Flexible Supercapacitors

Materials and Applications

Guozhen Shen, Zheng Lou, Di Chen, Guozhen Shen, Zheng Lou, Di Chen

• Publisher: Wiley
• Year: 2022
• Print ISBN:
  9781119506164
• eBook ISBN:
  9781119506157
• Edition: 1
• Topic: Physical Sciences
• Subtopic: Condensed Matter

FLEXIBLE SUPERCAPACITORS

Comprehensive coverage of the latest advancements in flexible supercapacitors

In Flexible Supercapacitors: Materials and Applications, a team of distinguished researchers deliver a comprehensive and insightful exploration of the foundational principles and real-world applications of flexible supercapacitors. This edited volume includes contributions from leading scientists working in the field of flexible supercapacitors.

The book systematically summarizes the most recent research in the area, and covers fundamental concepts of electrode materials and devices, including on-chip microsupercapacitors and fiber supercapacitors. The latest progress and advancements in stretchable supercapacitors and healable supercapacitors are also discussed, as are problems and challenges commonly encountered in the development of flexible supercapacitors. The book concludes with suggestions and fresh perspectives on future research in this rapidly developing field.

Flexible Supercapacitors: Materials and Applications also offers:

• A thorough introduction to the fundamentals of supercapacitors, including their materials and devices
• Comprehensive explorations of flexible fiber supercapacitors and two-dimensional materials for flexible supercapacitors
• In-depth examinations of flexible supercapacitors with metal oxides-based electrodes and flexible on-chip microsupercapacitors
• Practical discussions of stretchable and healable supercapacitors, as well as patterned nanostructured electrodes

Perfect for researchers in the fields of materials science, physics, and electrical engineering, Flexible Supercapacitors: Materials and Applications is also an ideal reference for developers interested in supercapacitor design, materials, and devices.

1
Flexible Asymmetric Supercapacitors: Design, Progress, and Challenges

Dun Lin, Xiyue Zhang and Xihong Lu

MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low‐Carbon Chem and Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat‐Sen University, Guangzhou, Guangdong, 510275, People’s Republic of China

1.1 Introduction

Recently, flexible electronic products, such as flexible microphones [1], elastic circuits [2–4], pressure and strain sensors [5–7], artificial skin sensors [8–10], intelligent garments [11], and wearable health monitoring devices have boomed as a new and important field of modern electronics (Figure 1.1). Therefore, the development of suitable energy storage devices, which can serve as an excellent power supply while sustaining high mechanical flexibility, are becoming increasingly necessary to power these electronics [13–21]. Supercapacitors (SCs), also known as electrochemical capacitors or ultracapacitors, have emerged as the bridge between batteries and traditional capacitors due to their promising merits of high power density (about 10 kW kg⁻¹), good reversibility, excellent cyclic stability (over 10⁶ cycles), and safety [22, 23]. Meanwhile, accompanied with the advanced development of lightweight, foldable, and stretchable materials, substantial effort has been invested in the fabrication of flexible supercapacitors (FSCs) [24–28].

In order to satisfy the further demand for practical usage, the configuration of the two electrodes as well as the geometry of the devices are of vital importance and worth careful considerations [29]. The major obstacle of early designed FSCs is their relatively low energy density (E) to mismatch basic requirements of future applications. Thus, tremendous efforts have been denoted to optimize the overall performance of FSCs according to the Eq. (1.1), without sacrificing their power density and service life.

(1.1)

In general, either enhanced capacitance (C) or enlarged operating voltage (V) of the device should make sense. Of which, the C of a FSC device can be equivalent to the negative electrode capacitance (C _n) and positive electrode capacitance (C _p) connected in series (Figure 1.2a), which can be calculated using Eq. (1.2)

(1.2)

Figure 1.1 (a, b) Scheme and optical image of a flexible acoustic device.

Source: Reproduced with permission from Ref. [121], © 2017, Springer Nature.

Optical image of (c) a flexible circuit

Source: Reproduced with permission from Ref. [2], © 2018, NPG

, (d) multiplexed fingerprint sensor. Scale bar, 1 cm.

Source: Reproduced with permission from Ref. [5], © 2018, NPG

and (e) artificial skin electronics

Source: Reproduced with permission from Ref. [8], © 2018, NPG.

(f) 3 × 3 honeycomb‐like supercapacitor array powering LED panel.

Source: Reproduced with permission from Ref. [13], © 2017, Wiley.

(g) Image of an array of field‐effect heterojunctions on textile.

Source: Reproduced with permission from Ref. [14], © 2017, NPG.

(h, i) Fabrication and optical image of the fiber‐shaped Al‐air battery.

Source: Reproduced with permission from Ref. [15], © 2016, Wiley...

Table of contents

• Cover
• Table of Contents
• Title Page
• Copyright Page
• List of Contributors
• Preface
• 1 Flexible Asymmetric Supercapacitors
• 2 Stretchable Supercapacitors
• 3 Fiber‐shaped Supercapacitors
• 4 Flexible Fiber‐shaped Supercapacitors:
• 5 Flexible Supercapacitors Based on Ternary Metal Oxide (Sulfide, Selenide) Nanostructures
• 6 Transition Metal Oxide Based Electrode Materials for Supercapacitors
• 7 Three‐Dimensional Nanoarrays for Flexible Supercapacitors
• 8 Metal Oxides Nanoarray Electrodes for Flexible Supercapacitors
• 9 Printed Flexible Supercapacitors
• 10 Printing Flexible On‐chip Micro‐Supercapacitors
• 11 Recent Advances of Flexible Micro‐Supercapacitors
• Index
• End User License Agreement