Inventors

Nagore Ortiz Vitoriano (CIC energiGUNE), Estibaliz García Gaitán (CIC energiGUNE), Maria Carmen Morant Miñana (CIC energiGUNE)

Abstract

The high specific energy density of Zn–air batteries and their inherent safety and low cost make them one of the most promising next-generation batteries. However, different issues limit the industrial applicability of these type of batteries. As an example, the performance of the battery is directly affected by the ionic conductivity of the electrolyte and its interfacial properties with respect to the anode and the cathode. It is therefore of outmost importance to develop new electrolyte materials that help minimizing these issues.

Researchers at CIC energiGUNE have developed a gel electrolyte based on a polysaccharide network that possesses excellent mechanical and transport (i.e., conductivity) properties which are capable of avoiding penetrations and leakages of the electrolyte through the porous air cathode, as well as suppressing dendrite formation, hydrogen evolution, shape change, and surface passivation; ultimately enabling levels of zinc utilization approaching 100%.

Added value

• Electrolyte with excellent mechanical and transport (i.e., conductivity) properties


• Suppression of dendrite formation


• High levels of zinc utilization

Application of the technology

• Metal-air batteries