A new active NaVMoO6 cathode material for rechargeable Li ion batteries

作者：Huang, Chunmao; Liu, Shenghong; Wang, Yang; Feng, Jingjie; Zhao, Yanming^*

来源：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2021, 66: 97-102.

DOI：10.1016/j.jmst.2020.06.022

• Lithium-ion batteries
• Cathode materials
• Electrochemical properties
• Storage mechanism

Brannerite-type NaVMoO6 with vanadium (V5+) and molybdenum (Mo6+) elements in the highest valence states is synthesized by a sol-gel method using Na2CO3, NH4VO3, MoO2 and citric acid reagents. The results of X-ray diffraction (XRD) with Rietveld refinement and X-ray photoelectron spectroscopy (XPS) show that the obtained NaVMoO6 sample is single-phase. Novel electrode material (NaVMoO6) with layered structure is first utilized as cathode material for lithium ion batteries (LIBs). The NaVMoO6 electrode delivers reversible specific capacity of 126.4 mA h g(-1) at 5 mA g(-1) after 50 cycles. The stable structure of NaVMoO6 is corroborated by ex-situ XRD, suggesting that this material is considered as a prospective cathode for LIBs. This studying enriches the possibilities of molybdenum-based materials as cathodes for LIBs.