Abstract
Biomass, as the most abundant and sustainable resource on the earth, has been regarded as an ideal carbon source to prepare various carbon materials. However, manufacturing shape-memory carbon aerogels with excellent compressibility and elasticity from biomass remains an open challenge. Herein, a cellulose-derived carbon aerogel with an anisotropic architecture is fabricated with the assistance of graphene oxide (GO) through a directional freeze-drying process and carbonization. The carbon aerogel displays excellent shape-memory performances, with high stress and height retentions of 93.6% and 95.5% after 1000 compression cycles, respectively. Moreover, the carbon aerogel can identify large ranges of compression strain (10–80%), and demonstrates excellent current stability during cyclic compression. The carbon aerogel can precisely capture a variety of biological signals in the human body, and thus can be used in wearable electronic devices.
Highlights
Biomass and Graphene Oxide.Carbon aerogels with a three-dimensional network have gained great attention in the applications in various wearable devices such as pressure sensors, flexible electrochemical energy storage, and others [1,2,3]
Some carbon aerogels with compressibility and elasticity have been fabricated by several nano building blocks, such as carbon nanotubes (CNT) [4,5,6], graphene [7,8,9,10], transition metal carbide/nitride (MXene) [11,12], and their composites
Jiang et al [13] prepared an MXene/reduced graphene oxide aerogel with high compressibility and elasticity, which can be applied in piezo resistive sensors
Summary
Carbon aerogels with a three-dimensional network have gained great attention in the applications in various wearable devices such as pressure sensors, flexible electrochemical energy storage, and others [1,2,3]. To meet these applications, carbon aerogels are required to possess shape-memory performances, such as reversible compressibility, elasticity, fatigue resistance, and high sensitivity. Jiang et al [13] prepared an MXene/reduced graphene oxide (rGO) aerogel with high compressibility and elasticity, which can be applied in piezo resistive sensors. Reducing the cost and environmental pollution is essential to the development of carbon aerogels
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