Flexible piezoelectric nanogenerators for energy harvesting are getting more and more attention nowadays by converting the mechanical energy to electric energy. Here, an environment-friendly piezoelectric nanogenerator based on the regenerated cellulose (RC)/MoS 2 nanosheet nanocomposite successfully exhibited a relative high output voltage of 2 V and current of 150 nA under slight press which were 5 and 7.5 times higher than those of the neat RC lm, i.e. 0.4 V and 20 nA, respectively. In particular, the MoS 2 nanosheets were obtained through a simple, facile and low-cost pathway by mechanical exfoliation in triethanolamine. The nanocomposite lm with MoS 2 nanosheet content of 4% exhibited a high piezoelectric constant (d 33 ) of 19 pC/N, which was 6.3 times higher than that of the neat RC lm (i.e. 3 pC/N). Thus, the RC/MoS 2 piezoelectric nanogenerator has great potential applications in the elds of energy harvester, sensors and is of great signi cance to environment protection. Highlights 1. MoS 2 nanosheets were prepared by facile exfoliation in triethanolamine.2. The MoS 2 nanosheets greatly improved the piezoelectricity of cellulose.3. The nanogenerator is exible and environment-friendly with high output performance.
Flexible piezoelectric nanogenerators for energy harvesting are getting more and more attention nowadays by converting the mechanical energy to electric energy. Here, an environment-friendly piezoelectric nanogenerator based on the regenerated cellulose (RC)/MoS2 nanosheet nanocomposite successfully exhibited a relative high output voltage of 2 V and current of 150 nA under slight press which were 5 and 7.5 times higher than those of the neat RC film, i.e. 0.4 V and 20 nA, respectively. In particular, the MoS2 nanosheets were obtained through a simple, facile and low-cost pathway by mechanical exfoliation in triethanolamine. The nanocomposite film with MoS2 nanosheet content of 4% exhibited a high piezoelectric constant (d33) of 19 pC/N, which was 6.3 times higher than that of the neat RC film (i.e. 3 pC/N). Thus, the RC/MoS2 piezoelectric nanogenerator has great potential applications in the fields of energy harvester, sensors and is of great significance to environment protection.
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