Recently, Professor Chen Jun, a professor of chemistry at Nankai University, made breakthrough breakthroughs in the field of CO2-respirable sodium-carbon dioxide batteries that can be used at room temperature. Relevant research results have been published on Applied Chemistry in Germany at "Room temperature sodium-carbon dioxide rechargeable batteries." After the publication, the Chemical Society of the British Chemical Society reported on the topic "The First Fillible Future Battery Technology."
The primary version of the "Breathing" battery is a lithium-oxygen battery: it uses metallic lithium as the negative electrode and the positive electrode as an air electrode made of carbon, noble metal or transition metal oxide, etc., which discharges oxygen from the air during discharge and discharges during charging Oxygen, so called "breathable" batteries. The research of lithium-oxygen battery is the hot and difficult point in today's new energy field. Many universities and research institutes all over the world devote themselves to this. Chen Jun team in the previous lithium - oxygen battery research, based on the successful development of sodium - carbon dioxide battery, not only rich in raw materials, easy preparation, the same time, carbon dioxide waste into treasure, to achieve the resource utilization.
Chen Jun led the research group in the sodium-carbon dioxide battery research, through theoretical calculations found that the battery system has a theoretical specific energy of up to 1100Wh / kg, and more easily than other metal-carbon dioxide batteries to achieve reversible charge-discharge reaction. Because of its absorption of carbon dioxide discharge, charging also release carbon dioxide, it is called "breathable sodium - carbon dioxide batteries." In this study, sodium metal sheets were used as the negative electrode and tetraglyme treated multi-walled carbon nanotubes were used as the positive electrode to construct a sodium-carbon dioxide cell with excellent performance. At room temperature, the battery system can be cycled 200 times without obvious attenuation, showing good reversible charge-discharge activity and stability. At a high current density of 4A / g, there is still a reversible specific capacity of 4000 mAh / g, indicating that the battery has good high-rate discharge performance and can be rapidly charged and discharged.
Chen Jun introduced metal-gas battery, there are many scientific and technological problems. "However, metal-carbon dioxide cells are characterized by high specific energies and high power density. Electrode actives are cheap and readily available. In particular, the use of carbon dioxide as an active material to generate electricity means that the battery system is expected to be where such greenhouse gas enrichment Provide a steady source of energy. "
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