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<p>Preface</p> <p><b>1 Flexible Asymmetric Supercapacitors: Design, Progress and Challenges<br /></b><i>Dun Lin, Xiyue Zhang, and Xihong Lu</i></p> <p>1.1 Introduction</p> <p>1.2 Configurations of AFSCs Device</p> <p>1.3 Progress of Flexible AFSCs</p> <p>1.3.1 Sandwich-type AFSCs</p> <p>1.3.2 Fiber-type ASCs</p> <p>1.4 Summary</p> <p><b>2 Stretchable Supercapacitors<br /></b><i>La Li and Guozhen Shen</i></p> <p>2.1 Overview of Stretchable Supercapacitors</p> <p>2.2 Fabrication of Stretchable Supercapacitors</p> <p>2.2.1 Structures of Stretchable Fiber-shaped SCs</p> <p>2.2.2 Planar Stretchable SCs</p> <p>2.2.3 3D Stretchable SCs</p> <p>2.3 Multifunctional Supercapacitor</p> <p>2.3.1 Compressible SCs</p> <p>2.3.2 Self-healable SCs</p> <p>2.3.3 Stretchable Integrated System</p> <p>2.3.4 Perspective</p> <p><b>3 Fiber-shaped Supercapacitors<br /></b><i>Mengmeng Hu, Qingjiang Liu, Yao Liu, Jiaqi Wang, Jie Liu, Panpan Wang, Hua Wang, and Yan Huang</i></p> <p>Introduction</p> <p>3.1 Structure of FSSCs</p> <p>3.2 Electrolyte</p> <p>3.3 Electrode</p> <p>3.3.1 Carbon-based Materials</p> <p>3.3.2 Conducting Polymers</p> <p>3.3.3 Metal-based Materials</p> <p>3.3.4 Mxenes</p> <p>3.3.5 Metal Organic Frameworks (MOFs)</p> <p>3.3.6 Polyoxometalates (POMs)</p> <p>3.3.7. Black Phosphorus (BP)</p> <p>3.4 Electrode Design of FSSCs</p> <p>3.4.1 Metal-fiber Supported Electrode</p> <p>3.4.2 Carbon Materials Based Fiber Supported Electrode</p> <p>3.5 Functionalized FSSCs</p> <p>3.5.1 Self-healable FSSCs</p> <p>3.5.2 Stretchable FSSCs</p> <p>3.5.3 Electrochromic FSSCs</p> <p>3.5.4 Shape-memory FSSCs</p> <p>3.5.5 Photodetectable FSSCs</p> <p>3.6 Conclusion</p> <p><b>4 Flexible Fiber-shaped Supercapacitors: Fabrication, Design, and Applications<br /></b><i>Muhammad S. Javed, Peng Sun, Muhammad Imran, and Wenjie Mai</i></p> <p>4.1 Introduction to Fiber-shaped Supercapacitors</p> <p>4.2 Emerging Techniques for the Fabrication of Fiber-shaped Electrodes</p> <p>4.2.1 Wet spinning Method</p> <p>4.2.2 Spray/Cast-coating Method</p> <p>4.2.3 Hydrothermal Method</p> <p>4.3 Structures and Design/Configuration of Fiver-shaped Electrodes</p> <p>4.3.1 Parallel-fiber Electrodes</p> <p>4.3.2 Twisted-fiber Electrodes</p> <p>4.3.3 Coaxial-fiber Electrodes</p> <p>4.3.4 Rolled-fiber Electrodes</p> <p>4.4 Materials for Fiber-shaped Supercapacitors</p> <p>4.4.1 Carbon-based Materials for FFSC</p> <p>4.4.2 Metal Oxides and their Composite-based Materials for FFSC</p> <p>4.5 Electrolytes for Fiber-shaped Supercapacitors</p> <p>4.6 Performance evaluation Metrics for Fiber-shaped Supercapacitors</p> <p>4.7 Applications</p> <p>4.8 Conclusion and Future Prospectus</p> <p><b>5 Flexible Supercapacitors Based on Ternary Metal Oxide (Sulfide, Selenide) Nanostructures<br /></b><i>Qiufan Wang, Daohong Zhang, and Guozhen Shen</i></p> <p>5.1 Introduction</p> <p>5.1.1 Background of Electrochemical Capacitors</p> <p>5.1.2 Performance Evaluation of SCs</p> <p>5.2 Ternary Metal Oxide</p> <p>5.2.1 1D Ternary Metal Oxide Nanostructural Electrodes</p> <p>5.2.2 2D Ternary Metal Oxide Nanostructural Electrodes</p> <p>5.2.3 3D Ternary Oxide Electrodes</p> <p>5.2.4 Cire-shell Ternary Metal Oxide Composite Electrodes</p> <p>5.3 Metal Sulfide Electrodes</p> <p>5.3.1 1D Metal Sulfide Electrodes</p> <p>5.3.2 2D Metal Sulfide Electrodes</p> <p>5.3.3 3D Metal Sulfide Electrodes</p> <p>5.3.4 Metal Sulfide Composite Electrodes</p> <p>5.4 Metal Selenide Electrodes</p> <p>5.4.1 1D Metal Selenide Electrodes</p> <p>5.4.2 2D Metal Selenide Electrodes</p> <p>5.4.3 3D Metal Selenide Electrodes</p> <p>5.5 Fiber-shaped SCs</p> <p>5.6 Summary and Perspectives</p> <p><b>6 Transition Metal oxide-based Electrode Materials for Supercapacitors<br /></b><i>Xiang Wu</i></p> <p>6.1 Introduction</p> <p>6.2 Co3O4 Electrode Materials</p> <p>6.3 NiO Electrode Materials</p> <p>6.4 