By Tsvetana Paraskova
The rise of electric vehicles and the quest to find solutions to energy storage for the renewables industry have created a breeding ground for tech experts to develop battery technologies.
Last week, Sun Microsystems co-founder Bill Joy and the company he currently backs, Ionic Materials, unveiled a solid-state alkaline battery design that they claim would be cheaper and safer than the lithium-ion battery.
“What people didn’t really realize is that alkaline batteries could be made rechargeable,” Joy told Bloomberg in a phone interview last week. “I think people had given up,” Joy noted.
The three main possible applications of the new alkaline battery technology would be consumer electronics, electric cars, and energy storage for the power grid, according to the developers.
However, also according to Joy, the company just has the material, and the technology is not ready to go commercial right away. The rechargeable alkaline battery technology could be ready for commercial use within five years, Joy told Bloomberg, adding that Ionic Materials didn’t have a factory to manufacture the tech.
The prototype designs have demonstrated up to 400 recharge cycles for the alkaline battery, and Ionic Materials believes that the number of recharge cycles could be tripled, the New York Times reports.
On the downside, apart from uncertain commercial future, is the fact that Ionic’s first alkaline batteries would be heavier than the lithium-ion batteries today.
Alkaline batteries mostly use zinc and manganese.
Ionic Materials has made progress toward developing a design for an alkaline battery that would use cheaper aluminum instead of zinc, Joy told the NYT. Aluminum-based alkaline designs could potentially weigh less than lithium-ion designs and could be cheaper than the alkaline designs today, according to the NYT.
“They use an unusual electrolyte to come up with a battery that uses common cheap materials and is benign,” Amory Lovins, the founder of non-profit sustainable energy research group Rocky Mountain Institute (RMI) — at whose summit Ionic unveiled its technology — told the NYT, referring to the company.
However, Lovins is cautious about forecasts whether the alkaline design would be such as to hit the mass market.
“Batteries are very difficult and I want to see what they have and what can be measured and proven and whether it will get to market,” Lovins told the NYT.
Meanwhile, lithium-ion battery prices have dropped a lot over the past few years. According to Bloomberg New Energy Finance (BNEF), the lithium-ion battery pack prices dropped from US$1,000/kWh in 2010 to US$273/ kWh last year.
Large demand for lithium-ion batteries is predicted ahead, with BNEF expecting EVs sales to accelerate and make up 54 percent of new car sales by 2040. One of the main drivers of EV growth, according to BNEF, will be tumbling battery prices.
“The real take-off for EVs will happen in the second half of the 2020s due to plunging lithium-ion battery prices, which are set to fall by more than 70% by 2030,” according to BNEF’s Electric Vehicle Outlook 2017.
EVs adoption and the need to find energy storage solutions will charge the battery race in the years and decades to come. The key question here is, will the battery design breakthroughs turn from lab tests into viable mass market energy options?