Preparation method of Ti2CMXene-based battery electrode material

Abstract

The invention discloses a preparation method of a Ti2CMXene-based battery electrode material. A Ti2CMXene film material is prepared. Through intercalation and exfoliation, the interlayer spacing is enlarged, and the material has a high specific surface area, good conductivity, good cycling stability and rate capability. Meanwhile, the MXene material which is intercalated has low ion diffusion resistance, low open-circuit voltage and high storage capacity, so that the MXene material is quite suitable for being applied to an electrode material of an energy storage apparatus such as a lithium battery and a supercapacitor. The preparation method disclosed by the invention is simple in process and low in cost and does not generate exhaust gas and exhaust liquids polluting the environment. The Ti2C film material prepared by the preparation method is good in conductivity and large in specific surface area. As the electrode material, the Ti2C film material has good cycling stability and rate capability. The specific capacity of the prepared battery is greatly enhanced compared with that of the battery prepared from a conventional material.

Description

technical field [0001] The invention relates to the field of material chemistry, in particular to a Ti-based 2 The preparation method of C MXene battery electrode material. Background technique [0002] Energy and environmental issues are two major problems that human beings need to solve urgently. Today, with the depletion of fossil energy, increasingly serious environmental pollution, and global warming, it is particularly urgent to seek renewable green energy to replace traditional fossil energy and to seek harmony between man and the environment. For new, green, energy storage devices, while concerned about their greenness, high power density and high energy density are important indicators of whether they can truly replace traditional energy storage and transportation systems. New power supply systems, especially secondary batteries or supercapacitors are currently important green energy storage devices, and the core part of them is energy storage materials with excel...

AI Technical Summary

Problems solved by technology

In recent years, a new wave of research on sodium-ion batteries has been set off. Since the radius of sodium ions is larger than that of lithium ions, graphite carbon anode materials that have been commercially used in lithium-ion batteries cannot meet the requirements due to their small interlayer spacing (0.335nm). The free deintercalation of sodium ions cannot be applied to sodium-ion batteries

However, the supercapacitors currently on the market have low power density and poor cycle stability.

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