For those of us who, like my Arts Editor and I, own electric vehicles (EVs), the limited range and recharge times are key limitations on more widespread adoption of EVs. Apparently, though, there may be relief on the horizon, and Witgren on Daily Kos has a handy wrap-up on the news & rumors:
News stories have been hitting sites for a few weeks now that a new battery tech is about to hit the markets for small-scale consumer testing (later this year or early next year) that could be a game-changer in many ways in our battery tech, including for electric vehicles.
The batteries, which are aluminum-ion batteries, incorporate a graphene structure into the battery structure. I don’t pretend to understand all the ins and out of the science, but here are the claims for it — and Graphene Manufacturing Group out of Brisbane is ready to hit the market (on a small scale test market) with its first batteries perhaps as soon as later this year.
- 3x the energy density of lithium-ion batteries. The flip side of this is they are also about 3x heavier, so while you can pack more energy in a smaller package, the weight is going to remain about the same.
- Charging is 20-60x faster than lithium batteries. A “coin” battery, for example, can be fully charged in less than 10 seconds, while a cell phone battery could be fully charged in less than five minutes. An electric vehicle could easily be topped off in minutes as well, making “refueling” stops not so different to stopping for gas now. Worst case, maybe you catch lunch or dinner while your vehicle recharges.
- No overheating issues. GMG’s managing director notes that lithium-ion batteries are prone to overheating when charging or discharging at rapid rates and EV’s require cooling systems to deal with that. So far, these aluminum-ion batteries have shown no sign of such thermal issues, which in turn means space and weight saved on cooling systems that can instead be used for — more batteries and thus, more range!
- The coin batteries have been cycled 2,000 recharge cycles with no loss in performance. If this holds true for larger batteries, another huge leap. Lithium batteries begin to lose performance after a few hundred charge cycles, losing about 20% of their capacity after 1,000 cycles. If these new batteries are experiencing no appreciable performance loss after 2,000 cycles, suddenly we have batteries that could last for many years.
- Aluminum is abundant and the materials in these batteries are recyclable.
If this turns out to be true, it’d be good news for us EV owners and the planet. But it’s the first I’ve heard.
