaniline intercalated V2O5 composites and study of their self-charging mechanism

Recent development of manganese dioxide-based materials as zinc-ion battery cathode

“…Organic molecules can weaken the electrostatic interaction between Zn 2+ and oxides and enhance the reversibility of ion deintercalation. 196,197 Meanwhile, due to their high conductivity, they can also improve the conductivity of cathode materials. Chen et al creatively inserted poly(3,4-ethylene dioxythiophene) into the MnO 2 layer (PEDOT-MnO 2 ) through a redox precipitation reaction between KMnO 4 , MnSO 4, and EDOT.…”

Organic Species-Intercalated Vanadium Oxide for Sodium-Ion Battery: Mixed-Anion Coordination Effect, Enhanced d-p Orbital Hybridization, and Topotactic Phase Conversion Induced by N-Substitution

“…For example, the polyaniline (PANI)-intercalation strategy was reported to relieve the electrostatic interactions between Zn 2+ and lattice oxygen of V 2 O 5 , thus accelerating the kinetics of Zn 2+ transportation. 16,17 Moreover, preinserting redox-active organic quinone-type molecules into layered V 2 O 5 can also improve the capacities due to the keto-phenol conversion. 18,19 Although encouraging achievements have been made, there is still much room to improve the electrochemical performances of vanadium-based cathode materials in SIBs.…”

“…In recent years, due to the intrinsic advantages of abundant Na resource, low cost, and similar physical and chemical properties as lithium-ion batteries (LIBs), sodium-ion batteries (SIBs) have captured widespread attention. , However, due to the larger radius and heavier molar mass of Na + than Li + , the practical performances of SIBs are limited by suitable electrode materials, especially for cathode materials. − Among the promising cathode materials, layered vanadium-based materials such as V 2 O 5 (high theoretical capacity: 589 mAh g –1 ) have attracted more and more interest due to the advantages of abundant sources and low cost. − More importantly, the interlayer spacing of V 2 O 5 can be enlarged by preinserting metal ions, which can not only expose more interstitial sites for the (de)­intercalation of lithium or sodium ions but also accelerate the reaction kinetics. − A series of M x V 2 O 5 (M = Li, Na, K, Mg, Ca) with expanded interlayer spacings have been reported, which can achieve high initial capacity and superior capacity retention in LIBs or SIBs. − Organic compounds can also be employed as interlayer pillars. For example, the polyaniline (PANI)-intercalation strategy was reported to relieve the electrostatic interactions between Zn 2+ and lattice oxygen of V 2 O 5 , thus accelerating the kinetics of Zn 2+ transportation. , Moreover, preinserting redox-active organic quinone-type molecules into layered V 2 O 5 can also improve the capacities due to the keto-phenol conversion. , …”