Highly Reversible Plating/Stripping of Porous Zinc Anodes for Multivalent Zinc Batteries

a) Post-mortem SEM and b) X-ray tomography of 3D Zn anode after 100 cycles. c) Symmetric cell cycling shows lower overpotential for 3D Zn (green) vs. Zn foil (black) for 100 cycles.

Scientific Achievement

Highly reversible Zn plating/stripping achieved with electrodes prepared by electrodepositing Zn onto porous 3D Cu foam.

Significance and Impact

The redesign of conventional metal foils into a 3D porous form factor leads to dramatic improvements in cycling performance. These results demonstrate an efficient method for preparing such porous electrodes for multivalent Zn batteries.

Research Details

  • Electrodeposition of a conformal Zn coating onto porous 3D Cu foam.
  • Cycling in symmetric cells showed stable cycling for 100 cycles (35 h of plating/stripping)
  • X-ray tomography and scanning electron microscopy showed no evidence of dramatic morphology changes after cycling
  • 3D Zn anode supported high capacities and high-rate capability when paired with a V2O5 cathode

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DOI: 10.1149/1945-7111/abc206

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