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Research published in the latest issue of the US energy academic journal Joule shows that Xia Yongyao's team at Fudan University in China has developed a lithium battery that can be used at -70 °C, which is expected to be used
in the extremely cold regions of the earth and even outer space in the future.
The electrolyte is a chemical medium in which ions move between two electrodes, but the electrochemical reaction at the junction of the electrolyte and the electrode is difficult to sustain
at low temperatures.
The researchers say that unlike the electrodes used in traditional lithium batteries, the organic compounds used in this electrode do not rely on the "embedding process", that is, there is no need to embed lithium ions into the molecular matrix of the electrode, avoiding the slow
embedding process at low temperatures.
Xia Yongyao said that the performance of traditional lithium batteries at -20 °C is only 50% of its optimal level, and only 12%
of the optimal level at -40 °C.
Temperatures in extremely cold regions such as Russia and Canada are below -50°C, and in space, temperatures are even as low as -157°C
.
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 such materials to be only about one-third
of the former.
The researchers acknowledge that the main challenge in achieving commercialization is that the mass energy of such batteries is not comparable to that of commercially available lithium batteries, and the production process needs to be optimized
.
Nevertheless, Xia Yongyao believes that it has significant application potential
.
Research published in the latest issue of the US energy academic journal Joule shows that Xia Yongyao's team at Fudan University in China has developed a lithium battery that can be used at -70 °C, which is expected to be used
in the extremely cold regions of the earth and even outer space in the future.
The electrolyte is a chemical medium in which ions move between two electrodes, but the electrochemical reaction at the junction of the electrolyte and the electrode is difficult to sustain
at low temperatures.
The researchers say that unlike the electrodes used in traditional lithium batteries, the organic compounds used in this electrode do not rely on the "embedding process", that is, there is no need to embed lithium ions into the molecular matrix of the electrode, avoiding the slow
embedding process at low temperatures.
Xia Yongyao said that the performance of traditional lithium batteries at -20 °C is only 50% of its optimal level, and only 12%
of the optimal level at -40 °C.
Temperatures in extremely cold regions such as Russia and Canada are below -50°C, and in space, temperatures are even as low as -157°C
.
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 such materials to be only about one-third
of the former.
The researchers acknowledge that the main challenge in achieving commercialization is that the mass energy of such batteries is not comparable to that of commercially available lithium batteries, and the production process needs to be optimized
.
Nevertheless, Xia Yongyao believes that it has significant application potential
.