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This innovative material, leveraging an enhanced rock-salt structure, promises to usher in a new era of energy storage solutions that are more affordable, safer, and higher in capacity. Details of the findings were published in the Journal of Materials Chemistry A on March 15, 2024. The study showcases a considerable improvement in magnesium (Mg) diffusion within a rock-salt structure, a critical advancement since the denseness of atoms in this configuration had previously impeded Mg migration. By introducing a strategic mixture of seven different metallic elements, the research team created a crystal structure abundant in stable cation vacancies, facilitating easier Mg insertion and extraction. This represents the first utilization of rocksalt oxide as a cathode material for RMBs. The high-entropy strategy employed by the researchers allowed the cation defects to activate the rocksalt oxide cathode. Schematics of the battery and present cathode material. The present material contains many metal elements as cations thanks to the effect of the high configurational entropy. ©Tohoku University   The development also addresses a key limitation of RMBs - the difficulty of Mg transport within solid materials. Until now, high temperatures were necessary to enhance Mg mobility in conventional cathode materials, such as those with a spinel structure. However, the material unveiled by Tohoku University researchers operates efficiently at just 90°C, demonstrating a significant reduction in the required operating temperature. Tomoya Kawaguchi, a professor at Tohoku University&＃39;s Institute for Materials Research (IMR), notes the broader implications of the study. "Lithium is scarce and unevenly distributed, whereas magnesium is abundantly available, offering a more sustainable and cost-effective alternative for lithium-ion batteries. Magnesium batteries, featuring the newly developed cathode material, are poised to play a pivotal role in various applications, including grid storage, electric vehicles, and portable electronic devices, contributing to the global shift towards renewable energy and reduced carbon footprints." Kawaguchi collaborated with Tetsu Ichitsubo, also a professor at IMR, who states, "By harnessing the intrinsic benefits of magnesium and overcoming previous material limitations, this research paves the way for the next generation of batteries, promising significant impacts on technology, the environment, and society." Ultimately, the breakthrough is a major step forward in the quest for efficient, eco-friendly energy storage solutions. (2024/4/1 updated)   Publication Details Title Securing cation vacancies to enable reversible Mg insertion/extraction in rocksalt oxides Authors Tomoya Kawaguchi, Masaya Yasuda, Natsumi Nemoto,  Kohei Shimokawa, Hongyi Li, Norihiko L. Okamoto, and Tetsu Ichitsubo Journal Journal of Materials Chemistry A DOI 10.1039/D3TA07942B Online publication date March 15, 2024 Press release online (in Japanese) PDF:  790KB   Structure-Controlled Functional Materials Research Laboratory Next Previous NewsNewsNews2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003Research2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998Awards2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003News2020 2019 2018Reports2024 2018 2017Information2022 2021 2020 2019 2018 2017Open Position2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2013 Sitemap About IMRAbout IMRDirector’s GreetingPrinciple and MissionHistorySuccessive DirectorsOrganization MapPersonnel / Budget202320222021202020192018201720162015201420132012201120102009200820072006Research Divisions 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