Publications
Detailed Information
Flexible Asymmetric Supercapacitor Twisted from Carbon Fiber/MnO2 and Carbon Fiber/MoO3
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 장정식 | - |
dc.contributor.author | 노정철 | - |
dc.date.accessioned | 2017-07-19T05:59:01Z | - |
dc.date.available | 2017-07-19T05:59:01Z | - |
dc.date.issued | 2017-02 | - |
dc.identifier.other | 000000140948 | - |
dc.identifier.uri | https://hdl.handle.net/10371/129441 | - |
dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2017. 2. 장정식. | - |
dc.description.abstract | Fiber-shaped supercapacitors are promising energy storage devices for future flexible and portable electronics. In this study, we report a fiber-shaped asymmetric supercapacitor (ASC) device made with the metal oxides having a large work function difference, directly grown on a flexible and conductive carbon fiber (CF) substrate. Specifically, carbon fiber/MnO2 (CF/MnO2) and carbon fiber/MoO3 (CF/MoO3) were fabricated using a simple electrodeposition method. The all-solid-state fiber-shaped ASC device was then assembled with CF/MnO2 as the positive electrode and CF/MoO3 as the negative electrode. The large work function difference between the metal oxides and the high conductivity of the CF substrate provided the ASC device with remarkable performance. In particular, it exhibited capacitance of 4.86 mF cm–2 and a wide operating voltage window of 2.0 V, which resulted in an excellent energy density of 2.70 μWh cm−2 and a power density of 0.53 mW cm−2. Also, it readily tolerated 3000 cycles of electrochemical testing and extreme mechanical deformation. Consequently, the outstanding performance and stability of the fiber-shaped ASC device shows great potential for future energy storage systems. | - |
dc.description.tableofcontents | Chapter 1. Introduction 1
1.1 Fiber-shaped supercapacitor 1 1.2 Asymmetric Supercpaacitor 2 1.3 Active Materials for asymmetric supercapacitors 3 1.4 Objectives and Outlines of the Study 5 1.4.1 Objectives 5 1.4.1 Outlines 6 Chapter 2. Experimental 8 2.1 Materials 8 2.2 Preparation of CF/MnO2 as the positive electrode 8 2.3 Preparation of CF/MoO3 as the negative electrode 9 2.4 Construction of the fiber-shaped supercapcaitor 10 2.5 Characterizations and electrochemical measurements 11 Chapter 3. Results and discussion 12 3.1 Fabrication of the positive and negative electrodes 12 3.1.1 Overall procedure 12 3.1.2 Characterizations 16 3.2 Electrochemical properties in a three electrode system 25 3.3 Fiber-shaped asymmetric supercapacitor 32 3.3.1 Construction of the supercapacitor 32 3.3.2 Electrochemical performance 33 3.3.3 Feasibility test 38 3.3.4 Performance evaluation 41 Chapter 4. Conclusion 45 References 46 국문초록 52 | - |
dc.format | application/pdf | - |
dc.format.extent | 3052614 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Fiber supercapacitor | - |
dc.subject | asymmetric supercapacitor | - |
dc.subject | work function | - |
dc.subject | MnO2 | - |
dc.subject | and MoO3 | - |
dc.subject.ddc | 660 | - |
dc.title | Flexible Asymmetric Supercapacitor Twisted from Carbon Fiber/MnO2 and Carbon Fiber/MoO3 | - |
dc.type | Thesis | - |
dc.description.degree | Master | - |
dc.citation.pages | 53 | - |
dc.contributor.affiliation | 공과대학 화학생물공학부 | - |
dc.date.awarded | 2017-02 | - |
- Appears in Collections:
- Files in This Item:
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.