近年來隨著可攜式和穿戴式的電子產品蓬勃發展，可撓式的高效能電池開發應運而生，而傳統鋰離子電池作為目前主要電源卻面臨幾個問題：(1)石墨作為其負極材料的比電容量(372 mA h g-1)已無法滿足高能量密度裝置的應用。(2)鋰金屬在地殼中的含量過於稀少且分布不均，造成鋰金屬的市場價格容易浮動。(3)傳統的漿料塗佈系統無法在連續彎曲凹折下保持原本形狀，容易產生短路影響使用者的安全。由於以上原因，許多研究團隊致力於開發新的可撓式儲能裝置，包括其他鹼金屬離子電池、超電容、燃料電池等等。在本研究中，我們利用二磷化銅和銅的雙層奈米線結構作為負極材料，而正極則是利用聚丙烯酸將3, 4, 9, 10-苝四羧酸二酐融入奈米碳管的導電網結構中，成功開發出可撓式的高效能鉀離子電池。

Recently, the portable and wearable electronic products are attracting great interest, leading to development of flexible high-performance battery. However, the traditional lithium-ion batteries, the main power of electronic products, face several problems as following: (1) As its anode material, the specific capacity of graphite is only 372 mA h g-1, it is no longer sufficient for high energy density devices. (2) The content of lithium metal within the earth’s crust is too rare and unevenly distributed, causing its market price floating easily. (3) The conventional slurry coating system can’t the original shape when bending continuously, causing a short circuit to affect the safety of the user. For these reasons, many researchers are working on new flexible energy storage devices, including other alkali metal ion batteries, supercapacitors, fuel cells, and more. In this study, we successfully developed a flexible high-performance potassium ion battery which is made up of a bilayer CuP2/Cu nanowires mesh structure as the negative electrode and PTCDA film as the positive electrode.

中文摘要 i
Abstract ii
Table of Contents iii
List of Figures iv
List of Tables vi
Chapter 1 Introduction 1
1.1 The development and challenge of lithium-ion battery 1
1.2 The application of flexible battery 4
1.3 The development of potassium-ion battery 5
Chapter 2 Experimental section 8
2.1 Materials 8
2.2 CuP2 nanowire synthesis 8
2.3 Copper nanowire synthesis 9
2.4 Preparation of the bilayer CuP2/Cu nanowire mesh anode electrode 10
2.5 Preparation of the weakly-oxidized carbon nanotubes 10
2.6 Preparation of the PTCDA film cathode electrode 10
2.7 Characterization 11
2.8 Potassium-Ion battery assembly and electrochemical characterization 11
2.9 Bending test for pouch type battery 12
Chapter 3 Result and discussion 13
3.1 Analysis of bilayer CuP2/Cu nanowire mesh electrode 13
3.2 Electrochemical performance of bilayer CuP2/Cu nanowire mesh electrode 15
3.3 Analysis and electrochemical performance of PTCDA film electrode 20
3.4 Full cell and bending test 23
Chapter 4 Conclusion 28
Reference 29

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