A Novel Piezoelectric Paper-Based Flexible Nanogenerator Composed of Rochelle Salt Nanoparticles and Bacterial Cellulose

In this paper, Rochelle salt (RS) nanoparticles were doped into bacterial cellulose (BC) films, and BC/RS composite films with different RS mass fractions were prepared by physical blending. The effects of typical ferroelectric material additives on the dielectric and piezoelectric properties of BC were studied. A renewable flexible piezoelectric material with excellent properties was prepared. The dielectric and piezoelectric properties of the composite films with different RS ratios were tested in the laboratory. The results show that the introduction of the RS phase in RS/BC composite films has little effect on the original chemical structure of the materials. The sensitivity of the materials remained high while the piezoelectric constants of the materials were substantially enhanced, and the response curves were nearly linear in the face of different magnitudes of external forces. In addition, the introduction of the RS phase also improves the dielectric constant of the materials, thus optimizing its dielectric properties. The novel renewable flexible piezoelectric materials prepared in this paper contribute to the application of miniature piezoelectric nanogenerators in power systems.