16. 2 minute charge? Impossible!

Patent application

Bruce Dunn

This material can charge in 2.5 minutes, > 10,000x.

Currently commercial lithium ion batteries typically charge in 1.5 – 2 hours. ‘Fast charge’ is limited to 30 – 45 minutes and with harsh consequences on cycle life and safety. However, there are battery electrode materials which blur the capacitor/battery line. MoS2 has been claimed by professor Dunn (UCLA) to be such a “pseudocapacitor”. This podcast discusses a patent claiming a pseudocapacitor electrode material which can charge in 2.5 minutes for > 10,000x and with a capacity > 120mAh/g.

> 10,000 cycles with no capacity fade at a charge/discharge rate of 23C (which corresponds to 2.5 minute charge). Capacity is stable > 120 mAh/g.
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