Details

Autor(en) / Beteiligte

• Xie, Xuesong
• Liang, Shuquan
• Gao, Jiawei
• Guo, Shan
• Guo, Jiabao
• Wang, Chao
• Xu, Guiyin
• Wu, Xianwen
• Chen, Gen
• Zhou, Jiang

Titel

Manipulating the ion-transfer kinetics and interface stability for high-performance zinc metal anodes

Ist Teil von

• Energy & environmental science, 2020-01, Vol.13 (2), p.53-51

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The zinc metal is recognized as one of the most promising anodes for Zn-based batteries in an energy-storage system. However, the deposition and transfer of bivalent Zn 2+ into the host structure suffer from sluggish kinetics accompanying the side-reactions at the interface. Herein, we report a new class of Zn anodes modified by a three-dimensional (3D) nanoporous ZnO architecture coating on a Zn plate (designated as Zn@ZnO-3D) prepared by in situ Zn(OH) 4 2− deposition onto the surface. This novel structure has been proven to accelerate the kinetics of Zn 2+ transfer and deposition via the electrostatic attraction toward Zn 2+ rather than the hydrated one in the electrical double layer. As a consequence, it achieves an average 99.55% Zn utilization and long-time stability for 1000 cycles. Meanwhile, the Zn@ZnO-3D/MnO 2 cell shows no capacity fading after 500 cycles at 0.5 A g −1 with a specific capacity of 212.9 mA h g −1 . We believe that the mechanistic insight into the kinetics and thermodynamic properties of the Zn metal and the understanding of structure-interface-function relationships are very useful for other metal anodes in aqueous systems. We report a new class of Zn anodes modified by a three-dimensional nanoporous ZnO architecture (Zn@ZnO-3D), which can accelerate the kinetics of Zn 2+ transfer and deposition, inhibit dendrite growth, and reduce the side-reactions.