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Novel battery anode offer four times more capacity

16 Apr 2013

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A new generation of anode materials for lithium-ion batteries (LIB) has been introduced by XG Sciences Inc. (XGS). The company claims that these anodes use xGnP graphene nanoplatelets to stabilise silicon particles in nano-engineered composite structure and offer four times the capacity of conventional materials.

"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," said Rob Privette, VP Energy Markets. "This is great news for applications like smartphones, tablet computers, stationary power and vehicle electrification that use rechargeable lithium-ion batteries. 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," he added.

The exact performance of the new anode materials will depend on the specific battery formulations used by the cell manufacturer, noting that XGS has demonstrated capacity of 1500mAh/g with low irreversible capacity loss and stable cycling performance in life tests. "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 minimise the need for major changes to electrode coating processes or assembly techniques," he added.

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

 XG Sciences anode materials

xGnP Si-graphene nanocomposite

Global partnerships
Mike Knox, the XGS CEO, said that "As the world's largest producer of graphene nanoplatelets, we have the capacity and production expertise to produce battery materials efficiently and effectively, and we have global production partners. For example, two of our strategic partners, POSCO and Hanwha Chemical, already manufacture electrode materials for lithium-ion batteries. One of our licensees, Cabot Corporation, recently introduced their first battery additive based on our technology. We are also proud to work with such diverse development partners such as Georgia Tech, several large battery manufacturers, and several of the US National Laboratories."

The immediate availability of this high-capacity anode product has also been announced by XGS.

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