Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

Abstract

MoO 2 @N-doped C nanofibers (MoO 2 @NC NFs) were synthesized by electrospinning with polyacrylonitrile as carbon source. The in situ formed MoO 2 nanocrystals are completely embedded in the carbon nanofibers, which can not only accelerate ion transition, but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling. When used as the anode material for both Li/Na-ion batteries, the as-synthesized MoO 2 @NC NFs displayed excellent Li + /Na + storage properties. As the anode for Li-ion battery, the MoO 2 @NC NFs display a high discharge capacity of 930 mA h g −1 at a current density of 200 mA g −1 for 100 cycles, and 720 mA h g −1 at a current density of 1 A g −1 for 600 cycles. Moreover, the discharge capacity of 350 mA h g −1 could be realized at a current density of 100 mA g −1 for 200 cycles for Na-ion battery.

Nitrogen, Fluorine, and Boron Ternary Doped Carbon Fibers as Cathode Electrocatalysts for Zinc–Air Batteries

“…Synthesis of N, B, F TD‐CFs, and ND‐CFs : The carbon fibers were synthesized by electrospinning/annealing technique . First, 2 mmol ammonium tetrafluoroborate was dissolved in 4.6 g DMF, and then 0.4 g of PAN was added to the above solution, stirred at room temperature until a homogeneous solution was formed and then transferred into a 10 mL syringe.…”

Porous NaTi2(PO4)3 Nanocubes Anchored on Porous Carbon Nanosheets for High Performance Sodium-Ion Batteries

“…The electrochemical performance of SIBs is closely related to the properties of electrode materials, especially anode materials (Chen et al, 2018; Fan et al, 2018; Hu A. J. et al, 2018; Liang et al, 2018b,d; Wan et al, 2018; Wei et al, 2018). Recently, Na super ion conductor (NASICON) type NaTi 2 (PO 4 ) 3 has been considered as one of promising anode materials for SIBs owing to its “zero-stress” three-dimensional (3D) framework, high Na + conductivity, and good thermal stability (Kabbour et al, 2011; Wu et al, 2013; Sun et al, 2016; Ye et al, 2017).…”

Stabilization of LiV3O8 Rod‐like Structure by Protective Mg3(PO4)2Layer for Advanced Lithium Storage Cathodes

“…Benefitting from the protective MP layer, the capacities of as‐prepared samples retained 250, 235, 193 and 177 mAh g −1 after 50 cycles, at corresponding stepwise current densities. The latter was attributed to formation of MP coating layer, as well as inhibition of interface reaction between the cathode and electrolyte by MP coating layer …”