Carbon-Doped Vanadium Nitride Used as a Cathode of High-Performance Aqueous Zinc Ion Batteries

Abstract

Rechargeable aqueous zinc ion batteries (ZIBs) have been researched widely because of some special strengths of high safety, low cost, and high energy density. Nevertheless, aqueous zinc ion batteries still face imperfections such as low discharge voltage and poor cycling stability. Therefore, the synthesis of high-performance carbon-coated VN by reduction and nitrification of V2O5 in an NH3 atmosphere is proposed. The cathode material of carbon-doped VN (coral VN/C) has a specific capacity of 322 mAh g–1 at a current density of 0.5 A g–1, which benefit from the nanoscale size and porous, stacked structure. Furthermore, the battery maintains a specific capacity of 111 mAh g–1 and a capacity retention rate of 95% at a high current density of 15 A g–1 after 6780 cycles. These results prove that coral VN/C is a new excellent ZIB cathode material, which exhibits a high energy density and high cycle stability for the ZIB cathode material, and propose an excellent coral VN/C synthesis method.

Simultaneous pre-intercalation of caesium and sodium ions into vanadium oxide bronze nanowires for high-performance aqueous zinc-ion batteries

“…4c and Fig. S9, ESI†) can be further analyzed using the following equations: 45 i = k 1 ν + k 2 ν 1/2 i / ν 1/2 = k 1 ν 1/2 + k 2 Where k 1 and k 2 are adjustable parameters, while k 1 ν and k 2 ν 1/2 refer to the contribution of capacitive and diffusion-controlled processes, respectively. Fig.…”

How About Vanadium‐Based Compounds as Cathode Materials for Aqueous Zinc Ion Batteries?

“…d) Reproduced with permission. [ 418 ] Copyright 2021, American Chemical Society. e) Reproduced with permission.…”

Vanadium Nitride@nitrogen-Doped Graphene as Zinc Ion Battery Cathode with High Rate Capability and Long Cycle Stability

“…Because of the cationic conversion reactions and Zn 2+ insertion and extraction, the electrode presents a high specific capacity of 705 mA h g –1 at 0.2 A g –1 current density. Rong Yao and Su Qingsong from our team studied VN and VN/C materials as ZIBs cathode materials, and the results show that both materials have a high specific capacity and high stability. , However, the reported VN materials mainly use NH 3 as the nitrogen source, which is uneconomical and environmentally unfriendly. In addition, the poor conductivity of VN is also a challenge as an electrode material, and adding conductive carbon such as rGO and CNT can improve the electrode conductivity. − …”