Lithium-ion batteries that power EVs and laptops today have to use organic solvents like ethylene carbonate to shuttle charge around (we’ll get into the details on why later). But chemistries that make it possible to rely on water instead could mean even safer batteries.
Water and electronics don't usually mix, but as it turns out, batteries could benefit from some H 2 O. By replacing the hazardous chemical electrolytes used in commercial batteries with water, scientists have developed a recyclable 'water battery' – and solved key issues with the emerging technology, which could be a safer and greener alternative.
'Water batteries' are formally known as aqueous metal-ion batteries. These devices use metals such as magnesium or zinc, which are cheaper to assemble and less toxic than the materials currently used in other kinds of batteries.
Researchers at RMIT University, along with global industry collaborators, have developed recyclable “water batteries” that address safety concerns associated with traditional lithium-ion batteries. The team focuses on aqueous metal-ion batteries, utilising water instead of organic electrolytes to prevent the risk of fire or explosions.
And I’ve seen a growing number of alternative battery makers talk about using an interesting ingredient in their electrolyte: water. Lithium-ion batteries that power EVs and laptops today have to use organic solvents like ethylene carbonate to shuttle charge around (we’ll get into the details on why later).
And with lower power and lower voltages needed, companies can use water with salts mixed in as an electrolyte. That could help save on costs, make the batteries easier to manufacture, and also help with safety. You’d probably have a hard time setting water-based batteries on fire, even if you tried.