Chinese scientists have made lithium-ion batteries suitable for use at -70°C
According to news Agency Xinhua, Chinese scientists from Fudan University have proposed a new type of electrolyte for lithium-ion batteries, expanding the use of such power sources. Presented by the Chinese chemists sample, unlike traditional lithium-ion batteries, designed to work even at extremely low temperatures. For comparison, the existing batteries with increased frost resistance already at temperatures above -40 °C lose about 90 % of the originally stated capacity.
To achieve battery life even at -70 °C was possible thanks to the unique electrolyte based on ethyl acetate, characterized by high conductivity in a wide temperature range. As electrodes of Chinese chemists chose the organic polymers from which was made the cathode and the anode. According to the results of repeated tests it turned out that Li-ion batteries based on the declared organic components lose when cooled to -70 °C about 30% of the original capacity, the value of which was recorded in the laboratory at room temperature.
The scope of such batteries can be industry that require intermittent recharging electronics due to the portable energy source. Of course, all this must occur in conditions where presented by scientists from China lithium ion batteries surpass the nearest analogues. To mind immediately comes to the space industry: low temperature, high reliability requirements of systems, and a high price to pay for the mistakes made in the design of the error.