Ultrafast Zinc-Ion Diffusion Ability Observed in 6.0-Nanometer Spinel Nanodots

ACS Nano
Le JiangLinfeng Hu

Abstract

Rechargeable aqueous Zn-ion batteries (ZIBs) have recently attracted much attention due to their low cost and superior safety. Unfortunately, their low capacity and poor cycle life still hinder their practical application. Here, we have developed a general synthesis strategy for ultrasmall spinel oxide nanodots (Mn3O4, CoMn2O4, MnCo2O4.5, Co3O4, and ZnMn2O4) with abundant oxygen vacancies and highly active surface. Among them, 6.0-nanometer-sized Mn3O4 nanodots deliver the best Zn-ion storage ability with a high reversible capacity of 386.7 mA h g-1 at 0.1 A g-1, excellent rate performance, and a long-term stability of 500 cycles at 0.5 A g-1. Taking advantage of the highly activated surficial atoms, shortened transfer pathway, and introduction of numerous oxygen vacancies, an ultrahigh Zn2+ diffusion coefficient of 2.4 × 10-10 cm2 s-1 has been detected during the discharge process. This value is more than 2 orders of magnitude higher than that of other spinel oxide nanostructures in previous reports and also the highest one in all of the as-reported ZIB cathode materials to date. Our finding offers promising opportunities for the development of ZIB cathode materials with high energy density, long-term cycling stability, excell...Continue Reading

References

May 4, 2005·Nature Materials·Antonino Salvatore AricòWalter van Schalkwijk
Feb 17, 2015·Journal of the American Chemical Society·Xingke CaiTakayoshi Sasaki
Sep 15, 2016·Journal of the American Chemical Society·Ning ZhangJun Chen
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Mar 8, 2017·Nature Nanotechnology·Dingchang LinYi Cui
Dec 16, 2017·Science·Changbao ZhuJoachim Maier
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May 9, 2019·ACS Applied Materials & Interfaces·Yang LiuGuohui Yuan
Jun 15, 2019·Advanced Materials·Kexin Chen, Liang Li

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Citations

Jan 16, 2021·ChemSusChem·Wen ShiJunmin Xue
Apr 3, 2021·Advanced Materials·Haobo DongIvan P Parkin
May 18, 2021·Advanced Materials·Yuhang DaiLiqiang Mai
Apr 25, 2020·ACS Applied Materials & Interfaces·Jindi WangYongming Sun

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