Metallic interface engi-neering is a promising strategy to sta-bilize Zn anode via promoting Zn2+uniform deposition.However,strong interactions between the coating and Zn2+and sluggish transport of Zn2+lead to high anodic polarization.Here,we present a bio-inspired silk fibroin(SF)coating with amphoteric charges to construct an interface reversible elec-tric field,which manipulates the trans-fer kinetics of Zn2+and reduces anodic polarization.The alternating positively and negatively charged surface as a build-in driving force can expedite and homogenize Zn2+flux via the inter-play between the charged coating and adsorbed ions,endowing the Zn-SF anode with low polarization voltage and stable plating/stripping.Experimental analyses with theo-retical calculations suggest that SF can facilitate the desolvation of[Zn(H2O)6]2+and provide nucleation sites for uniform deposition.Consequently,the Zn-SF anode delivers a high-rate performance with low voltage polarization(83 mV at 20 mA cm-2)and excellent stability(1500 h at 1 mA cm-2;500 h at 10 mA cm-2),realizing exceptional cumulative capacity of 2.5 Ah cm-2.The full cell coupled with ZnxV2O5·nH2O(ZnVO)cathode achieves specific energy of-270.5/150.6 Wh kg-1(at 0.5/10 A g-1)with-99.8％Coulombic efficiency and retains-80.3％(at 5.0 A g-1)after 3000 cycles.

Meihua Zhu;Qing Ran;Houhou Huang;Yunfei Xie;Mengxiao Zhong;Geyu Lu;Fu-Quan Bai;Xing-You Lang;Xiaoteng Jia;Danming Chao

College of Chemistry,Jilin University,Changchun 130012,People's Republic of China;Key Laboratory of Automobile Materials,Ministry of Education,School of Materials Science and Engineering,Jilin University,Changchun 130022,People's Republic of China;State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,People's Republic of China

纳微快报（英文）

[1]Meihua Zhu;Qing Ran;Houhou Huang;Yunfei Xie;Mengxiao Zhong;Geyu Lu;Fu-Quan Bai;Xing-You Lang;Xiaoteng Jia;Danming Chao-.Interface Reversible Electric Field Regulated by Amphoteric Charged Protein-Based Coating Toward High-Rate and Robust Zn Anode)[J].纳微快报（英文）,2022(12):535-548

Amphoteric,Zn2+uniform,Zn2+lead,amphoteric,Zn2+flux,ZnVO

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