Current State and Prospect for Preparation of Magnéli Phase Titanium Oxides

Magnéli phase is a series of titanium sub-oxides with the general formula of Ti_ⁿO_2ⁿ-1（4≤ⁿ≤10）,which have excellent conductivity and great significance for battery research.At present,the main method for preparing Magnéli phase titanium oxides is high temperature reduction of TiO₂ or its precursors.Such method is complicated and time-consuming. In this paper,the preparation methods for Magnéli phase titanium oxides using carbon as reductant were introduced,and the microwave heating technology was introduced into the preparation process.The method with carbon reduction and microwave heating not only shortens the preparation process,but also makes the Magnéli phase titanium oxides obtained have smaller particle size and more regular shape. Finally,the prospect for preparation methods of Magnéli phase is put forward,providing references for research and application of such titanium oxides.