Sekisui Chemical develops high-capacity film-type Lithium-ion battery with silicon anode; triple the capacity
|Sample of the film-type Li-ion battery developed by Sekisui Chemical. Click to enlarge.|
Sekisui Chemical Co., Ltd. has developed a high-capacity film-type lithium-ion battery with a silicon anode using a coating process that has simultaneously tripled the battery capacity (900Wh/L) compared to other Sekisui Chemical products; increased its safety (as shown by nail penetration tests or crush tests); and sped up production by ten times (compared to other Sekisui Chemical products).
The new cells feature high lithium-ion conductivity (approximately ten times compared to other Sekisui products) with enhanced safety through the use of a high-performance gel-type electrolyte. Sekisui Chemical used its original materials technology to enable the application the novel high-performance gel-type electrolytes using a coating process instead of the standard vacuum infusion process.
By further adding its newly developed high-capacity silicon anode material in this process, the company can provide high-capacity film-type lithium-ion batteries with high productivity while being flexible, slim, long and covering a large area. (The company has not yet discussed cycle life for the Si anode battery.)
The cells can offer large savings in terms of space (a third the size of previous products for comparable density) and can be installed in any shape or form, giving rise to a large number of applications in automobiles, houses, appliances and so on, according to the company.
The assumed size of film-type lithium-ion batteries is currently 200cm long, 30cm wide, and 0.3-5mm thick, however, the size will differ according to the design capacity and application.
The process technology was developed with support from the Advanced Technology Research Project for the Application and Commercial Use of Lithium-Ion Batteries being run by the New Energy and Industrial Technology Development Organization (NEDO).
Sekisui said that it will be exploring mass production with these film-type lithium-ion batteries, aiming at quickly realizing products for a variety of uses, including electric vehicles. The company will begin providing samples starting around next summer (2014).
The company will present the research at Eco-Products 2013 in Tokyo, 12-14 December.
(A hat-tip to RK!)