Improvement of flexible lithium battery shelf life by pre-discharging |
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Authors: | Seung-Gyu LimEn Mei Jin Xing Guan ZhaoKyung-Hee Park Nam-In KimHal-Bon Gu Bok-Kee Park |
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Affiliation: | a Rocket Electric, R&D Center, 758 Ilgok-dong, Buk-gu, Gwangju 500-866, Republic of Korea b Department of Electrical Engineering, Chonnam National University, 300 Yongbong-dong, Gwangju 500-757, Republic of Korea c Department of Electrical Engineering, Howon University, 727 Impi-myeon Wolha-ri, Gunsan 573-718, Republic of Korea |
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Abstract: | Poly (methyl methacrylate) (PMMA)-based gel electrolyte has been used in flexible lithium batteries. These batteries are flexible and less than 0.5 mm thick, which make them suitable as power sources for smart cards and radio frequency identification (RFID) tags. We investigated the electrochemical properties of flexible lithium batteries using an impedance analyzer and potentiostat/galvanostat to evaluate the electrical capacities. To prevent the formation of gas by decomposition of electrolyte solvent, the batteries had to be pre-discharged about 5% of theoretical MnO2 capacity. Of the three kinds of pre-discharging methods, especially, battery two-step pre-discharging method was performed showed the best electrical properties after storage at 60 °C for 60 days. |
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Keywords: | Flexible lithium battery Gel electrolyte Pre-discharging |
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