Recently, Professor Zhou Zhen of Nankai University Chemistry School made important progress in the research of new energy storage system-rechargeable lithium-carbon dioxide battery. The research group first used graphene as the air electrode of lithium-carbon dioxide battery, and used lithium metal as negative electrode to absorb Carbon dioxide in the air releases energy.
As we all know, the global warming is mainly caused by the massive emission of greenhouse gases such as carbon dioxide. How to reduce the emission of carbon dioxide has become a common concern in today's society. If we can change carbon dioxide waste into resources utilization is an ideal way, and this has become a hot and difficult international research.
Lithium-oxygen battery discharges from the air to obtain oxygen, re-release of oxygen when charging, it is known as "breathable" batteries. This new energy storage system is very similar to lithium-oxygen batteries, except that oxygen is replaced by carbon dioxide, which can be referred to as "breathable battery 2.0". Although still very elementary compared to the "Breathing Cell" Lithium-Oxygen battery, the results of the Seismic Research Group are of great importance in promoting the application of carbon dioxide in the energy storage and conversion field and in leaping lithium-oxygen batteries to lithium-air batteries .
The idea of ​​rechargeable lithium-carbon dioxide cells burst out of an experiment three years ago, led by Dr. Su Liwei, a member of the research group (who graduated in 2013), found that lithium carbonate batteries do have unusually high lithium storage capacity and produce carbon dioxide during the reaction bubble. Since then, Zhang Zhang, a Ph.D. student, has started to set up a research platform for lithium-oxygen batteries. After repeated experiments by team members and continuous improvement of electrode performance, graphene was first used as an air electrode for lithium-carbon dioxide batteries and exhibited excellent performance. Times above, it is the highest level so far. The improvement of the performance of lithium-carbon dioxide battery benefits from the high conductivity and large specific surface area of ​​graphene, which provides a good place for electrochemical reaction.
At present, the research of rechargeable lithium-carbon dioxide battery has just started, the basic principle has not yet been fully understood, and its kinetic performance and charge-discharge cycling ability are poor, and further research is needed. Relevant research results published in chemistry, one of the top three traditional top journals, "Applied Chemistry (International Edition)", and was selected as a hot topic editors, Ph.D. Zhang Chang was the first author of the paper, Zhou Zhen correspondent. The research has been funded by the National Natural Science Foundation of China and the Ministry of Education.
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