Enhancing hydrogen storage performance of MgH2 through the addition of BaMnO3 synthesized via solid-state method |
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| Affiliation: | 1. Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia;2. Department of Electrical and Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kem Sungai Besi, Kuala Lumpur, Malaysia;1. College of Ecology, Taiyuan University of Technology, Taiyuan 030024, China;2. School of Chemistry and Chemical Engineering, Guangxi Minzu University, Nanning 530006, China;3. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China;4. College of Physics, Taiyuan University of Technology, Taiyuan 030024, China;1. Renewable Energy Research Centre, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima, 963-0298, Japan;2. Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan;3. Department of Chemical Science and Engineering, National Institute of Technology, Tokyo College, 1220-2 Kunugida, Hachioji, Tokyo, 193-0997, Japan;4. Department of Applied Chemistry, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan;1. Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Malaysia;2. Center of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;3. Department of Chemical and Environmental Engineering, Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia;4. Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;1. Postgraduate Program in Materials Science and Engineering (PPGCEM), Materials Engineering Department (DEMa), Federal University of Sao Carlos (UFSCar), Rod. Washington Luiz, KM 235, Sao Carlos, Sao Paulo, 13565-905, Brazil;2. Polytechnic Institute, Rio de Janeiro State University, Bonfim, 25, Nova Friburgo, Rio de Janeiro, 28625-570, Brazil;1. College of Materials Science and Engineering, Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China;2. Jiangsu JITRI Advanced Energy & Materials Research Institute Co., Ltd. Central Iron & Steel Research Institute, 5-C Chongyi Road, Changzhou 213032, P.R. China;3. Advanced Materials Research Institute, North China Electric Power University, No.2 Beinonglu Changping District, Beijing 102206, P.R. China;4. Institute of Biomedical Engineering and Health Sciences, School of Pharmacy & School of Medicine, Changzhou University, Changzhou 213164, P.R. China;1. State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, Jiangsu, PR China;2. State Grid Smart Grid Research Institute Co., Ltd., Beijing 102200, PR China;3. Guangxi Novel Battery Materials Research Center of Engineering Technology, Guangxi Colleges and Universities Key Laboratory of Blue Energy and Systems Integration, School of Physical Science and Technology, Guangxi University, Nanning 530004, PR China |
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| Abstract: | Currently, magnesium hydride (MgH2) as a solid-state hydrogen storage material has become the subject of major research owing to its good reversibility, large hydrogen storage capacity (7.6 wt%) and affordability. However, MgH2 has a high decomposition temperature (>400 °C) and slow desorption and absorption kinetics. In this work, BaMnO3 was synthesized using the solid-state method and was used as an additive to overcome the drawbacks of MgH2. Interestingly, after adding 10 wt% of BaMnO3, the initial desorption temperature of MgH2 decreased to 282 °C, which was 138 °C lower than that of pure MgH2 and 61 °C lower than that of milled MgH2. For absorption kinetics, at 250 °C in 2 min, 10 wt% of BaMnO3-doped MgH2 absorbed 5.22 wt% of H2 compared to milled MgH2 (3.48 wt%). Conversely, the desorption kinetics also demonstrated that 10 wt% of BaMnO3-doped MgH2 samples desorbed 5.36 wt% of H2 at 300 °C within 1 h whereas milled MgH2 only released less than 0.32 wt% of H2. The activation energy was lowered by 45 kJ/mol compared to that of MgH2 after the addition of 10 wt% of BaMnO3. Further analyzed by using XRD revealed that the formation of Mg0·9Mn0·1O, Mn3O4 and Ba or Ba-containing enhanced the performance of MgH2. |
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| Keywords: | Magnesium hydride Hydrogen storage Solid-state storage |
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