The lowly battery gets a makeover

Nearly 1.5 billion people across the world lack access to reliable sources of electricity, which has profound effects on global health, environmental degradation and standards of living. And despite the debates over the best way to address this issue, it's abundantly clear that today’s energy production model isn’t up to the task. (A great TED talk outlining the issue is here).

That was the challenge posed at a recent working session for the upcoming G8 Summit. The room was full of people from technology, government, energy production, ecology, nonprofits and academia. All focused on overcoming one of society’s biggest challenges: providing access to energy for all.

When you turn on a light, the power company immediately must generate and transmit enough electricity so the filament glows brightly. When you shut it off, the power company must scale back its production (a non-trivial task when you’re talking about water-powered turbines!) or figure out what to do with the excess power that’s no longer needed.

It’s a vexing problem that could be partially solved if only we had better technology in one key area: batteries.

Ah, the humble battery. It’s one of my favorite things to complain about. As the need for stored power has soared, the fundamentals of battery technology have not kept up with the increasing demands of our portable PCs, tablets, phones and sensors.

In addition to solving “first-world problems,” such as not being able to snap a picture of your lobster thermidor because your phone died, better battery technology could begin to modernize our electrical grid and help leverage the abundant solar, wind, geothermal, wave and biofuel sources that could electrify all of those people who lack access.

If we could capture and store the electricity generated by these variable resources, we could make progress in closing the power gap. Fortunately, for the first time in decades, we are seeing some real commercial advances, not only in storage but also in efficiency. For large scale energy storage, a new company is using inexpensive, earth-abundant materials to develop a “liquid battery.” Unlike traditional batteries that contain solid parts, this battery’s insides literally melt together under the high temperatures generated by the charging and discharging of the batteries. The result is a battery with higher “power density,” i.e. how much energy per kilogram a battery can store. Ambri based its battery on research from MIT and is able to storage massive amounts of energy in 16 square-inch bricks that are stacked together in refrigerator-sized containers.

For more personal uses, such as powering electric cars and tablets, a breakthrough from Northwestern University in Chicago promises some exciting advances through the use of graphene. I had the chance to meet the CEO last week and was immediately impressed by how quickly they took a concept to prototype.

Graphene is essentially a one-atom-thick piece of carbon. And besides being staggeringly beautiful when combined with silicon nanoparticles, SiNode Systems is able to boost how much power a standard lithium-ion battery can store by 10 times, and can make charging 10 times faster.

Image by arsenikh via Shutterstock

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