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Hexagon holes MXene with polyvalent titanium interface enabled ultra-stable storage of potassium-ions
Shaofei Chao1, Man Xu1, Yanhui Xue1
1School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou 121001 China.
Abstract:
In order to prevent the energy density attenuation caused by MXene Ti3C2 fragmentation during the long period potassium-ions storage in aqueous systems, the hexagon holes Ti3C2 are constructed by using the coordination strategy of defect tuning and in-situ micro-oxidation. Through experiments and theoretical calculations,it is proved that Ti4+-O-K-Ti2+/3+ polyvalent titanium interfaces improve the reaction kinetics, enhance the adsorption activity for potassium-ions, and decrease the adsorption energy barrier. The antioxidant mechanism of hexagon holes Ti3C2 with polyvalent titanium for potassium-ions storage in aqueous system is revealed. This provides a new way for the practical application of ultra-stable potassium-ions storage.
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