An artificial bridge between the anode and the anolyte enabled by an organic ligand for sustainable zinc-based flow batteries

Literature Information

Publication Date 2023-12-05
DOI 10.1039/D3EE02693K
Impact Factor 38.532
Authors

Chenyi Liao, Pengcheng Xu, Chenguang Yuan, Fengtao Fan, Guohui Li, Zhizhang Yuan, Xianfeng Li


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Abstract

Zinc-based flow batteries are receiving huge attention due to their attractive features of high energy density and low cost. Nevertheless, their reliability is normally limited by dendritic zinc in the anode, which is influenced by the enormous difference in the transfer rate of zinc species in bulk solution and their electrochemical reaction rate at the anode. Here we engineer an artificial bridge between the anode and the anolyte enabled by organic ligands to realize fast transfer of zinc species from bulk solution to the interfacial region of the anode for zinc-based flow batteries. The ligands serve as the bridge in constructing a directional three-dimensional transport channel for zinc species first by coordination with zinc species and then adsorption on the surface of the anode, which enables a highly uniform and dense zinc morphology. Remarkably, an alkaline zinc–iron flow battery cell stacked with the organic ligand in the anolyte achieves stable cycling for ∼700 hours at 40 mA cm−2 with an average coulombic efficiency of 98.04% and an energy efficiency of 88.53%, respectively. This work presents a promising solution to address the issue of zinc dendrites and offers a path for developing highly reliable electrolytes for low-cost and sustainable zinc-based flow batteries.

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Source Journal

Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
Self-citation Rate: 3.4%
Articles per Year: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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