Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin

碩士 === 國立清華大學 === 材料科學工程學系 === 88 === Abstract The objectives of this work are to study the feasibility of fabrication of carbon electrode in lithium-ion battery by using epoxy novolac resin (ENR) as the precursor. Carbon powders with the particle size less than 32μm were obta...

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Main Authors: Fu-Tien-Wang, 王富田
Other Authors: Nyan-Hwa-Tai
Format: Others
Language:zh-TW
Published: 2000
Online Access:http://ndltd.ncl.edu.tw/handle/16749400530776743231
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spelling ndltd-TW-088NTHU01590232016-07-08T04:23:16Z http://ndltd.ncl.edu.tw/handle/16749400530776743231 Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin 添加奈米碳粉於碳化環氧樹脂中以製備鋰二次電池碳電極之研究 Fu-Tien-Wang 王富田 碩士 國立清華大學 材料科學工程學系 88 Abstract The objectives of this work are to study the feasibility of fabrication of carbon electrode in lithium-ion battery by using epoxy novolac resin (ENR) as the precursor. Carbon powders with the particle size less than 32μm were obtained by pyrolyzing the epoxy precursor. Various amounts of carbon nano powders with the average size of 20nm were introduced to the synthesis carbon powders. The effects of carbon nano powder on the charge-discharge capacity and efficiency of the carbon electrode were investigated. In this work, X-ray and Raman spectrum analysis were adopted to investigate the microstructure of ENR carbon powders treated under different temperatures. Specific surface area , density , and element analysis of the mixed carbon powders were also measured. Moreover, the slow-scan cyclic voltammetry(C-V) was applied to test the electrochemical properties of the mixed carbon powders. Based upon the X-ray and Raman spectrum analysis , it reveals that ENR carbon powder has amorphous structure which consists of single-carbon layer with the lateral size(La) of about 20~40A. The results of C-V test show that there is a broad oxidation peak around 0.5V~1.0V, which indicates the working voltage of the cells is unstable. The density increases with carbonization temperature; however, the specific surface area(BET) and [H]/[C] atomic ratio decrease with the temperature. The capacity and the irreversible capacity during the first charge-discharge cycle are affected by BET and [H]/[C] atomic ratio. In the first cycle of charge-discharge process, it is observed that ENR carbon powder fabricated under 8000C shows the highest charge capacity and irreversible capacity(48%). On the other hand, most of the carbon powders treated under four other temperatures show over higher irreversible capacity.In this study, although no positive effect on the electrochemical properties was observed when nano carbon powders were introduced, better understandings on the mechanisms of electrochemical properties of carbon electrode in lithium-ion battery were obtained. Nyan-Hwa-Tai Chi-Ioung-Lee 戴念華 李紫原 2000 學位論文 ; thesis 133 zh-TW
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language zh-TW
format Others
sources NDLTD
description 碩士 === 國立清華大學 === 材料科學工程學系 === 88 === Abstract The objectives of this work are to study the feasibility of fabrication of carbon electrode in lithium-ion battery by using epoxy novolac resin (ENR) as the precursor. Carbon powders with the particle size less than 32μm were obtained by pyrolyzing the epoxy precursor. Various amounts of carbon nano powders with the average size of 20nm were introduced to the synthesis carbon powders. The effects of carbon nano powder on the charge-discharge capacity and efficiency of the carbon electrode were investigated. In this work, X-ray and Raman spectrum analysis were adopted to investigate the microstructure of ENR carbon powders treated under different temperatures. Specific surface area , density , and element analysis of the mixed carbon powders were also measured. Moreover, the slow-scan cyclic voltammetry(C-V) was applied to test the electrochemical properties of the mixed carbon powders. Based upon the X-ray and Raman spectrum analysis , it reveals that ENR carbon powder has amorphous structure which consists of single-carbon layer with the lateral size(La) of about 20~40A. The results of C-V test show that there is a broad oxidation peak around 0.5V~1.0V, which indicates the working voltage of the cells is unstable. The density increases with carbonization temperature; however, the specific surface area(BET) and [H]/[C] atomic ratio decrease with the temperature. The capacity and the irreversible capacity during the first charge-discharge cycle are affected by BET and [H]/[C] atomic ratio. In the first cycle of charge-discharge process, it is observed that ENR carbon powder fabricated under 8000C shows the highest charge capacity and irreversible capacity(48%). On the other hand, most of the carbon powders treated under four other temperatures show over higher irreversible capacity.In this study, although no positive effect on the electrochemical properties was observed when nano carbon powders were introduced, better understandings on the mechanisms of electrochemical properties of carbon electrode in lithium-ion battery were obtained.
author2 Nyan-Hwa-Tai
author_facet Nyan-Hwa-Tai
Fu-Tien-Wang
王富田
author Fu-Tien-Wang
王富田
spellingShingle Fu-Tien-Wang
王富田
Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
author_sort Fu-Tien-Wang
title Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
title_short Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
title_full Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
title_fullStr Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
title_full_unstemmed Investigation on the properties of carbon electrode in the Lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
title_sort investigation on the properties of carbon electrode in the lithium-ion battery by adding nano-powder into the carbon powder prepared from epoxy resin
publishDate 2000
url http://ndltd.ncl.edu.tw/handle/16749400530776743231
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