NanoSafe ™ nano-titanate battery
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1 January 2007
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“The Altairnano NanoSafe™ Battery Altairnano solved this problem using an innovative approach to rechargeable battery chemistry by replacing graphite with a patented nano-titanate material as the negative electrode in its NanoSafe batteries. This nano-titanate material is a "zero strain" material in terms of lithium ion internal deposition and release. The lithium ions have the same size as the sites they occupy in the nano-titanate particles. As a result the nano-titanate particles do not have to expand or shrink when the ions are entering or leaving the nano-titanate particles, therefore resulting in no (zero) strain to the nano-titanate material. This property results in a battery that can be charged and discharged significantly more often than conventional rechargeable batteries because of the absence of particle fatigue that plagues materials such as graphite. Conventional lithium batteries can be typically charged about 750 times before they are no longer useful, whereas, in laboratory testing, the Altairnano NanoSafe battery cells have now achieved over 9,000 charge and discharge cycles at charge and discharge rates up to 40 times greater than are typical of common batteries, and they still retain up to 85% charge capacity. As an example of the application significance of this feature if a conventional lithium battery is charged and discharged every day then it would typically last for about 2 years. Under the same scenario, an Altairnano battery would be projected to last 25 years. This durability is critical in a high value application like electric vehicles. “
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