1：Experimental Design and Method Selection:

The study involved synthesizing CTAB-MMT/PVDF composite thin films via solution casting method to enhance electroactive β-phase and dielectric properties. The films were characterized and used to fabricate a piezoelectric nanogenerator (CMPENG) and a self-charged photo-power cell (PPC).

2：Sample Selection and Data Sources:

Samples included pure PVDF and PCM composite films with varying mass percentages of CTAB-MMT (1-5%). Data were obtained from characterization techniques and device performance tests.

3：List of Experimental Equipment and Materials:

Equipment included FESEM (INSPECT F50), XRD (Model-D8, Bruker), FTIR (FTIR 8400S, Shimadzu), LCR meter (Agilent E4980A), digital multi-meter (Agilent U1252A), electrometer (Keysight B2985A), and oscilloscope (Keysight DSO-X 3012A). Materials included PVDF (Aldrich), DMSO (Merck), CTAB-MMT, MnO2-MWCNT, PVP (Loba Chemie), H3PO4 (Merck), silver electrodes, copper wires, PET, FTO glass, and aluminum foil.

4：Experimental Procedures and Operational Workflow:

PCM films were prepared by stirring and sonicating mixtures, casting in petri dishes, and drying. CMPENG was fabricated by pasting silver electrodes on PCM3 film and sealing with PET. PPC was fabricated by depositing MnO2-MWCNT/PVP/H3PO4 on FTO glass and attaching PCM3 film. Characterization involved FESEM, XRD, FTIR, dielectric measurements, and device performance tests under mechanical force and light illumination.

5：Data Analysis Methods:

Data were analyzed using equations for β-phase fraction, dielectric constant, ac conductivity, fill factor, energy conversion efficiency, storage efficiency, overall efficiency, specific capacitance, energy density, and power density. Statistical analysis was not explicitly mentioned.