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碩士 === 國立中央大學 === 化學學系 === 107 === Transition metal oxides as anode materials in lithium ion batteries have attracted immense attention in recent years due to their high theoretical capacities as compared with commercial graphite. However, the huge volume change during the charge-discharge process l...
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ndltd-TW-107NCU050650292019-10-22T05:28:12Z http://ndltd.ncl.edu.tw/handle/b2m5xv none 以Ni摻雜Mn3O4修飾管狀有序中孔洞碳材CMK-5於高能鋰離子電池負極材料之應用及複合式有機無機固(膠)態高分子電解質之結構鑑定與電化學特性研究 Yu-Hao Zeng 曾昱豪 碩士 國立中央大學 化學學系 107 Transition metal oxides as anode materials in lithium ion batteries have attracted immense attention in recent years due to their high theoretical capacities as compared with commercial graphite. However, the huge volume change during the charge-discharge process leads to unstable electrochemical performances. In first part, we design a nanocomposite of Ni-doped Mn3O4@CMK-5 to solve the problem. Mn3O4 has high theoretical capacity (937 mAh/g), natural abundance and low toxicity. Ordered mesoporous carbon CMK-5 has nanoscale uniform mesopore, large surface area and good conducting network for both Li ions and electrons. Nickel doping could avoid the drastic volume change and aggregation of nanoparticles. Ni-doped Mn3O4@CMK-5 display a high reversible capacity up to 1263 mAh/g enen after 50 cycles at a current density of 100 mAh/g. The Ni-doped Mn3O4@CMK-5 nanocomposite is expected to be a promising anode material for lithium-ion batteries. In second part, we design a new hybrid organic-inorganic polymer electrolyte, base on 4,4'-Methylene diphenyl diisocyanate (MDI), Jeffamine ED2003, and silica sources like GLYMO and MPEOPS. The solid polymer electrolyte(SPE) was measured the ion conductivity value of 1.11 × 10-4 S cm-1 at 30 °C. A maximum ion conductivity value of 1.86 × 10-3 S cm-1 is achieved for the gel polymer electrolytes(GPE) immersed in liquid electrolyte solution. And as the gel electrolyte, the test cell shows good cycling performance. The new hybrid polymer system hold promise for application in lithium ion batteries. Hsien-Ming Kao 高憲明 2019 學位論文 ; thesis 210 zh-TW |
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碩士 === 國立中央大學 === 化學學系 === 107 === Transition metal oxides as anode materials in lithium ion batteries have attracted immense attention in recent years due to their high theoretical capacities as compared with commercial graphite. However, the huge volume change during the charge-discharge process leads to unstable electrochemical performances. In first part, we design a nanocomposite of Ni-doped Mn3O4@CMK-5 to solve the problem. Mn3O4 has high theoretical capacity (937 mAh/g), natural abundance and low toxicity. Ordered mesoporous carbon CMK-5 has nanoscale uniform mesopore, large surface area and good conducting network for both Li ions and electrons. Nickel doping could avoid the drastic volume change and aggregation of nanoparticles. Ni-doped Mn3O4@CMK-5 display a high reversible capacity up to 1263 mAh/g enen after 50 cycles at a current density of 100 mAh/g. The Ni-doped Mn3O4@CMK-5 nanocomposite is expected to be a promising anode material for lithium-ion batteries.
In second part, we design a new hybrid organic-inorganic polymer electrolyte, base on 4,4'-Methylene diphenyl diisocyanate (MDI), Jeffamine ED2003, and silica sources like GLYMO and MPEOPS. The solid polymer electrolyte(SPE) was measured the ion conductivity value of 1.11 × 10-4 S cm-1 at 30 °C. A maximum ion conductivity value of 1.86 × 10-3 S cm-1 is achieved for the gel polymer electrolytes(GPE) immersed in liquid electrolyte solution. And as the gel electrolyte, the test cell shows good cycling performance. The new hybrid polymer system hold promise for application in lithium ion batteries.
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Hsien-Ming Kao |
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Hsien-Ming Kao Yu-Hao Zeng 曾昱豪 |
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Yu-Hao Zeng 曾昱豪 |
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Yu-Hao Zeng 曾昱豪 none |
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Yu-Hao Zeng |
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