Abstract:Excellent
triboelectric charge density and hydrophobicity are achieved
on cellulose nanofibrils (CNFs) by employing a simple and environmentally
friendly approach to aminosilane modification of a CNF film. The positive
charges on the CNF surface obtain gigantic enhancement, and a CNF-based
triboelectric nanogenerator (TENG) with enhanced performance and moisture
resistance is prepared. The performance of this functional CNF-based
TENG can show outstanding output stability when the environmental
humidity is 70%… Show more
“…modified CNF with the amino group by eco‐friendly grafting of 9‐(2‐aminoethylamino)‐propyldimethoxymethylsilane (AEAPDMS) on the CNF (A‐CNF). [ 96 ] Figure 19B illustrates the A‐CNF TENG prepared with the FEP as an opposite triboelectric layer. The A‐CNF TENG produced an output voltage, current and charge of 195 V, 13.4 µA, and 65 nC.…”
Triboelectric nanogenerators (TENGs) were first developed in 2012, and have become the desirable choice as energy harvesters in the research community worldwide. The popularity of TENGs is attributed to their low weight, low cost, high output, wide range of materials and device designs. TENGs have been explored for many applications including sensing, implantable power sources, healthcare, and biomedical applications. The performance of TENGs depends largely on the material since charge density (σ) is a material property. Moreover, 2D materials have been investigated as an alternative to the conventional metal electrodes. The dominance of polymers and metals in the traditional triboelectric series has lead researchers to explore novel materials to extend the applications and improve TENG output. This review article summarizes the progress in the development of frictional layers and electrode materials for TENGs. The mechanism for the output enhancement and device applications are discussed in detail. Finally, a perspective on the future and relevant challenges in material development for TENGs are discussed.
“…modified CNF with the amino group by eco‐friendly grafting of 9‐(2‐aminoethylamino)‐propyldimethoxymethylsilane (AEAPDMS) on the CNF (A‐CNF). [ 96 ] Figure 19B illustrates the A‐CNF TENG prepared with the FEP as an opposite triboelectric layer. The A‐CNF TENG produced an output voltage, current and charge of 195 V, 13.4 µA, and 65 nC.…”
Triboelectric nanogenerators (TENGs) were first developed in 2012, and have become the desirable choice as energy harvesters in the research community worldwide. The popularity of TENGs is attributed to their low weight, low cost, high output, wide range of materials and device designs. TENGs have been explored for many applications including sensing, implantable power sources, healthcare, and biomedical applications. The performance of TENGs depends largely on the material since charge density (σ) is a material property. Moreover, 2D materials have been investigated as an alternative to the conventional metal electrodes. The dominance of polymers and metals in the traditional triboelectric series has lead researchers to explore novel materials to extend the applications and improve TENG output. This review article summarizes the progress in the development of frictional layers and electrode materials for TENGs. The mechanism for the output enhancement and device applications are discussed in detail. Finally, a perspective on the future and relevant challenges in material development for TENGs are discussed.
“…Nie et al performed simple aminosilane modification on CNFs and prepared an A-CNFs-based flexible TENG with increased frictional charge density. Figure 8 a shows the structure of TENG using A-CNFs film as the contact material and the working principle of TENG based on A-CNFs [ 161 ]. It was found that the voltage of TENG based on A-CNFs can be maintained at an almost constant level within 10,000 cycles, which indicated that its output performance was relatively stable and can provide sufficient voltage for electronic devices.…”
Section: Applications Of Cellulose Nanopapermentioning
confidence: 99%
“… Fig. 8 a Structure of a TENG that uses the A-CNFs film as a contact material, working principle of the A-CNFs-based TENG, and stability and durability test of the TENG after 10,000 cycles [ 161 ]. b Performance comparison of pure PDMS and PDMS/CNCFs, and illustration of the triboelectric contact electrification processes with the net electric field E in composite films along the direction from the PDMS to the top Al electrode [ 162 ].…”
Section: Applications Of Cellulose Nanopapermentioning
Cellulose nanopaper has shown great potential in diverse fields including optoelectronic devices, food packaging, biomedical application, and so forth, owing to their various advantages such as good flexibility, tunable light transmittance, high thermal stability, low thermal expansion coefficient, and superior mechanical properties. Herein, recent progress on the fabrication and applications of cellulose nanopaper is summarized and discussed based on the analyses of the latest studies. We begin with a brief introduction of the three types of nanocellulose: cellulose nanocrystals, cellulose nanofibrils and bacterial cellulose, recapitulating their differences in preparation and properties. Then, the main preparation methods of cellulose nanopaper including filtration method and casting method as well as the newly developed technology are systematically elaborated and compared. Furthermore, the advanced applications of cellulose nanopaper including energy storage, electronic devices, water treatment, and high-performance packaging materials were highlighted. Finally, the prospects and ongoing challenges of cellulose nanopaper were summarized.
“…At the same time, the content of C1s continued to increase, and the contents of O1s and O/C continued to decrease. This was because ethylenediamine destroyed the epoxy group of epichlorohydrin, grafted to the sample surface, and introduced a large amount of C (Junka et al, 2014;Nie et al, 2020).…”
As a green material, cellulose is widely used in friction triboelectric nanogenerators (TENGs). However, the weak polarity of the cellulose surface leads to its weak contact electrification performance, which is not conducive to its utilization in TENGs. In this study, epoxy chloropropane and ethylenediamine were grafted onto cellulose to form paper and were assembled with an FEP film. The output voltage, current, and surface charge density were 34.9%, 26.7%, and 16.7% higher than those of ordinary paper, respectively. When 20% nano TiO2 filler was added to the paper made from amino-modified cellulose, the output voltage, current, and surface charge density of the TENG increased by 70.9%, 226.7%, and 122.2%, respectively, compared with ordinary paper. As the air humidity of the TENG increased from 60% to 90%, the output voltage, current, and surface charge density were maintained at 53.7%, 38.9%, and 61.0%, respectively. When a 5 × 107 Ω resistor was connected to the working circuit, its output power reached 13.78 μ W·cm2. This showed that cellulose as a green material has wide application prospects in the field of TENG.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
