Issue 4, 2019

Achieving a high-performance Prussian blue analogue cathode with an ultra-stable redox reaction for ammonium ion storage

Abstract

Aqueous rechargeable batteries with advantages of safety, low cost, and environmental kindness have displayed high feasibility of practical applications for large-scale energy storage. Developing high-performance electrode materials is a necessary gateway to commercially available batteries. Here, we demonstrate the controlled synthesis of sodium iron hexacyanoferrates, NaFeIIIFeII(CN)6 (Na-FeHCFs). Ball-cutting Na-FeHCF nanocubes are first synthesized and used as a cathode material for aqueous ammonium-ion batteries. Due to fast charge transfer and diffusion, the ball-cutting Na-FeHCF nanocubes exhibit a high discharge capacity of 62 mA h g−1 at 0.25 A g−1 and 77.4% capacity retention at 2 A g−1. Such excellent capacity and rate performance are superior to those of other Na-FeHCFs and the reported ammonium-ion intercalation cathodes. Furthermore, they present unparalleled cycling stability with no capacity loss over 50 000 cycles, thanks to the highly stable redox reaction of the high-spin nitrogen-coordinated FeII/FeIII (FeH) couple. This work supplies a new view to design high-performance cathode materials for ammonium ion storage.

Graphical abstract: Achieving a high-performance Prussian blue analogue cathode with an ultra-stable redox reaction for ammonium ion storage

Supplementary files

Article information

Article type
Communication
Submitted
13 dec 2018
Accepted
01 mrt 2019
First published
04 mrt 2019

Nanoscale Horiz., 2019,4, 991-998

Achieving a high-performance Prussian blue analogue cathode with an ultra-stable redox reaction for ammonium ion storage

C. Li, W. Yan, S. Liang, P. Wang, J. Wang, L. Fu, Y. Zhu, Y. Chen, Y. Wu and W. Huang, Nanoscale Horiz., 2019, 4, 991 DOI: 10.1039/C8NH00484F

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