Interface Reversible Electric Field Regulated by Amphoteric Charged Protein-Based Coating Toward High-Rate and Robust Zn Anode  

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

机构地区：[1]College of Chemistry,Jilin University,Changchun 130012,People’s Republic of China [2]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,People’s Republic of China [3]Key Laboratory of Automobile Materials,Ministry of Education,School of Materials Science and Engineering,Jilin University,Changchun 130022,People’s Republic of China

出　　处：《Nano-Micro Letters》2022年第12期535-548,共14页纳微快报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.22275066,521032089,21774046,51871107,52130101 and 52271217);Jilin Provincial Science and Technology Department(20210508046RQ and 20200801057GH);China Postdoctoral Science Foundation(2021T140253 and 2021M691188);the Applied Basic Research Program of Changchun Municipal Science and Technology Project(21ZY22).

摘　　要：Metallic interface engineering is a promising strategy to stabilize Zn anode via promoting Zn^(2+) uniform deposition.However,strong interactions between the coating and Zn^(2+) and sluggish transport of Zn^(2+) lead to high anodic polarization.Here,we present a bio-inspired silk fibroin(SF)coating with amphoteric charges to construct an interface reversible electric field,which manipulates the transfer kinetics of Zn^(2+) and reduces anodic polarization.The alternating positively and negatively charged surface as a build-in driving force can expedite and homogenize Zn^(2+) 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(H_(2)O)_(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 Zn_(x)V_(2)O_(5)·nH_(2)O(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.

关 键 词：Silk fibroin coating Zn anode Amphoteric charge Interfacial engineering Aqueous zinc-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.542[理学—物理化学]