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Related Experiment Video

Updated: Dec 22, 2025

Fabrication of VB2/Air Cells for Electrochemical Testing
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Zinc-Air Battery-Based Desalination Device.

Jinhong Dai1, Ni Lar Win Pyae1, Fuming Chen1

  • 1Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials, Guangdong Provincial Engineering Technology Research Center for Wastewater Management and Treatment, School of Environment, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, P.R. China.

ACS Applied Materials & Interfaces
|May 6, 2020
PubMed
Summary

A new zinc-air battery desalination device (ZABD) simultaneously purifies brackish water and generates energy. This sustainable technology offers a dual solution for water scarcity and energy needs.

Keywords:
desalinationdesalination batterydrinking wateremergency power supplyzinc-air battery

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Environmental Engineering

Background:

  • Renewable energy storage and water desalination are crucial for sustainability.
  • Existing desalination batteries require separate operational modes and external energy.

Purpose of the Study:

  • To develop a novel device for simultaneous brackish water desalination and energy generation.
  • To demonstrate the efficiency and reversibility of the proposed system.

Main Methods:

  • A zinc-air battery-based desalination device (ZABD) was designed using zinc anode, air cathode, and ion-exchange membranes.
  • The device utilizes flowing streams of ZnCl2 anolyte, brackish water, and NaCl catholyte.
  • Performance was evaluated based on desalination rate, energy output, and cyclic stability.

Main Results:

  • The ZABD successfully desalted brackish water from 3000 ppm to 120.1 ppm in a single step.
  • The device provided an energy output of up to 80.1 kJ mol⁻¹ at a current density of 0.25 mA cm⁻².
  • Over 20 cycles, the ZABD showed no significant performance degradation, indicating good reversibility.

Conclusions:

  • The ZABD system offers a promising solution for simultaneous water desalination and energy supply.
  • The device's performance is adjustable and suitable for various applications, including powering devices in remote areas.