Homogenizing Zn Deposition in Hierarchical Nanoporous Cu for a High‐Current, High Areal‐Capacity Zn Flow Battery
Source abstract
Abstract
Abstract A Zn anode can offset the low energy density of a flow battery for a balanced approach toward electricity storage. Yet, when targeting inexpensive, long‐duration storage, the battery demands a thick Zn deposit in a porous framework, whose heterogeneity triggers frequent dendrite formation and jeopardizes the stability of the battery. Here, Cu foam is transferred into a hierarchical nanoporous electrode to homogenize the deposition. It begins with alloying the foam with Zn to form Cu5Zn8, whose depth is controlled to retain the large pores for a hydraulic permeability ≈10−11 m2. Dealloying follows to create nanoscale pores and abundant fine pits below 10 nm, where Zn can nucleate preferentially due to the Gibbs–Thomson effect, as supported by a density functional theory simulation. Morphological evolution monitored by in situ microscopy confirms uniform Zn deposition. The electrode delivers 200 h of stable cycles in a Zn–I2 flow battery at 60 mAh cm−2 and 60 mA cm−2, performance that meets practical demands.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced battery technologies research · Electrocatalysts for Energy Conversion · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China
Interdisciplinary Programs Office The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China
Department of Materials Science and Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials Southern University of Science and Technology Shenzhen Guangdong 518055 P. R. China
Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China
Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Hong Kong P. R. China
School of Mechanical and Manufacturing Engineering University of New South Wales Sydney NSW 2052 Australia
Department of Mechanical Engineering Khalifa University Abu Dhabi 127788 UAE
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