Improvement of desorption performance of Mg(BH4)2 by two-dimensional Ti3C2 MXene addition |
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| Affiliation: | 1. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, China;2. Central Iron & Steel Research Institute, Advanced Technology & Materials Co., Ltd, Jiangsu JITRI Advanced Energy & Materials Research Institute Co., Ltd., No.76 Xueyuannanlu, Haidian District, Beijing, 100081, China;3. Advanced Materials Research Institute, North China Electric Power University, No.2 Beinonglu Changping District, Beijing, 102206, China;1. U.S. DOE Ames Laboratory, Iowa State University, Ames, IA 500011-3020, USA;2. Department of Physics and Astronomy, University of Missouri, St. Louis, MO, 63121, USA;3. Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA;4. Department of Chemistry, Iowa State University, Ames, IA 50011, USA;1. Institute of Laser Advanced Manufacturing, Collaborative Innovation Center of High-end Laser Manufacturing Equipment, Zhejiang University of Technology, Hangzhou, 310014, China;2. State Key Laboratory of Silicon Materials and School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China;3. Laboratory for Energetics and Safety of Solid Propellants, Hubei Institute of Aerospace Chemotechnology, Xiangyang, 441003, China;4. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin, 300071, China;1. School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510641, People''s Republic of China;2. China-Australia Joint Laboratory for Energy & Environmental Materials, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, 510641, People''s Republic of China;3. Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Macau SAR, China;1. Institute of Problems of Chemical Physics RAS, 142432 Chernogolovka Moscow Region, Russia;2. NRC Kurchatov Institute, 1 Acad. Kurchatov Sq., Moscow 123182, Russia;3. Department of Inorganic Chemistry, Peoples'' Friendship University of Russia (RUDN University), 6 Miklukho-Maklay Str., Moscow 117198, Russia;1. School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China;2. College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China;3. College of Materials Science and Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, China;4. Institute of Advanced Wear & Corrosion Resistant and Functional Materials, Jinan University, Guangzhou 510632, China |
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| Abstract: | Magnesium borohydride (Mg(BH4)2) is an attractive materials for solid-state hydrogen storage due to its high hydrogen content (14.9 wt%). In the present work, the dehydrogenation performance of Mg(BH4)2 by adding different amounts (10, 20, 40, 60 wt%) of two-dimensional layered Ti3C2 MXene is studied. The Mg(BH4)2-40 wt% Ti3C2 composite releases 7.5 wt% hydrogen at 260 °C, whereas the pristine Mg(BH4)2 only releases 2.9 wt% hydrogen under identical conditions, and the onset desorption temperature decreases from 210 °C to a relative lower temperature of 82 °C. The special layered structure of Ti3C2 MXene and fluorine plays an important role in dehydrogenation process especially at temperatures below 200 °C. The main dehydrogenation reaction is divided into two steps, and activation energy of the Mg(BH4)2-40 wt% Ti3C2 composite is 151.3 kJ mol−1 and 178.0 kJ mol−1, respectively, which is much lower than that of pure Mg(BH4)2. |
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| Keywords: | Hydrogen storage materials MXene Ball-milling Hydrogen desorption performance |
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