Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries
碩士 === 國立臺北科技大學 === 機械工程系機電整合碩士班 === 106 === Li-ion battery plays a significant role in portable electronic devices in the running world. However, its capacity and energy density are still insufficient to provide battery for mainstream electric vehicles in the future. Li-oxygen (Li-O2) battery fulfi...
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ndltd-TW-106TIT056510162019-07-04T05:59:52Z http://ndltd.ncl.edu.tw/handle/n4py3z Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries 量子點/奈米碳管之光陰極複合材料應用於鋰氧電池陰極觸媒 Yu-Hsiang Chen 陳昱翔 碩士 國立臺北科技大學 機械工程系機電整合碩士班 106 Li-ion battery plays a significant role in portable electronic devices in the running world. However, its capacity and energy density are still insufficient to provide battery for mainstream electric vehicles in the future. Li-oxygen (Li-O2) battery fulfills these energy requirements. However, the overpotential and stability still need to be improved. Hence, we developed a photocathode nanocomposite material composed of Cadmium Selenide/Zinc Sulfide Quantum Dots with Carbon Nanotube (CdSe/ZnS QDs@CNT) for an efficient and tunable performance of the photoelectrochemical Li−O2 battery system to overcome the key issue of overpotential. These networks can provide efficient transportation paths of the electron−hole pairs and the O2 gas and lithium ions, respectively. The charging voltage of the photoelectrode is 4.0 V; therefore, decreased overpotential was due to efficient oxidation of Li2O2 by photoexcited electron−hole pairs by using QDs, resulting in a long-term operational stability over 100 cycles. On the basis of the advantages, the QDs exhibit efficient potential in Li-O2 battery. 魏大華 2018 學位論文 ; thesis 64 zh-TW |
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碩士 === 國立臺北科技大學 === 機械工程系機電整合碩士班 === 106 === Li-ion battery plays a significant role in portable electronic devices in the running world. However, its capacity and energy density are still insufficient to provide battery for mainstream electric vehicles in the future. Li-oxygen (Li-O2) battery fulfills these energy requirements. However, the overpotential and stability still need to be improved. Hence, we developed a photocathode nanocomposite material composed of Cadmium Selenide/Zinc Sulfide Quantum Dots with Carbon Nanotube (CdSe/ZnS QDs@CNT) for an efficient and tunable performance of the photoelectrochemical Li−O2 battery system to overcome the key issue of overpotential. These networks can provide efficient transportation paths of the electron−hole pairs and the O2 gas and lithium ions, respectively. The charging voltage of the photoelectrode is 4.0 V; therefore, decreased overpotential was due to efficient oxidation of Li2O2 by photoexcited electron−hole pairs by using QDs, resulting in a long-term operational stability over 100 cycles. On the basis of the advantages, the QDs exhibit efficient potential in Li-O2 battery.
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魏大華 |
author_facet |
魏大華 Yu-Hsiang Chen 陳昱翔 |
author |
Yu-Hsiang Chen 陳昱翔 |
spellingShingle |
Yu-Hsiang Chen 陳昱翔 Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
author_sort |
Yu-Hsiang Chen |
title |
Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
title_short |
Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
title_full |
Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
title_fullStr |
Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
title_full_unstemmed |
Quantum Dots/CNT Nanocomposite Photocathode for Improvement on Charge Overpotential in Photoelectrochemical Li-O2 Batteries |
title_sort |
quantum dots/cnt nanocomposite photocathode for improvement on charge overpotential in photoelectrochemical li-o2 batteries |
publishDate |
2018 |
url |
http://ndltd.ncl.edu.tw/handle/n4py3z |
work_keys_str_mv |
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