Lithium batteries for polar or space use -Lithium - Ion Battery Equipment

my country develops lithium batteries for polar or space use -Lithium - Ion Battery Equipment

Xinhua News Agency, Washington, March 1. Chinese scientists have developed a lithium battery that can be used at minus 70 degrees Celsius. It is expected to be used in extremely cold regions of the earth and even in outer space in the future.

Research published in the latest issue of the American energy academic journal "Joule" shows that the new battery developed by Xia Yongyao's team at Fudan University in China uses ethyl acetate, which has a low freezing point and can conduct electricity at extremely low temperatures, as the electrolyte, and uses two organic compounds were used as electrodes, namely the PTPAn cathode and the PNTCDA anode, respectively.(Lithium - Ion Battery Equipment)

Electrolyte is a chemical medium for ions to move between two electrodes, but the electrochemical reaction at the junction of electrolyte and electrodes is difficult to sustain at low temperature.

Unlike electrodes used in conventional lithium batteries, the organic compounds used in this electrode do not rely on an "intercalation process," which does not require intercalation of lithium ions into the electrode's molecular matrix, avoiding the slowing down of the intercalation process at low temperatures, the researchers said. .

Xia Yongyao said: "The ethyl acetate electrolyte and organic polymer electrodes allow the rechargeable battery to work at extremely low temperatures of minus 70 degrees Celsius."

The performance of traditional lithium batteries is only 50% of its optimal level at minus 20 degrees Celsius, and only 12% of the optimal level at minus 40 degrees Celsius. Extremely cold regions such as Russia and Canada have temperatures below minus 50 degrees Celsius; in space, the temperature is even as low as minus 157 degrees Celsius.

Xia Yongyao said that compared with the electrode materials of traditional lithium batteries, the materials of the new batteries are sufficient, cheap and environmentally friendly, and he expects the price of this material to be only about one-third of the former.

But the researchers admit that the main challenge to commercialization is that the battery's energy per mass is not comparable to commercial lithium-ion batteries, and the production process needs to be optimized. Nevertheless, Xia Yongyao believes that it has significant application potential.



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