材料科学
阳极
成核
钝化
电解质
枝晶(数学)
化学工程
离子
扩散
电偶阳极
水溶液
无机化学
纳米技术
电极
物理化学
图层(电子)
阴极保护
化学
有机化学
热力学
工程类
数学
几何学
物理
作者
Bin Luo,Yang Wang,Sinan Zheng,Leilei Sun,Guosheng Duan,Jianguo Lu,Jingyun Huang,Zhizhen Ye
标识
DOI:10.1016/j.ensm.2022.07.010
摘要
The practical application of aqueous Zn-ion batteries (AZIBs) has been limited by the notorious dendrite growth and side reactions of Zn anode, despite their high theoretical capacity, low cost, and intrinsic safety in large-scale energy storage. Herein, the tetracyanoquinodimethane anions (TCNQ2−) modified Zn anode ([email protected]) is fabricated via in-situ interfacial etching of Zn by TCNQ, which induces more exposure of Zn (101) planes. Benefitting from the abundant cyano group of TCNQ2−, the TCNQ2− can serve as an ion pump to continuously pump Zn2+ in electrolyte for uniform Zn nucleation deposition on the exposed (101) surface. Simultaneously, owing to the significantly higher migration barrier on TCNQ2− modified Zn (101) than (002), the 2D diffusion on the Zn (101) can be effectively inhibited, inducing 3D diffusion on Zn (002) to form the ordered (002) deposition orientation. These ordered Zn (002) textures significantly restrain the Zn dendrite formation and passivation reaction. Due to the synergistic effects of surficial ion pumping and atomic anchoring, the [email protected] anode exhibits remarkable cycling stability over 2000 h at different current densities (1, 5, and 10 mA cm−2). This work provides new theoretical guidance for highly stable reversible Zn metal anodes.
科研通智能强力驱动
Strongly Powered by AbleSci AI