1. 3D Porous Copper Skeleton Supported Zinc Anode toward High Capacity and Long Cycle Life Zinc Ion Batteries
- Author
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Zhuang Kang, Guoxiu Wang, Feiyu Kang, Changle Wu, Jian Mou, Chengjun Xu, Wenbao Liu, Ziwen Chang, Jingwen Zhang, Baozheng Jiang, and Liubing Dong
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Galvanic anode ,General Chemical Engineering ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Zinc ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Copper ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,Chemical engineering ,chemistry ,law ,Environmental Chemistry ,0210 nano-technology ,Polarization (electrochemistry) ,Faraday efficiency ,Nanosheet - Abstract
© 2019 American Chemical Society. Zinc ion batteries (ZIBs) have attracted extensive attention in recent years, benefiting from their high safety, eco-friendliness, low cost, and high energy density. Although many cathode materials for ZIBs have been developed, the poor stability of zinc anodes caused by uneven deposition/stripping of zinc has inevitably limited the practical application of ZIBs. Herein, we report a highly stable 3D Zn anode prepared by electrodepositing Zn on a chemically etched porous copper skeleton. The inherent excellent electrical conductivity and open structure of the 3D porous copper skeleton ensure the uniform deposition/stripping of Zn. The 3D Zn anode exhibits reduced polarization, stable cycling performance, and almost 100% Coulombic efficiency as well as fast electrochemical kinetics during repeated Zn deposition/stripping processes for 350 h. Furthermore, full cells with a 3D Zn anode, ultrathin MnO2 nanosheet cathode, and Zn2+-containing aqueous electrolyte delivered a record-high capacity of 364 mAh g-1 at a current density of 0.1 A g-1 and good cycling stability with a retained capacity of 173 mAh g-1 after 300 charge/discharge cycles at 0.4 A g-1. This work provides a pathway for developing high-performance ZIBs.
- Published
- 2019