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Mingli Ding; Zhang, Xinyue; Zhang, Wu
Russian journal of electrochemistry, 2024/6, Volume: 60, Issue: 6Journal Article
We demonstrated a mechanochemically-assisted approach to synthesize Ti 3 C 2 T x MXene with crinkled morphology with enhanced energy storage performance. The fabrication efficiency and capacitive property of the resulting Ti 3 C 2 T x MXene was significantly promoted under the aid of a high-energy ball mill: (i) removal of Al from pristine Ti 3 AlC 2 powder was achieved after 8 h of etching in 2% hydrochloric acid, while 18 h was sufficient in 5% hydrochloric acid for conventional experimental as reported in previous literature; (ii) the capacitive property of the as-prepared samples increases with etching time, the 8-h mechanochemically etched sample showed a specific capacitance of 129 F/g at 10 mV/s in 1 M H 2 SO 4 electrolyte, while no typical energy storage behavior was found for the sample without mechanochemical aid. The contribution of double layer, pseudocapacitive and diffusion-limited capacitance for the total specific capacitance was quantitively analyzed for the first time. The as-prepared sample exhibits higher specific capacitance than the previously reported MXene and MXene-based composites. The mechanochemically-assisted approach showed good capability in preparing Ti 3 C 2 T x MXene with enhanced capacitive property.
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