Avoiding short circuits from zinc metal dendrites in anode by backside-plating configuration

Shougo Higashi, Seok Woo Lee, Jang Soo Lee, Kensuke Takechi and Yi Cui ()
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Shougo Higashi: Stanford University
Seok Woo Lee: Stanford University
Jang Soo Lee: Stanford University
Kensuke Takechi: Smart Design of Materials and Process Research-Domain, Toyota Central R&D Laboratories, Inc.
Yi Cui: Stanford University

Nature Communications, 2016, vol. 7, issue 1, 1-6

Abstract: Abstract Portable power sources and grid-scale storage both require batteries combining high energy density and low cost. Zinc metal battery systems are attractive due to the low cost of zinc and its high charge-storage capacity. However, under repeated plating and stripping, zinc metal anodes undergo a well-known problem, zinc dendrite formation, causing internal shorting. Here we show a backside-plating configuration that enables long-term cycling of zinc metal batteries without shorting. We demonstrate 800 stable cycles of nickel–zinc batteries with good power rate (20 mA cm−2, 20 C rate for our anodes). Such a backside-plating method can be applied to not only zinc metal systems but also other metal-based electrodes suffering from internal short circuits.

Date: 2016
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DOI: 10.1038/ncomms11801

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