Abstract

With the increasing demand for high-performance electronic devices in smart textiles, various types of flexible/wearable electronic device (i.e., supercapacitors, batteries, fuel cells, etc.) have emerged regularly. As one of the most promising wearable devices, flexible supercapacitors from a variety of electrode materials have been developed. In particular, carbon materials from lignocellulosic biomass precursor have the characteristics of low cost, natural abundance, high specific surface area, excellent electrochemical stability, etc. Moreover, their chemical structures usually contain a large number of heteroatomic groups, which greatly contribute to the capacitive performance of the corresponding flexible supercapacitors. This review summarizes the working mechanism, configuration of flexible electrodes, conversion of lignocellulosic biomass-derived carbon electrodes, and their corresponding electrochemical properties in flexible/wearable supercapacitors. Technology challenges and future research trends will also be provided.

Highlights

  • Flexible One-Dimensional Fiber-Shaped ElectrodesOne-dimensional (1D) fiber-shaped electrodes have good flexibility, small size, light

  • Key Laboratory of Textile Science & Technology, Donghua University, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China

  • Cellulose, lignin or raw lignocellulosic biomass are converted into carbon electrodes for flexible supercapacitors by carbonization, activation and possible surface modification

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Summary

Flexible One-Dimensional Fiber-Shaped Electrodes

One-dimensional (1D) fiber-shaped electrodes have good flexibility, small size, light. Fiber-shaped electrodes have good flexibility, small size, light weight, charge/discharge process, long service life and good stability [40,41]

Flexiblefast
Flexible Two-Dimensional Planar Electrodes
Flexible
Flexible Three-Dimensional Aerogel Electrodes
Fabrication of Lignocellulose-Based Carbon
Cellulose
Carbonization
Activation
Physical Activation
Chemical Activation
Other Activation Methods
O steam
Surface Modification
Flexible Supercapcitors from Cellulose-Derived Carbon
M H2 SO4
M Na2 SO3
M TEABF4 in acetonitrile
Supercapacitors from Lignocellulose-Based Graphite
M Na2 SO4
Findings
Future Direction
Full Text
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