Improving the cycle life of a high-rate, high-potential aqueous dual-ion battery using hyper-dendritic zinc and copper hexacyanoferrate

Tanya Gupta, Andrew Kim, Satyajit Phadke, Shaurjo Biswas, Thao Luong, Benjamin J. Hertzberg, Mylad Chamoun, Kenneth Evans-Lutterodt, Daniel Artemus Steingart

Research output: Contribution to journalArticle

95 Scopus citations

Abstract

Prussian Blue Analogue (PBA)-Zn aqueous batteries are attractive because of the high potential of PBA against Zn (∼1.7 V), relative safety of the system, and high rate capability. But, despite the long cycle life of PBA half-cells, full PBA-Zn battery systems studied thus far have typically reported only up to 100 cycles and suffer significant capacity fade beyond that. In this work we demonstrate that the loss in capacity retention and cycle life is a combined effect of Zn2+ ion poisoning at the PBA cathode, as well as dendrite formation in the zinc anode. We address both these issues via the use of a dual ion (Na+ as the primary charge carrier) electrolyte and hyper-dendritic Zinc (HD Zn) as the anode. The copper hexacyanoferrate (CuHcf) vs. HD Zn system with Na+ ion electrolyte demonstrated herein exhibits 90% (83%) capacity retention after 300 (500) cycles at a 5C rate and a 3% reduction in usable capacity from 1C to 5C. Detailed characterization is done using in situ synchrotron energy-dispersive XRD (EDXRD), conventional XRD, XPS, SEM, TEM, and electrochemical techniques.

Original languageEnglish (US)
Pages (from-to)22-29
Number of pages8
JournalJournal of Power Sources
Volume305
DOIs
StatePublished - Feb 15 2016

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Keywords

  • Aqueous dual ion battery
  • High capacity retention
  • Hyper-dendritic zinc
  • In situ EDXRD
  • Long battery cycle life
  • Prussian blue analogue

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