UCLA Revives Edison-Era Battery Tech with Protein Nanoclusters for Rapid, Durable Energy Storage

UCLA-led research has successfully developed a new nickel-iron battery technology capable of rapid charging and extended durability, potentially suitable for large-scale energy storage applications. This development notably revives a battery chemistry initially explored by Thomas Edison.

The research team, co-led by UCLA, engineered the battery electrodes by growing extremely small clusters of metal using proteins, which were then embedded into an ultrathin carbon-based conductor.

The resulting prototype battery charges in seconds and maintains functionality after more than 12,000 cycles of draining and recharging, demonstrating an operational life equivalent to over 30 years of daily recharges.

Ingenious Protein-Guided Fabrication

The methodology utilized proteins, byproducts of beef production, as templates to guide the growth of nickel clusters for positive electrodes and iron clusters for negative electrodes. These proteins restricted the metal clusters to less than 5 nanometers in size, allowing for a high surface area essential for efficient battery reactions.

The process involved combining these proteins with graphene oxide, a two-dimensional material. This mixture was then subjected to superheating in water, followed by high-temperature baking. This crucial step charred the proteins into carbon and stripped oxygen from the 2D material, effectively embedding the metal clusters within an aerogel structure composed of nearly 99% air.

Simplicity and Cost-Effectiveness

Researchers noted the techniques employed are straightforward and cost-effective, utilizing readily available raw materials. This innovative approach was inspired by natural biological processes, akin to how animals form bones where proteins act as scaffolds for mineral deposition.

Strategic Applications for Energy Storage

While this new iteration of nickel-iron battery technology demonstrates superior charging speed and durability compared to contemporary lithium-ion batteries, it does not currently match their storage capacity. Consequently, its primary application may lie in storing surplus electricity generated by solar farms during the day for grid use at night, or as backup power for data centers. It is not currently envisioned for use in electric vehicles.

Future Outlook

Future research will focus on exploring this nanocluster fabrication technique with other metals and investigating alternative, more abundant natural polymers to replace bovine proteins. This aims for easier scalability in manufacturing, broadening the potential impact of this promising technology.