VSe2/MXene composite with hierarchical three-dimensional structure encapsulated in dopamine as an anode for potassium-ion batteries

Recent advances and promise of MXene-based composites as electrode materials for sodium-ion and potassium-ion batteries

“…11 To address the aforementioned challenges, extensive research has been conducted on the rational design and the selection of electrode composite materials. Unlike conventional 2D nanomaterials such as graphene, 36 borophene, 37 silicon, 38 and black phosphorus, 39 MXenes exhibit a wide range of chemical compositions and atomic-scale structural arrangements, 40,41 resulting in unique properties including metallic conductivity, 42,43 adjustable band gaps, 44 a substantial redox-active surface area, 45,46 remarkable mechanical stability, 47,48 and flexibility. 49,50 MXene is predominantly found in two forms: multilayer and single-layer structures.…”

Rational construction of VSe2encapsulated in selenized polyacrylonitrile toward a high-rate capacity and wide temperature tolerance for potassium-ion batteries

“…This phenomenon further implies the persistence of the conversion reaction and verifies the electrode's reaction mechanism with K + + VSe 2 ↔ K x VSe 2 ↔ V + K 2 Se. 20,23,[50][51][52][53][54][55][56][57][58][59][60][61][62][63] Additional evidence for the existence of V, Se, N, and K was provided by EDS mapping of the completely discharged state.…”

“…So far, vanadium selenide confinement in conductive carbon nano-architectures has been shown to be the most effective technique. [21][22][23] Nevertheless, carbon and selenide have fundamentally weak physical interactions. 24,25 Intermediate potassium polyselenides can still release and dissolve into the electrolyte.…”

Nitrogen-Doping-Induced High-Performance Carbon Nanofiber Anodes for Potassium-Ion Storage

“…In recent years, many kinds of anode materials, such as carbon, − polynanocrystalline graphite, nitrogen-doped graphene, transition metal oxides/sulfides/selenides, − and phosphorus-based alloy materials, , have been evaluated as anode materials for PIBs. Among them, carbonaceous materials with heteroatom-doping have attracted much attention owning to the low preparation cost and the extensive range of sources. , Nevertheless, the electrochemical performance of carbon-based anode materials is still unsatisfactory and the exploration of high-performance carbonaceous anode materials is highly desired.…”