LSU builds a metal-free, water-based battery using ammonium ions
Feb 24th 2026
Researchers demonstrated a fully metal-free battery with organic electrodes and an aqueous electrolyte that ran small devices and showed stable cycling in lab tests.
- LSU researchers designed a fully metal-free battery using organic electrodes and a water-based electrolyte.
- The cell uses ammonium ions (NH4+) as the charge carrier instead of metal ions like lithium.
- The anode material is the organic dye PTCDA and the cathode is a carbon-based polymer.
- Lab tests showed stable charge-discharge cycling and the battery powered a digital thermometer and LED lights.
- The design removes flammable electrolytes and scarce toxic metals, reducing fire risk and environmental impacts.
- Team says the lightweight, potentially flexible chemistry could suit wearables, medical devices, and other safer energy storage uses.