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Hybrid nickel-metal hydride/hydrogen battery
Affiliation:1. Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8530, Japan;2. Natural Science Center for Basic Research and Development, Hiroshima University, 1-3-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8530, Japan;3. Graduate School of Engineering, Hiroshima University, 1-4-1, Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan;1. Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;2. Exergy Power Systems, Inc., Komaba Open Laboratory 501, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan;1. Natural Science Centre for Basic Research and Development, Hiroshima University, 739-8530, Japan;2. Materials Processing & Corrosion Engineering Division, Bhabha Atomic Research Centre, Mumbai 400 085, India;2. Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092 El Manar, Tunis, Tunisia;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;2. College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;3. Department of Chemistry and Department of Physiology and Function Genomics, Center for Research at the Bio/Nano Interface, Shands Cancer Center and UF Genetics Institute, University of Florida, Gainesville, FL 32611-7200, United States
Abstract:High capacity, high efficiency and resource-rich energy storage systems are required to store large scale excess electrical energy from renewable energy. We proposed “Hybrid Nickel-Metal Hydride/Hydrogen (Ni-MH/H2) Battery” using high capacity AB5-type hydrogen storage alloy and high-pressure H2 gas as negative electrode active materials. It was experimentally confirmed that hydrogen gas can be utilized as an active material of negative electrode by the presence of the AB5-type hydrogen storage alloy. The experimental average cell voltage suggested that H2 gas passed through the alloy in the form of atoms. The calculated gravimetric energy density of this hybrid battery increased up to 1.5 times of the conventional Ni-MH battery with low content of rare-earth element which is 32 wt% of the Ni-MH battery.
Keywords:Nickel metal hydride battery  Metal hydride  High dissociation pressure  High-pressure hydrogen  Energy storage
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