New anode in Toshiba SCiB battery provides 200 miles of range with a 6-minute charge

Oct 5, 2017   Tier Suppliers

Toshiba has developed a titanium niobium oxide anode material that it says will double lithium storage by volume of the graphite-based anodes used in lithium-ion batteries today.

Toshiba launched the SCiB as a safe, long-life, fast charging lithium-ion battery in 2008. Since then, the company has constantly refined the technology and improved real-world performance. For its next-generation SCiB, Toshiba has developed a titanium niobium oxide anode material (LTO) that has double the lithium storage capacity by volume of the graphite-based anodes generally used in lithium-ion batteries.

The new battery also offers high energy density and ultra-rapid recharging characteristics, and its titanium niobium oxide anode is much less likely to experience lithium metal deposition during ultra-rapid recharging or recharging in cold conditions—a cause of battery degradation and internal short circuiting.

Toshiba's current SCiB employs an LTO anode, and is known for excellent operating characteristics in respect of safety, long life and rapid charging. It has found wide use in vehicles and industrial and infrastructure applications, including automobiles, buses, railroad cars, elevators and power plants. The high energy density of the battery, and its rapid recharging, have made important contributions to enhancing the convenience and promoting the spread of EV.

Building on this heritage, Toshiba has developed a proprietary method for synthesising and disarranging crystals of titanium niobium oxide and storing lithium ions more efficiently in the crystal structure. The anode of the next-generation SCiB realised through this approach has double times the capacity of the anode of current lithium-ion batteries.

Dr. Osamu Hori, Director of Corporate Research & Development Center at Toshiba Corporation said: "Rather than an incremental improvement, this is a game changing advance that will make a significant difference to the range and performance of EV. We will continue to improve the battery's performance and aim to put the next-generation SCiB into practical application in fiscal year 2019."

Rigorous testing of a 50 Ah prototype of the new battery has confirmed that it retains the long life cycle, low-temperature operation, excellent safety and rapid recharging characteristics of the current SCiB. The energy density by volume of battery is twice that of the current SCiB. The next-generation SCiB maintains over 90% of its initial capacity after being put through 5,000 charge/discharge cycles, and ultra-rapid recharging can be done in cold conditions, with temperatures as low as minus 10 degrees C, in only ten minutes.

Toshiba will continue to develop higher energy density batteries that extend the range of EVs and support ultra-rapid recharging, and aims to commercialise the next-generation SCiB in fiscal year 2019.

Part of the research work on the next-generation SCiB was subsidised by Japan's New Energy and Industrial Technology Development Organisation (NEDO).

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