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A123 partners with SolidEnergy to bring 800 Wh/kg solid polymer lithium batteries to market

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A123 Venture Technologies, a Massachusetts technology incubator, announced today its collaboration with MIT startup SolidEnergy. This strategic partnership leverages SolidEnergy’s transformative solid electrolyte technology enabling the safe and practical use of lithium metal anodes for high energy density batteries in a wide range of applications. It is also the first publicly announced agreement under A123’s expanded R and D model introduced earlier this year.

SolidEnergy technology can potentially deliver energy densities of up to 800 Wh/kg—twice the energy density of state-of-the-art batteries and four times the energy density compared to conventional lithium-ion batteries.

The SolidEnergy prototype battery combines a Li(NiMnCo)O2 (NMC) cathode; the novel electrolyte; and a solid-polymer-coated lithium metal anode. The electrolyte combines ionic liquid and liquid polymer to provide both the safety and wide


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