US-based battery and graphene technology startup Nanotech Energy just closed a $27.5 million funding round at a post-money valuation of $227.5 million, according to the company. The investors were not disclosed. The company has raised more than $30 million since its 2014 founding.

Jack Kavanaugh, CEO of the company, spoke with pv magazine. His startup claims to be the worlds top supplier of graphene and plans to release a non-flammable, environmentally friendly lithium battery that can charge 18 times faster than anything that is currently available on the market within the next year.

(This list of leading graphene suppliers does not include Nanotech Energy.)

Kavanaugh said, We are confident that we have a one-of-a-kind, industry-changing product that will impact the technologies and bottom lines of multiple end-user markets.

Headquartered in Los Angeles, California, Nanotech Energy is co-founded by Kavanaugh and UCLA scientists Richard Kaner and Maher El-Kady.

Although investors in this round were not disclosed, Kavanaugh, along with fellow-board members Mahi De Silva and Robert Snukal are part of Multiverse Investment Fund, a minority investor in the battery startup, according to Pitchbook.

Graphene!

Graphene can improve the surface area and electronic conductivity of the lithium-ion battery anode and cathode. According to the company, these nanostructured electrodes enable a new generation of lithium-ion batteries with excellent power density, exceptionally high energy density and long cycling life.

The startup uses a solution processing method that allows graphene to be coated on any substrate along with a laser process step that forms a graphene foam. The company had originally applied its graphene technology to making better supercapacitors but now focuses on its super battery.

Nanotech Energy is commercially shipping graphene inks and the CEO stresses that it is producing real graphene, not graphite. Science Mag points out that much of what is sold as graphene is often small pieces of bulk graphite despite its $300 per gram price. Graphite is used as structural support in tennis racquets and bicycles but its not the one-atom-thick sheet of monolayer graphene needed to make a better battery.

The CEO said that fabricating its own graphene allows the startup to be vertically integrated. He adds that the firm can produce kilos per day compared to the grams coming from other vendors.

Specs and claims

The CEO said that the companys technology is being applied to various lithium formulations, as well as a non-lithium, environmentally friendly, water-based electrolyte.

The company claims:

The CEO did not provide figures on Nanotech Energys power density or energy density.

Market entry and business plan

Although Nanotech Energys $27.5 million is a decent pile of money, its about $1 billion short of the investment necessary for a large battery factory.

And that leaves the company to decide if it wants to be a battery builder, or at a fraction of the capital raise an electrode supplier to battery builders.

Having lived through weekly battery breakthrough claims and after covering battery startups such as A123, Envia, Aquion, Imergy, and Alevo this reporter is inclined to keep Thomas Edisons words regarding battery entrepreneurs in mind.

Nevertheless, if Nanotech Energy can realize its claims of cycle life, charge time and energy densities it will be a profound breakthrough.

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Investors bet $27.5 million that Nanotech Energy's graphene battery breakthrough is the real thing - pv magazine International