Fe2O3 Electrode Materials</p> <p>6.5 MnO2 Electrode Materials</p> <p>6.6 V2O5 Electrode Materials</p> <p><b>7 Three-Dimensional Nanoarrays for Flexible Supercapacitors<br /></b><i>Jing Xu</i></p> <p>7.1 Introduction</p> <p>7.2 Fabrication of 3D Nanoarrays</p> <p>7.2.1 Selection of substrates</p> <p>7.2.2 Synthesis Methods of Flexible 3D Nanoarrays</p> <p>7.3 Typical Structural Engineering of 3D Nanoarrays</p> <p>7.3.1 Basic 3D Nanoarrays for Flexible Supercapacitors</p> <p>7.3.2 Hybrid 3D Nanoarrays for Flexible Supercapacitors</p> <p>7.4 Evaluation of Flexible Supercapacitors</p> <p>7.4.1 Bending Deformation</p> <p>7.4.2 Stretching Deformation</p> <p>7.4.3 Twisting Deformation</p> <p>7.5 Conclusion</p> <p><b>8 Metal Oxides Nanoarray Electrodes for Flexible Supercapacitors<br /></b><i>Ting Meng and Cao Guan</i></p> <p>8.1 Introduction</p> <p>8.2 Synthesis Techniques of Metal Oxide Nanoarrays</p> <p>8.2.1 Solution-based Route</p> <p>8.2.2 Electrodeposition Growth</p> <p>8.2.3 Chemical Vapor Deposition</p> <p>8.3 The Flexible Support Substrate for Loading Nanoarrays</p> <p>8.3.1 3D Porous Graphene Foam</p> <p>8.3.2 Carbon Cloth Current Collectors</p> <p>8.3.3 Metal Conductive Substrates</p> <p>8.4 The Geometry of Nanostructured Arrays</p> <p>8.4.1 The 1D Nanostructured Arrays</p> <p>8.4.2 The 2D Nanostructured Arrays</p> <p>8.4.3 The Integration of 1D@2D Nanoarrays</p> <p>8.5 Conclusions and Prospects</p> <p><b>9 Printed Flexible Supercapacitors<br /></b><i>Yizhou Zhang and Wen-Yong Lai</i></p> <p>9.1 Overview of Printed Flexible Supercapacitor</p> <p>9.2 Devices Structure of Printed SCs</p> <p>9.3 Printable Materials for SCs</p> <p>9.3.1 Carbon-based Materials</p> <p>9.3.2 Electrolytes</p> <p>9.3.3 Flexible substrates</p> <p>9.4 Fabrication of Flexible SCs Using Various Printing Methods</p> <p>9.4.1 Inkjet Printing</p> <p>9.4.2 Screen Printing</p> <p>9.4.3 Transfer Printing</p> <p>9.4.4 3D Printing</p> <p>9.5 Printed Integrated System</p> <p>9.6 Perspective</p> <p><b>10 Printing Flexible On-chip Micro-Supercapacitors<br /></b><i>Guozhen Shen</i></p> <p>10.1 Introduction</p> <p>10.2 Printable Materials for On-chip MSCs</p> <p>10.2.1 Printable Electrode Materials</p> <p>10.2.2 Printable Current Collector</p> <p>10.2.3 Printable Electrolyte</p> <p>10.3 Printing Techniques</p> <p>10.3.1 Inkjet Printing</p> <p>10.3.2 Spray Printing</p> <p>10.3.3 Screen Printing</p> <p>10.4 Summary</p> <p><b>11 Recent advances of flexible micro-supercapacitors<br /></b><i>Zhiqiang Niu</i></p> <p>11.1 Introduction</p> <p>11.2 General Features of Flexible MSCs</p> <p>11.3 Active Materials of Flexible MSCs</p> <p>11.3.1 Graphene-based Materials</p> <p>11.3.2 CNT-based Materials</p> <p>11.3.3 Other Carbon-based Materials</p> <p>11.3.4 Transition Metal Oxides and Hydroxides</p> <p>11.3.5 MXenes</p> <p>11.3.6 Conductive Polymer</p> <p>11.4 Integration of Flexible MSCs</p> <p>11.4.1 Flexible Self-charging MSCs</p> <p>11.4.2 Flexible Self-powering MSCs</p> <p>11.5 Flexible Smart MSCs</p> <p>11.5.1 Flexible Self-healing MSCs</p> <p>11.5.2 Flexible Electrochromic MSCs</p> <p>11.5.3 Flexible Photodetectable MSCs</p> <p>11.5.4 Flexible Thermoreversible Self-protecting MSCs</p> <p>11.6 Summary and Prospects</p>

<p><b>Guozhen Shen, PhD,</b> is Professor at the Institute of Semiconductors, Chinese Academy of Sciences, Beijing. His research is focused on flexible and printable electronics.</p> <p><b>Zheng Lou, PhD,</b> is Assistant Professor at the Institute of Semiconductors, Chinese Academy of Sciences, Beijing. His research focuses on printable and flexible electronics, like transistors, photodetectors, sensors, and energy storage devices. <p><b>Di Chen, PhD,</b> is Professor at the University of Science and Technology in Beijing. Her research is focused on the design of nanoscale materials for energy applications.

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