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Contact CORE RESEARCH CLUSTERTOHOKU UNIVERSITY 日本語 Search HOME CORE RESEARCH CLUSTER for MATERIALS SCIENCE ABOUT US RESEARCH PROJECT RESEARCH PROJECT Advanced Energy Materials Project Advanced Electronic Materials Project Biomaterials Project Materials Development Based on Microstructure Control Project High Strength Materials Project Mathematical Science and Computation Evaluation and Sensing Processing Education and Human Resources Development INTERNATIONAL PRESENCE NEWS ＆ EVENTS PUBLICITY NEWS PUBLIC Search TOP ABOUT US RESEARCH PROJECT Advanced Energy Materials Project Advanced Electronic Materials Project Biomaterials Project Materials Development Based on Microstructure Control Project High Strength Materials Project Mathematical Science and Computation Evaluation and Sensing Processing Education and Human Resources Development INTERNATIONAL PRESENCE NEWS ＆ EVENTS Tohok UniversityCreating GlobalExcellence Core Research Cluster for Materials Science Advanced Institute for Materials Research Institute for Materials Research Institute of Multidisciplinary Research for Advanced Materials School of Engineering Department of Metallurgy, Materials Science and Materials Processing Department of Applied Chemistry, Chemical Engineering and Biomolecular Engineering Graduate School of Science and Faculty of Science News and Events NEWS Press release Date uploaded: April 21, 2023 Back to list Discovery of New Carbon Material to Extend Lithium Air Battery Life Graphene Mesosponge Overcomes Degradation of Conventional Carbon Cathode Press Release 20230410 Key Points of the Announcement A material that overcomes the degradation of carbon cathode, which is a challenge for the practical application of lithium-air batteries, has been discovered. Using a new carbon material, graphene mesosponge (GMS), a high capacity of 6700 mAh/g and a charge-discharge cycle life more than six times longer than that of existing carbon cathode materials have been achieved. The topological defect structure that gives GMS its high performance was elucidated both theoretically and experimentally. Summary Lithium-air batteries are next-generation storage batteries that are expected to achieve energy densities several times higher than current lithium-ion batteries, but their severe degradation and inability to be repeatedly charged and discharged have been major issues. In this research, an interdisciplinary research team from Tohoku University, Shinshu University, Okayama University, Osaka University, Institute of Inorganic Chemistry of Slovak Academy of Sciences, University of Natural Resources and Life Sciences (Austria), and Shanghai Tech University (China) has developed a new carbon cathode material to extend the life of lithium air batteries. Lithium air batteries use carbon material for the positive electrode and lithium metal for the negative electrode, and charge and discharge are performed by the deposition and decomposition of lithium peroxide on the positive electrode. A wide variety of carbon cathode materials such as carbon black, carbon nanotubes, and activated carbon have been investigated, but the major issue is that all of these materials deteriorate quickly and cannot be repeatedly charged and discharged. In this research, by using graphene mesosponge (GMS), a new carbon material developed by Tohoku University for the first time in the world, for the cathode, the capacity of 6700 mAh/g was achieved, far exceeding the capacity of carbon cathode materials reported so far, and the charge-discharge cycle life was six times longer than that of conventional carbon cathodes cycle life of more than six times longer than that of conventional carbon cathode. Furthermore, by precisely analyzing the nanostructure of GMS using advanced analytical methods, mathematical analysis, and theoretical calculations, we have clarified the material design guidelines for achieving both high performance and high durability. In the future, this research is expected to lead to the practical application of lithium-air batteries in the long term. The research results were published in the scientific journal Advanced Science on April 10, 2023 (local time). (The original press release is in Japanese) http://www.tohoku.ac.jp/japanese/2023/04/press20230410-02-carbon.html https://www.wpi-aimr.tohoku.ac.jp/jp/achievements/press/2023/20230410_001600.html Publication details Title: Edge-Site-Free and Topological-Defect-Rich Carbon Cathode for High-Performance Lithium-Oxygen Batteries Authors Wei Yu, Takeharu Yoshii, Alex Aziz, Rui Tang, Zheng-Ze Pan, Kazutoshi Inoue, Motoko Kotani, Hideki Tanaka, Eva Scholtzová, Daniel Tunega, Yuta Nishina, Kiho Nishioka, Shuji Nakanishi, Yi Zhou, Osamu Terasaki, Hirotomo Nishihara Journal Advanced Science, 2300268, 2023 DOI 10.1002/advs.202300268 Contact (Research) Professor　Hirotomo NISHIHARA E-mail: hirotomo.nishihara.b1[at]tohoku.ac.jp Please replace [at] with "@" in the email address. (Press) E-mail: aimr-outreach[at]grp.tohoku.ac.jp Please replace [at] with "@" in the email address. 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