Journal
NANO ENERGY
Volume 85, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105973
Keywords
Biomass; Multifunction; Carbon aerogel; Pressure sensors; Supercapacitors; Triboelectric nanogenerators
Categories
Funding
- National Natural Science Foundation of China [21978249, 21978248, 22075237]
- Natural Science Foundation of Fujian Province of China [2020J01007]
- Shenzhen Basic Research Program [JCYJ20190809161407424]
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The study synthesized nitrogen-doped carbon aerogels using a biomass-mediated strategy, showing elasticity, compressibility, and fatigue resistance, suitable for piezoresistive sensing devices. The interaction between C-GD and CNFs formed a super stable structure with ultra-high compression strain and wide-range linear sensitivity.
Nowadays, great effort has been devoted to designing carbon aerogels with compressibility, elasticity, wide linear sensitivity and multifunctional characteristics. Herein, a biomass-mediated strategy was applied to synthesize nitrogen doped carbon aerogels (C-NGD) by using the calcinated mixture of glucose & dicyandiamide nanosheets (C-GD) and cellulose nanofibers (CNFs) as sustainable, cheap and massive precursors. The synthesized C-NGD has considerable elasticity, compressibility and fatigue resistance. The interaction between C-GD and CNFs leads to a super stable wave-layered structure that can support an ultrahigh compression strain (95%) and long-term compression (3000 cycles, at a 50% strain). Particularly, a wide-range linear sensitivity can be obtained under 0-10 kPa, with a high sensitivity of 10.08 kPa-1. These advantages enable the carbon aerogel to be applied in wearable piezoresistive sensing devices to detect body motion and biosignals. Besides, C-NGD also shows potential applications for supercapacitors and triboelectric nanogenerators. Thus, this biomass-derived carbon aerogel is a kind of multifunctional material toward flexible electronics, and energy conversion/storage devices.
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