Ni-MH battery based on plasticized alkaline solid polymer electrolytes |
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Authors: | A A Mohamad A K Arof |
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Institution: | (1) School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;(2) Physics Department, Universiti Malaya, 50603 Kuala Lumpur, Malaysia |
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Abstract: | Solid-state nickel metal hydride cells were fabricated using plasticized alkaline solid polymer electrolytes (ASPE) prepared
from polyvinyl alcohol (PVA), potassium hydroxide (KOH), alumina (α-Al2O3), and propylene carbonate (PC). The ASPE film with PVA/KOH/α-Al2O3/PC/H2O weight ratio of 1.00:0.67:0.09:2.64:1.32 and conductivity of (6.6 ± 1.7) × 10−4 S cm−1 was used in fabrication of the electrochemical cells. To investigate the electrochemical properties of the plasticized ASPE,
cells with the configuration Mg2Ni/plasticized ASPE/Ni(OH)2 were fabricated. At the eighth cycle with a current drain of 0.1 mA and plateau voltage of ∼1.1 V, the discharge lasted for
14 h before the cell was considered to have failed. The failure mode of the cell was due to the formation of thin Mg(OH)2 insulating layers. |
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Keywords: | Ni-MH batteries Polymer electrolytes Mg2Ni alloy Polyvinyl alcohol Mg(OH)2 |
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