Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification
碩士 === 逢甲大學 === 化學工程學系 === 104 === The main aim of this research is to develop rechargeable Zinc-air battery using composite carbon materials as the air cathode. In the first part of the research, biological carbon nano-fiber (Bio-CNF) was developed by carbonizing bacterial cellulose (BC) as support...
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ndltd-TW-104FCU050630062017-09-03T04:25:59Z http://ndltd.ncl.edu.tw/handle/50261575848961994055 Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification 利用生物複合碳材於可充式鋅空氣電池之陰極修飾 Yu-chien Kuo 郭聿倩 碩士 逢甲大學 化學工程學系 104 The main aim of this research is to develop rechargeable Zinc-air battery using composite carbon materials as the air cathode. In the first part of the research, biological carbon nano-fiber (Bio-CNF) was developed by carbonizing bacterial cellulose (BC) as support materials for cathode. The BC was produced through fermentation using factory’s waste byproducts. The effect of temperature on carbonization was also observed. Through BET analysis, it was observed that carbonizing BC at 1100°C (Bio-CNF1100) led to highest surface area and significantly thinner than other carbon materials. Hence, the Bio-CNF1100 results into higher gas permeability and smaller reduction current. Nitrogen-doped carbon nanotube (N-CNT) was added to Bio-CNF in order to decrease three phase phenomenon caused by high gas permeability. Bifunctional air electrode was synthesized from CoO, Co3O4 and Ni-Fe on different carbon supports. It was found that electrode with composition of CoO/(Bio-CNF1100:N-CNT;1:1) acts as the oxygen reduction reaction (ORR) site and has higher activity than Pt. The cycling of long time, it showed 0.75 V of overpotential at first cycle and after 55 hours was 1.03 V at 5 mA/cm2. The cycling of short time, it showed 1.13 V of overpotential at first cycle and 1.74 V after 100 cycles at 20 mA/cm2. In the second part, the research selected electrode composition with preferred performance electrical catalysts was mixed in different proportions with Ni-Fe LDH/N-CNT. Although Ni-Fe LDH/N-CNT don’t lead to ORR, it has better oxygen evolution reaction (OER). The cycling of long time, CoO/(Bio-CNF1100:N-CNT;1:1) when mixed with Ni-Fe LDH/N-CNT in the three ratios (1 : 1, 1 : 2, 2 : 1) has lower overpotential (about 1.5 V) than other tested catalysts composition. In conclusion, utilizing CoO/(Bio-CNF1100:N-CNT;1:1)/Ni-Fe LDH/N-CNT ratio is 1 : 2 led to highest power density of 17.7 mW/cm2 吳石乙 2016 學位論文 ; thesis 110 zh-TW |
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碩士 === 逢甲大學 === 化學工程學系 === 104 === The main aim of this research is to develop rechargeable Zinc-air battery using composite carbon materials as the air cathode. In the first part of the research, biological carbon nano-fiber (Bio-CNF) was developed by carbonizing bacterial cellulose (BC) as support materials for cathode. The BC was produced through fermentation using factory’s waste byproducts. The effect of temperature on carbonization was also observed. Through BET analysis, it was observed that carbonizing BC at 1100°C (Bio-CNF1100) led to highest surface area and significantly thinner than other carbon materials. Hence, the Bio-CNF1100 results into higher gas permeability and smaller reduction current. Nitrogen-doped carbon nanotube (N-CNT) was added to Bio-CNF in order to decrease three phase phenomenon caused by high gas permeability. Bifunctional air electrode was synthesized from CoO, Co3O4 and Ni-Fe on different carbon supports.
It was found that electrode with composition of CoO/(Bio-CNF1100:N-CNT;1:1) acts as the oxygen reduction reaction (ORR) site and has higher activity than Pt. The cycling of long time, it showed 0.75 V of overpotential at first cycle and after 55 hours was 1.03 V at 5 mA/cm2. The cycling of short time, it showed 1.13 V of overpotential at first cycle and 1.74 V after 100 cycles at 20 mA/cm2.
In the second part, the research selected electrode composition with preferred performance electrical catalysts was mixed in different proportions with Ni-Fe LDH/N-CNT. Although Ni-Fe LDH/N-CNT don’t lead to ORR, it has better oxygen evolution reaction (OER). The cycling of long time, CoO/(Bio-CNF1100:N-CNT;1:1) when mixed with Ni-Fe LDH/N-CNT in the three ratios (1 : 1, 1 : 2, 2 : 1) has lower overpotential (about 1.5 V) than other tested catalysts composition.
In conclusion, utilizing CoO/(Bio-CNF1100:N-CNT;1:1)/Ni-Fe LDH/N-CNT ratio is 1 : 2 led to highest power density of 17.7 mW/cm2
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author2 |
吳石乙 |
author_facet |
吳石乙 Yu-chien Kuo 郭聿倩 |
author |
Yu-chien Kuo 郭聿倩 |
spellingShingle |
Yu-chien Kuo 郭聿倩 Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
author_sort |
Yu-chien Kuo |
title |
Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
title_short |
Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
title_full |
Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
title_fullStr |
Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
title_full_unstemmed |
Bio-CNF and N-CNT Composites for Rechargeable Zinc-Air Battery Cathode Modification |
title_sort |
bio-cnf and n-cnt composites for rechargeable zinc-air battery cathode modification |
publishDate |
2016 |
url |
http://ndltd.ncl.edu.tw/handle/50261575848961994055 |
work_keys_str_mv |
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