Researchers from Watt Lab, part of the Central Research Institute at Huawei Technology Corporation, unveiled new quick charging lithium-ion batteries at the 56th Battery Symposium in Japan. The new batteries charge 10 times faster than conventional Li-ion batteries, reaching about 50% capacity in mere minutes.
Huawei presented videos of the two types of quick charging lithium-ion batteries: one battery with a 600 mAh capacity that can be charged to 68% capacity in two minutes; another with a 3000 mAh capacity and an energy density above 620 Wh/L, which can be charged to 48% capacity in five minutes to allow ten hours of phone call on Huawei mobile phones.
To develop the fast-charing cells, Huawei engineers bonded heteroatoms to the graphite molecules in the anode. Introducing defects and heteroatom and/or functional groups into carbonaceous anode materials has been shown in other work to increase available active sites and effectively modulate the electronic and chemical character of the anode material.
Huawei stated that the heteroatoms increase the charging speed of batteries without decreasing energy density or battery life.