Volume 90 Issue 34 | p. 49 | Profile
Issue Date: August 20, 2012

Cover Stories: Going Commercial

Donald Sadoway

Materials chemist says his economical battery technology could solve the grid-scale energy storage problem
Department: Business | Collection: Entrepreneurs
News Channels: Materials SCENE
Keywords: entrepreneurship, batteries, electric grid, electrochemistry
Credit: Donna Coveney/MIT
Photo of Donald Sadoway of MIT and battery start-up LMBC.
Credit: Donna Coveney/MIT
Liquid Metal Battery Corp.


Year founded: 2010

Products: Batteries for grid-scale energy storage

Number of employees: 20

Source of start-up funds: Government and private funding (Bill Gates, Total, Khosla Ventures)

Profiled founder’s current role in company: Chief scientist

Advice: Don’t shy away from a field you are not an expert in—the outsider can triumph.

Wind blows when it wants. The sun doesn’t shine all the time. The inherent intermittence of wind and solar power requires electric utilities to find a way to put the generated energy away for a still, cloudy day. Annual global demand for this kind of grid-scale electricity storage will reach $113.5 billion by 2017, according to a March estimate by consulting firm Lux Research.

With that potential market in mind, many firms are scrambling to scale up already-commercialized battery technologies to store electricity for use in the nation’s electrical grid. “But these technologies are fraught with cost, efficiency, reliability, and safety hurdles,” says Donald R. Sadoway, a Massachusetts Institute of Technology materials engineering professor and founder of Cambridge, Mass.-based Liquid Metal Battery Corp. (LMBC). “You need something that can support super‑high current, has extremely long service life, and can do it all at rock-bottom cost.”

A metallurgist by training, Sadoway decided a new kind of battery was needed. Inspired by the pennies-per-pound molten metal electrolysis process used to produce aluminum, he challenged his graduate students and postdocs to develop a battery built entirely of Earth-abundant liquid components.

Sadoway says the technology that his team of students devised could reduce the cost and complexity of building battery installations capable of storing electricity for the grid.

Manufacturing the battery is simple, Sadoway notes. Metal and salt are poured into a battery cell and then heated above their melting points. Once molten, the components’ immiscibility and differing densities naturally drive the battery’s assembly: positive and negative electrodes made of molten metals, separated by a molten salt electrolyte that conducts current between them.

Thanks to these highly conductive liquid layers, the batteries can charge and discharge rapidly, responding to millisecond fluctuations of supply and demand on the power grid.

Sadoway, 62, says the technology’s commercial potential was obvious. But to demonstrate that his film-canister-sized prototype truly could be scaled up, he knew he’d need to look beyond the walls of MIT—and not only because his team had maxed out its building’s electrical capabilities. “A university is not a secure place for the development of intellectual property,” he explains. “Its mission is to disseminate knowledge, not protect it.”

Luckily, Sadoway says, he was in the right place. “MIT’s culture fosters entrepreneurship,” he says. “It’s seen as a positive not a negative for faculty to move technology off campus.”

That’s one of the reasons, Sadoway says, that MIT recently granted him a yearlong teaching sabbatical. He’s using the time to focus on serving as LMBC’s scientific adviser, working alongside his cofounder and former student, David Bradwell, who now serves as the firm’s chief technology officer, as well as Chief Executive Officer Phil Giudice, former commissioner of the Massachusetts Department of Energy Resources.

Sadoway got another helping hand from MIT’s Deshpande Center for Technological Innovation, which provides financial and other support for budding entrepreneurs at the institute. “This was a perishable idea,” he says. “Getting early funding from the Deshpande Center meant we didn’t have to go through the months it takes to get a traditional proposal funded.” The money quickly got him the data he needed to attract major research funding from the Department of Energy’s Advanced Research Projects Agency-Energy (ARPA-E) program and the French energy company Total.

When it came to raising additional seed money for his fledgling company, Sadoway looked for patient investors with deep pockets. “I felt this was an unconventional technology, and I wanted it to be funded in an unconventional way,” he says. He convinced Total to put up additional funds for the company. Microsoft founder Bill Gates, who had expressed interest in Sadoway’s liquid battery idea during a visit to MIT several years prior, also agreed to kick in funds.

This May, Khosla Ventures, a venture capital firm established by Sun Microsystems founder Vinod Khosla, joined Gates and Total in backing LMBC. Together they invested an additional $15 million in the business.

Sadoway credits his success to his team’s outsider status—and its unwavering eye on cost. “My students and I were not steeped in the battery industry,” and brought fresh, untried ideas to the table, he says. “If you think by commercializing your idea you can address an unmet need—at the price point of the existing market—then by all means, pursue your dreams.”

Chemical & Engineering News
ISSN 0009-2347
Copyright © American Chemical Society
George (Wed Oct 24 10:14:06 EDT 2012)
I watched Dr. Sadoway's interview on Stephen Colbert and was fascinated. I wish he and his stellar team good fortune as they take steps to dramatically improve the lives of us all. I remember what happened with the NiMH patent, and have high hopes this will not be allowed to fall into the wrong hands again.
Alan Enzler (Fri Oct 26 18:04:44 EDT 2012)
WOW This is it, the very product that I've been looking to represent my entire sales career.I began in the 80's with solar hot water heating systems (using PV panels to run circulation pumps and controllers) then onto residential water treatment for over 25 years. I've seen some great innovations but this is off-the-charts in importance. I'd love to be part of the effort to market this on any level. Since Bose and Tom Shultz did most of their phenonmenal work at (and around) MIT, nothing has ever jumped out at me like the liquid metal battery. KUDOS and much luck from a facinated consumer.
Jud Kastner (Mon Nov 05 16:07:17 EST 2012)
Alternatives to energy vital for America sustenance and growth. Though I do not have an engineering degree, or been involved in this field - I would like to see this happen in a marketing way. To show this to additional investors is vital to see that funding does not end when progress is being made. Now that I am retired, I would very much be interested in being a sales advocate for investment in the Michigan/Ohio region and promote this idea to people looking for investment opportunities in a growing and visionary company. America needs to compete more in this area as an alternative to energy reserve, so sorely needed in the "Rust Belt" region. I like the "advice" comment - "Don't shy away from a field you are not an expert in - the outsider can triumph" - I can envision myself being successful in advocating for these products.
Seamus Garvey (Sun Jun 02 11:25:17 EDT 2013)
'Great story. Congrats. Would love to hear some numbers though. How many kg of Antimony and Magnesium do we need per kWh of capacity and how many kWh of energy did it take to extract those metals? If the answer is <100, you guys are definitely onto a winner. If the answer is >10,000, you get beaten by lots of other tech. for cost per unit energy capacity. 1000 is "mid-stream".
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