(002)-织构锌阳极在无织构衬底上的非外延电沉积用于无枝晶和析氢抑制锌电池,Advanced Materials

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(002)-织构锌阳极在无织构衬底上的非外延电沉积用于无枝晶和析氢抑制锌电池
Advanced Materials ( IF 27.4 ) Pub Date : 2023-03-02 , DOI: 10.1002/adma.202300073
Jingmin Zhang _{1,

2} , Weiwei Huang ₃ , Longwei Li _{1,

2} , Caiyun Chang _{1,

4} , Kai Yang _{1,

4} , Lei Gao ₃ , Xiong Pu _{1,

2,

4}

Affiliation

无毒且安全的水系锌电池在很大程度上受到锌金属负极有害的枝晶生长和析氢的限制。(002)-织构化 Zn 电沉积被证明是解决这些问题的有效方法，但主要是通过在预织构化基板上外延或异质外延沉积 Zn 来实现的。在此，报道了在中高恒电流密度下，(002)-织构和致密 Zn 在无织构基底（商业 Zn、Cu 和 Ti 箔）上的电沉积。根据对 Zn 成核和生长行为的系统研究，这归因于两个原因：i）在增加的过电位下促进细水平（002）核的非外延成核和 ii）（002）取向核的竞争生长优势。^{-2在10 mA cm}^-2的电流密度和45.5%的高放电深度（DOD）下的累积容量。因此，本研究为长寿命锌金属电池提供了基础和实践见解。

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Nonepitaxial Electrodeposition of (002)-Textured Zn Anode on Textureless Substrates for Dendrite-Free and Hydrogen Evolution-Suppressed Zn Batteries

Nontoxic and safe aqueous Zn batteries are largely restricted by the detrimental dendrite growth and hydrogen evolution of Zn metal anode. The (002)-textured Zn electrodeposition, demonstrated as an effective approach for solving these issues, is nevertheless achieved mainly by epitaxial or hetero-epitaxial deposition of Zn on pre-textured substrates. Herein, the electrodeposition of (002)-textured and compact Zn on textureless substrates (commercial Zn, Cu, and Ti foils) at a medium-high galvanostatic current density is reported. According to the systematic investigations on Zn nucleation and growth behaviors, this is ascribed to two reasons: i) the promoted nonepitaxial nucleation of fine horizontal (002) nuclei at increased overpotential and ii) the competitive growth advantages of (002)-orientated nuclei. The resulting freestanding (002)-textured Zn film exhibits significantly suppressed hydrogen evolution and prolonged Zn plating–stripping cycling life, achieving over 2100 mAh cm⁻² cumulative capacity under a current density of 10 mA cm⁻² and a high depth of discharge (DOD) of 45.5%. Therefore, this study provides both fundamental and practical insights into long-life Zn metal batteries.

更新日期：2023-03-02

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