This review describes the advances of exploratory research on tungsten-based materials (tungsten oxide, tungsten sulfide, tungsten diselenide, and their composites) in lithium-ion batteries, including synthesis methods, microstructures, and electrochemical performance.
The search for anode materials with excellent electrochemical performances remains critical to the further development of lithium-ion batteries. Tungsten-based materials are receiving considerable attention as promising anode materials for lithium-ion batteries owing to their high intrinsic density and rich framework diversity.
From this respect, the doping/coating of tungsten and related elements, based on optimized process design and concentration selection, could provide significant strategies for the development and commercialization of these novel cathode materials for the state-of-the-art lithium ion batteries.
In this article, we reviewed the recent advances on coating and doping using tungsten and related elements including W, V, Nb, Ta and Mo to improve the electrochemical performances of layered cathode materials including NCM, NCA and ultrahigh Ni systems.
The foregoing discussions demonstrated that use of tungsten and related elements for doping/coating is a promising strategy to improve the cycle stability of the layer-structure cathode materials including NCM, NCA and ultrahigh Ni materials. The improvement was ascribed to the special properties of tungsten and related elements.
Currently, the Ni–Co–Mn ternary oxide materials (NCMs) and Ni–Co–Al materials (NCAs) are considered as the most ideal cathode materials to meet the strict requirements of lithium ion batteries (LIBs) in the short- to mid-term because of their high energy density, good cycling performance, safety performance and relatively low costs [1, 2, 3].