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A solid solution alloy current collector to stabilize zinc metal anodes.

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A novel copper-indium alloy current collector prevents dendrite growth in aqueous zinc batteries. This breakthrough enables stable zinc anode cycling at high rates for improved battery performance.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Dendrite formation on zinc anodes is a major limitation for the performance and safety of aqueous zinc-metal batteries.
  • Uncontrolled dendrite growth can lead to short circuits and capacity fade, hindering practical applications.

Purpose of the Study:

  • To develop a new current collector that suppresses zinc dendrite growth in aqueous electrolytes.
  • To enhance the stability and cycling performance of zinc anodes at high current densities.

Main Methods:

  • Fabrication of a copper-indium (Cu-In) solid solution alloy as a current collector.
  • Electrochemical characterization of zinc deposition and stripping on the Cu-In current collector.
  • Cycling tests of zinc anodes using the developed current collector in aqueous electrolytes.

Main Results:

  • The Cu-In alloy significantly enhances zinc affinity and reduces the nucleation overpotential for zinc deposition.
  • Dendrite-free zinc deposition was achieved on the Cu-In current collector.
  • The zinc anode (Zn@Cu-In) exhibited stable cycling performance even at high current densities.

Conclusions:

  • The Cu-In solid solution alloy is a promising current collector for enabling dendrite-free zinc deposition in aqueous zinc-metal batteries.
  • This approach offers a viable strategy to improve the cycle life and rate capability of high-performance aqueous zinc batteries.