An Anode-Free Zn–MnO2 Battery

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 dem...

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Bibliographic Details
Published inNano letters Vol. 21; no. 3; pp. 1446 - 1453
Main Authors Zhu, Yunpei, Cui, Yi, Alshareef, Husam N
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 10.02.2021
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Summary: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.
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King Abdullah Univ. of Science and Technology (KAUST)
AC02-76SF00515; OSR-CRG2018-3735
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.0c04519