Vastly improved Li-Ion batteries for electric vehicles towards reduced weight, increased range and faster charging

The Li-Ion battery technology has seen a significant advance in the last decade. For example a three-fold increase in energy density along with a 6-fold reduction in price has resulted in a significant uptake of electric vehicles (EVs) in the transportation sector. It is therefore a forgone conclusion that increasing market share of EVs in the transportation sector is strongly dependent on advances in batteries’ energy density. Despite their commercial success, Li-Ion batteries still need to be greatly improved to meet energy and power demands in the various commercial and military sectors. Therefore, improved performance in terms of cycle life, energy density and fast charging capabilities, will have a significant impact on making EVs more ubiquitous on the road, and on mobility in general. An area where improvement is critically needed concerns charge retention for long periods of time and rate capability of the battery – its ability to deliver large capacity when discharged at high C rates. It is now well established that these limitations in the rate capabilities are caused by slow solid-state diffusion of Li ion within the electrode materials. As a result, there is tremendous interest in the development of nanostructured electrodes as an alternative to the polycrystalline microparticulate graphite anode which has been one of the major limiting factors in further improvement of current technology. We have developed a nanostructured anode material that is thus far the best performing anode material with an energy density that is several factors better than that of graphite, which will potentially more than double the energy density of battery packs used in EVs. We intend to develop this material further and implement its use in batteries for EVs (https://www.sbir.gov/awards/127416).


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