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首页> 外文期刊>Advanced functional materials >Cu-Modified Ti_3C_2Cl_2 Mxene with Zincophilic and Hydrophobic Characteristics as a Protective Coating for Highly Stable Zn Anode
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Cu-Modified Ti_3C_2Cl_2 Mxene with Zincophilic and Hydrophobic Characteristics as a Protective Coating for Highly Stable Zn Anode

机译：Cu-Modified Ti_3C_2Cl_2 Mxene with Zincophilic and Hydrophobic Characteristics as a Protective Coating for Highly Stable Zn Anode

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摘要

Zn anode is a promising candidate for aqueous batteries, but suffers fromthe dendrite growth and side reaction issues, leading to short cycling lifeand unsatisfactory reversibility. Herein, a Cu-modified Ti_3C_2Cl_2 MXene(Cu-MXene) with high zincophilic and hydrophobic property is prepared witha one-step molten salt etching method. Serving as a protective coating onZn anode, the Cu-MXene can provide massive nucleation sites and uniformizethe charge distribution, leading to homogenous Zn deposition. Moreover,the hydrophobic coating can prevent the Zn anode from the aqueouselectrolyte, beneficial for suppressing the side reactions such as hydrogenevolution reaction and corrosion. Therefore, the stable and reversible Znplating/stripping is achieved for the Zn anode coated by the Cu-MXene,which delivers an extended cycling life of over 1000 h with a low polarizationwithin 120 mV at 10 mA cm~(?2), and a high coulombic efficiency of over 99.6for 1100 cycles, indicating excellent stability and reversibility of Zn stripping/plating. The practical full cell coupled with NaV_3O_8·1.5H_2O cathode alsodisplays stable performance for 1000 cycles. The proposed Cu-MXene coatingreveals a promising prospect for designing highly stable Zn anode, which canalso be extended to other energy storage systems based on metal anodes.

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