Zn-induced formation of polymetallic carbonate hydroxide cathodes with high mass loading for high performance aqueous alkaline Zn-based batteries.

J Colloid Interface Sci

Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Photoelectric Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, PR China; School of Chemical Engineering and Technology, Sun Yat-sen University, 519082 Zhuhai, PR China. Electronic address:

Published: March 2024

AI Article Synopsis

  • Developing high mass loading cathodes for alkaline aqueous rechargeable Zn-based batteries (AAZBs) is both valuable and challenging.
  • A new zinc-induced strategy was used to create a heterostructure nanosheet array of Zn-Ni-Co carbonate hydroxides on Ni foam, achieving a mass loading of 9.2 mg/cm².
  • This innovative cathode design enhances ion and electron transfer, leading to impressive performance metrics, including an areal capacity of 2.1 mAh/cm² and excellent cycling stability, retaining 0.42 mAh/cm² after 5,000 cycles.

Article Abstract

Developing high mass loading cathodes with high capacity and durable life cycles is greatly worthwhile and challenging for alkaline aqueous rechargeable Zn-based batteries (AAZBs). Herein, we demonstrate an efficient zinc-induced strategy to rationally develop Zn-Ni-Co carbonate hydroxides/hydroxides heterostructure nanosheet array with an extremely high mass loading of 9.2 mg cm on Ni foam (ZNC/NF) as such a superior cathode for AAZBs. It is discovered that Ni-Co hydroxide nanowires can be transformed into Zn-Ni-Co carbonate hydroxides/hydroxides heterostructure nanosheet with rich defect structures after the introduction of Zn during the synthetic process. The formed heterostructures and rich defect structures can enhance ion and electron transfer efficiency, thus ensuring the excellent electrochemical performance under high loading condition. Consequently, the ZNC/NF//Zn battery shows an outstanding areal capacity of 2.1 mAh cm at 5 mA cm, with an ultrahigh energy density of 3.6 mWh cm. Moreover, the battery can still retain a high capacity of 0.42 mAh cm after 5000 cycles at 50 mA cm, suggesting strong long-term cycling stability. This research enables pave the way for the rational design and manufacture of advanced electrode materials with large mass loadings.

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Source
http://dx.doi.org/10.1016/j.jcis.2023.12.035DOI Listing

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