Improvements in battery technology are frequently overlooked by consumers, but really are a key to mobile device designs including smartphones, laptops, tablets, and those very mobile devices known as cars. Thin-and-light batteries are certainly the order of the day, but those designs depend on high density, light weight energy storage. As a result, any battery technology that can pack three times as much energy into a particular form-factor has a very significant effect on device size and weight, and on how end-users can effectively put mobile devices to work.
Enter the Engineers
The team had previously used sponge-like silicon films which are difficult for manufacturers to use in typical processes. The Rice University engineers advanced to the next level by crushing the porous silicon film to form porous silicon particulates in a powdered form that can easily be used by battery manufacturers. Crushing the films into powder produces more than 50 times additional surface area to soak up lithium ions.
Rice University researcher Madhuri Thakur said: “As a powder, they can be used in large-scale roll-to-roll processing by industry. The material is very simple to synthesize, cost-effective and gives high energy capacity over a large number of cycles.”
Steven Sinsabaugh, a Lockheed Martin Fellow, said this endeavor “will provide a significant improvement in battery technology by the development of this inexpensive manufacturing technique for silicon anode material”.
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