Stabilizing V₂O₃ in carbon nanofiber flexible films for ultrastable potassium storage

Abstract

Vanadium oxides, such as V2O3 and VO2, are expected to be potential anode materials for potassium-ion batteries (KIBs) on account of their high theoretical capacity, low price and natural abundance....

Highly Flexible K‐Intercalated MnO2/Carbon Membrane for High‐Performance Aqueous Zinc‐Ion Battery Cathode

“…[ 15a ] The C 1s spectrum in Figure S2d exhibits the presence of CC (284.8 eV), COMn (286.3 eV), and CO (288.7 eV), respectively. [ 18b ] These results confirm the successful synthesis of KMO/CNFs with a potential in accelerating the zinc storage performance.…”

“…KMO/CNFs was synthesized based on the electrospinning technique in our laboratory for flexible carbon‐based membrane. [ 18 ] The zinc (Zn)‐containing polyacrylonitrile (PAN) membrane (denoted as Zn/PAN membrane) was first synthesized by the electrospinning technique with the mixed solution of zinc acetate and PAN. Second, Zn/PAN membrane was put into methanol containing 2‐methylimidazole, and ZIF‐8 grew on the surface of PAN owing to the self‐assembly of 2‐methylimidazole and Zn 2+ diffusing slowly from the Zn/PAN membrane (denoted as ZIF‐8/PAN membrane).…”

Surface Redox Pseudocapacitance Boosting Vanadium Nitride for High‐Power and Ultra‐Stable Potassium‐Ion Capacitors

“…The irreversible reduction peak around 1.3 V in the 1st cycle could be attributed to the irreversible reaction between K + and the surface vanadium oxides. [ 39,40 ] The coincidence between the 2nd and 3rd CV curves indicates the ideal reversibility of VN@CFs‐550 during the potassiation/depotassiation process. The two reversible peaks located at 0.88 and 0.34 V are observed in the cathodic sweep of VN@CFs‐550, which may belong to the redox reactions related to the two V species bonding with the N 3– and O 2– , respectively.…”

Impregnating ultrafine FeS2 nanoparticles within hierarchical carbon tubes for advanced potassium-ion batteries

“…3f can be divided into two peaks at 284.8 and 286.0 eV corresponding to C-C/CvC and CvO, respectively. [39][40][41] The half-cell performance of FeS 2 -C@CTs and FeS 2 -C is demonstrated in Fig. 4 where the latter acted as a control.…”

“…3f can be divided into two peaks at 284.8 and 286.0 eV corresponding to C–C/CC and CO, respectively. 39–41…”