An Anode-Free Zn–MnO2 Battery
| Autor: | Yun-Pei Zhu, Husam N. Alshareef, Yi Cui |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Range (particle radiation) Materials science Aqueous solution Mechanical Engineering Nucleation Bioengineering 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry Energy storage Anode Chemical engineering Plating General Materials Science 0210 nano-technology |
| Zdroj: | Nano Letters. 21:1446-1453 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.0c04519 |
| Popis: | Aqueous Zn-based batteries are attractive because of the low cost and high theoretical capacity of the Zn metal anode. However, the Zn-based batteries developed so far utilize an excess amount of Zn (i.e., thick Zn metal anode), which decreases the energy density of the whole battery. Herein, we demonstrate an anode-free design (i.e., zero-excess Zn), which is enabled by employing a nanocarbon nucleation layer. Electrochemical studies show that this design allows for uniform Zn electrodeposition with high efficiency and stability over a range of current densities and plating capacities. Using this anode-free configuration, we showcase a Zn-MnO2 battery prototype, showing 68.2% capacity retention after 80 cycles. Our anode-free design opens a new direction for implementing aqueous Zn-based batteries in energy storage systems. |
| Databáze: | OpenAIRE |
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