Under the support of NSFC project (approval No.: 61921005), Professor Song Hucheng, associate researcher of Nanjing University, Professor Xu Jun and Professor He Ping worked with Professor Zhou Haoshen to propose to use solar photothermal battery (sptb) technology to solve the charge transfer and storage problem of all solid-state lithium battery at low temperature. The research results are entitled "solar driven all solid state lithium-air batteries operating at extreme low temperatures" and published on Energy & amp; environmental science on March 2, 2020
https://pubs.rsc.org/en/content/articlehtml/2020/ee/c9ee04039k）。
Power battery is an indispensable component of new energy vehicles. In recent years, the safety problems such as fire and combustion caused by short circuit have always been the "stumbling block" in the development of new energy vehicles. Compared with the traditional lithium-ion battery based on liquid electrolyte, all solid state lithium metal battery has the advantages of high specific energy, safety, wide operating temperature and electrochemical window, which is one of the effective ways to solve the safety problems of power battery. However, due to the low ion transport in solid electrolyte, electrolyte interface and electrode materials, it is difficult for all solid-state lithium batteries to work effectively below zero ℃, which has become the bottleneck of its application.
In response to this challenge, the research team put forward the method of using sptb technology to realize the efficient work of all solid state lithium-air battery at ultra-low temperature on the basis of the previous solar thermal conversion and all solid state lithium-ion battery research. The air positive electrode with plasmon effect is designed to capture sunlight efficiently and convert it into heat to improve the charge transfer and storage efficiency of the battery at ultra-low temperature. The test results show that the photoinduced heat can effectively improve the charge transfer and storage in the electrolyte / electrode materials, even at ultra-low temperature (- 73oc), the impedance of the battery is two orders of magnitude lower than the original technology. At the same time, the battery can release ~ 3600 MAH g-1 capacity at - 73oc, and show excellent cycling performance at room temperature - 73oc.
The project work provides a new technical path for the development of high-density solid-state batteries with wide temperature range, and opens up a new idea for the development of power batteries.
Disclaimer:
The content of this article is selected from the National Natural Science Foundation of China, and the copyright is owned by the original author. The purpose of the reprint is to convey more information, which does not mean that the official account agrees with its views and is responsible for its authenticity. If you have any questions about the content, copyright and other issues of the work, please call or write to us, and we will deal with them in time!
A kind of
More excellent recommendations, please follow us
A kind of