Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 3, Pages 3364-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b05568
Keywords
Zinc anode; Porous copper skeleton; Zinc ion battery; MnO2 nanosheet
Categories
Funding
- Shenzhen Technical Plan Project [JCYJ20160301154114273]
- National Key Basic Research (973) Program of China [2014CB932400]
- International Science AMP
- Technology Cooperation Program of China [2016YFE0102200]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
- Australian Research Council [DP160104340, DP170100436]
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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.
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