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As temperatures fall below freezing, lithium-ion batteries cannot hold as much charge, so they do not recharge very well. Researchers from China’s Jiaotong University say they have now overcome this problem by replacing the traditional graphite anode in these devices with a “bumpy” carbon-based material. The new structure maintains its rechargeable storage capacity down to -20°C, allowing it to be used in cold environments such as those found at high altitudes, in aerospace applications, and for deep-sea exploration, as well as in other electric vehicles that need to work in extreme conditions.

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