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XG Sciences launches graphene-stabilized silicon anode materials for Li-ion batteries

XG Sciences, Inc. (XGS), a manufacturer of graphene platelets, has launched silicon anode materials for Li-ion batteries, with immediate availability. The new anode material is produced through proprietary manufacturing processes and uses the company’s xGnP graphene nanoplatelets to stabilize silicon particles in a nano-engineered composite structure.

The material displays significantly improved charge storage capacity—around 4x that of conventional anode materials—with good cycle life and high efficiencies. Rob Privette, VP Energy Markets for the company, said that the exact performance of the new anode materials will depend on the specific battery formulations used by cell manufacturers. XGS has demonstrated capacity of 1500 mAh/g with low irreversible capacity loss and stable cycling performance.

We are pleased to announce the immediate availability of this new high-capacity anode product. Our new Silicon-graphene anode material, when used in combination with our existing xGnP graphene products as conductive additives, provides significantly higher energy storage than conventional battery materials. We are working with battery makers to translate this exciting new material into batteries with longer run-time, faster charging and smaller sizes than today’s batteries.

One of the key focus areas of our research team was to produce a material that can be inserted relatively easily into the complex battery production processes that are used today. Our goal was to minimize the need for major changes to electrode coating processes or assembly techniques.

We expect initial adoption in the highly-competitive consumer electronics markets that are dominated by Asian battery makers, but we also have research and development partners that are focused on hybrid and electric vehicles, grid storage, military, and specialty industrial applications. Over time, we anticipate formulating custom nano-engineered anode materials with specific properties for each of these major markets.

—Rob Privette

Two of the company’s strategic partners, POSCO and Hanwha Chemical, already manufacture electrode materials for lithium-ion batteries, noted Mike Knox, XGS CEO. One licensee, Cabot Corporation, recently introduced their first battery additive based on XGS technology. XGS is also working with development partners such as Georgia Tech, several large battery manufacturers, and several of the US National Laboratories, Knox said.

Last fall, the US Department of Energy (DOE) has awarded XGS a contract to develop low-cost, high-energy Si/graphene anodes for Li-ion batteries for use in extended range electric vehicle applications. XG Sciences is leading a team that includes battery maker LG Chem Power, Inc. and the Georgia Institute of Technology. (Earlier post.)



Wonder how long it will take the 100+ existing battery manufacturers to use this superior electrode material to mass produce greatly improved (1000+ Wh/Kg) batteries?

This could be what future extended range BEVs have been waiting for?


I expect you to be jumping up and down and celebrating now! Here is someone SHIPPING one of those breakthrough components, so please tell me you'll say something positive on this one.



it will take time before a big manufacturer of batteries integrate a Si anode in mass produced battery. Si anode are notoriously unreliable, so it will require more than an announcement like this one to convince potential customers.



"Why don't you knock it off with them negative waves? Why don't you dig how beautiful it is out here? Why don't you say something righteous and hopeful for a change?"


Regardless of what naysayers are posting, improved lower cost EV batteries will be mass produced before 2020 and many million lower cost BEVs will be built every year from 2017/2018 and onward.

ICEVs are on their 'progressive' way out.

HEVs and PHEVs many survive a few more years but they will also be phased out.

Pushing CAFE to 75+ mpg may help?

The world will soon recognize Pres. Obama (and his team) efforts to accelerate development and mass production of lower cost EV batteries and electrified vehicles.


I think Kelly fainted from low blood sugar induced by a lack of doom&gloom :)


Not on the shelves yet but much closer to that point than the research. My prediction inspired by the Lux forecast reported here in the last month will be that the anodes will appear first in consumer electronics. For example people will pay for greater energy in smart phone cells without losing the slimness of their phone. Initially after market replacement cells until the technology becomes reliable enough for big manufacturers to put their name to it.

Car manufacturers/customers aren't going to want to have major investments in risky technologies. Look how long it took for Toyota to start using li-ion: they are on the conservative end of the spectrum, but Boeing may be wishing that they were just as cautious.


Envia Systems and CalBattery already have Si-carbon and Si-graphene anodes out there. 2020 is a ridiculous goal considering their recent developments.

the anodes will appear first in consumer electronics. For example people will pay for greater energy in smart phone cells without losing the slimness of their phone.
That's always where these things start.  The environmental requirements for consumer equipment are also much more relaxed than automotive.

Power users are willing to pay $1000/kWh and more to run their electronics; a laptop battery that lasts for an overseas flight is worth its weight in gold to some people.  Traction batteries have much less tolerance for high prices, so those will be on the tail end of the adoption curve.

It's coming.  Patience.

As Aha

isn't cathode storage capacity limiting? while increasing anode capacity helps too, but too way smaller degree than cathode


@As Aha,
As you say, the cathode has historically been the limiting electrode, but surprisingly, many of the recent announcement breakthroughs have been on the cathode side.

There are advances coming on both sides and electrolytes too. Eventually they will come together in cells.

As EP said: Patience Grasshopper. Ok, I added the Grasshopper part.


@As Aha
CalBattery and Envia Systems both are licensed to use the Argonne Labs developed cathode in their batteries. That cathode has 250-300 mAh/g much better than most cathodes on the market. Their batteries give 400-525 Wh/kg. Rice University announced two weeks ago that they are using Vanadium and graphene ribbons in their cathode to get 425 mAh/g, with long life and high current at the same time. A battery with their cathode and si-graphene anodes may get 700 Wh/kg.


@DaveD & Herm, it seems someone finally listened to me and at least put a battery(~<4X?) "breakthrough" component on the market.

I even read that the S. Korean built GM EV Spark is:

presently being produced

will have 100 or 200 mile charge range

will be ~$25,000 USD

Meanwhile, mark your calendars and we will see how long a "..material that can be inserted relatively easily into the complex battery production processes that are used today." takes to drop-in a marketed battery and meet stated specifications.

They say the squeaky wheel gets the grease...


The EV Spark battery doesn't have high capacity. It uses a A123 iron nanophosphate battery, probably ANR26650. It only has about 110 Wh/kg, but it charges and discharges very fast, so it will work with regenerative braking and quick charge stations. It has a long cycle life too. if its range is over 100 miles, it's because it's only the size of a golf cart.


close.. "GM has vaguely mentioned plans for two other new EVs, one with a 100-mile range, another with 200."

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