Electrospinning synthesis of amorphous NiMoO₄/graphene dendritic nanofibers as excellent anodes for sodium ion batteries

Abstract

Metal molybdates have attracted considerable attention as promising anode materials for sodium ion batteries (SIBs) due to their high theoretical specific capacity and excellent electrochemical performance. However, their low rate capacity and rapid capacity attenuation hinder their application in SIBs. Here, amorphous NiMoO4/graphene nanofibers were prepared via an electrospinning method. The electrochemical performance of NiMoO4 was first reported as the anode for SIBs. Amazingly, the amorphous NiMoO4/graphene delivered an outstanding specific capacity of 260 mAh g−1 after 100 cycles at 100 mA g−1 at a potential range from 0.01–2.7 V and an excellent rate performance of 160 mAh g−1 at 1 A g−1. The superior electrochemical properties of amorphous NiMoO4 can be ascribed to its amorphous structure and reduced diffusion distance, and the strong synergy of NiMoO4 and graphene.

Boosting the Initial Coulomb Efficiency of Sisal Fiber-Derived Carbon Anode for Sodium Ion Batteries by Microstructure Controlling

“…It is clear that the TSFC anode material possesses a higher ICE. In addition, the TSFC also has a higher ICE than that of some previously reported transition metal materials (such as NiMoO 4 [4] and MgMoO 4 [5]). For the stability of the electrode material structure, multiplicative performance tests were performed on three electrodes (as shown in Figure 4h).…”

“…As a result, a new technology has emerged in the field of energy storage-sodium ion batteries (SIBs), which have electrochemical properties similar to LIBs [1][2][3]. Researchers have focused on the following types of anode materials: titanium-based oxides, sodium alloys, binary transition metal oxides (such as NiMoO 4 [4] and MgMoO 4 [5]), and carbon materials. Among the carbon-based materials that have been widely studied are graphite, graphene, soft carbon, and hard carbon.…”