Developing WO3 as high-performance anode material for lithium-ion batteries

WO3·nH2O Crystals with Controllable Morphology/Phase and Their Optical Absorption Properties

“…1−8 Particularly, the synthesis of transition-metal oxides (TMOs) with controllable morphology and crystal phase has gotten widespread international attention because of the strongly determined physical and chemical properties of TMOs. 9−13 Among these TMOs, tungsten trioxide and its hydrates (WO 3 •nH 2 O) have been widely investigated owing to their distinct optical and electrical properties and the functional applications in photocatalytic degradation, 14 gas sensors, 15 water splitting, 16,17 supercapacitors, 18 lithium ion batteries, 19,20 and electro/opto/gasochromic devices. 21 Over the past two decades, many approaches, such as spray pyrolysis, 22 sol−gel, 23 anodization, 24 thermal decomposition, 25 microemulsion technique, 26 chemical vapor deposition, 27 hydro/solvothermal reactions, 28−30 etc., have been used to prepare WO 3 •nH 2 O crystals with various morphologies/ phases.…”

“…The controllable preparation of crystals is a challenging issue in the field of chemistry and materials. − Particularly, the synthesis of transition-metal oxides (TMOs) with controllable morphology and crystal phase has gotten widespread international attention because of the strongly determined physical and chemical properties of TMOs. − Among these TMOs, tungsten trioxide and its hydrates (WO 3 · n H 2 O) have been widely investigated owing to their distinct optical and electrical properties and the functional applications in photocatalytic degradation, gas sensors, water splitting, , supercapacitors, lithium ion batteries, , and electro/opto/gasochromic devices …”

The Cycle Stability and Rate Performance of LiNi0.8Mn0.1Co0.1O2 Enhanced by Mg Doping and LiFePO4 Coating

“…In addition, after deep delithiation, Mg 2 + can serve as a "pillar" of the transition metal layer, reducing the repulsion between O 2À À O 2À and improving the bond energy of OÀ MÀ O, effectively preventing structural collapse and improving material cycle stability due to lattice shrinkage. [23] Surface coating can inhibit unexpected reactions at the interface between material and electrolyte in effect, and increase the structural stability of the surface and interface, thereby improving the capacity retention rate and safety of materials, for instance, WO 3 , [24] TiO 2 , [25] Al 2 O 3 , [26] and ZrO 2 . [27] Although non-electroactive coatings can serve the above purpose, their inertia reduces the lithium-ion mobility of the material.…”

Density‐modulated multilayered homo‐junction tungsten oxide anode materials for high‐capacity Li‐ion batteries with long‐term stability

“…15,16 To overcome these drawbacks, it is necessary to further increase the electrical conductivity and alleviate the intrinsic stress. 17 Considerable effort has been made to develop nanostructured composite film electrodes to enhance the energy storage properties of LIBs. Nanostructured electrodes have great potential towards achieving excellent electrochemical performances due to significant enhancements of their electrochemically active surface area and improved chemical activity.…”

“…However, the practical application of WO x as a LIB anode material is severely hindered by the poor capacity retention, low electrical conductivity, and volume expansion during the cycling process 15,16 . To overcome these drawbacks, it is necessary to further increase the electrical conductivity and alleviate the intrinsic stress 17 …”