Solid polymer electrolytes, which have a low bandgap and a high dielectric constant, are an interesting technology for optoelectronic applications and supercapacitors. This work studies the influence of Mg, Cu, Ni or Cd acetates on the structural and optical properties and the dielectric relaxation phenomena in carboxymethyl cellulose sodium salt (CMC)/polyvinylpyrrolidone (PVP) blends. The dielectric behavior, ac conductivity and electrical modulus formalism were investigated in a frequency range of up to 1 MHz at room temperature. X-ray diffraction energy dispersive x-ray, Fourier transform infrared spectroscopy and scanning electron microscopy, revealed modifications of the films’ structural and chemical compositions and their morphology. UV–Vis and dielectric properties measurements revealed that the Cu and Mg salts had more distinctive influences on the optical properties, ac conductivity (\( \sigma_{\rm{ac}} ) \) and relaxation behavior. Cu and Mg reduced the optical bandgap E_g of the CMC/PVP blends from 5.1 eV to 4.7 eV and 3.6 eV, respectively, but increased \( \sigma_{\rm{ac}} \) from 8.61 × 10⁻⁵ S/cm to 1.34 × 10⁻⁴ S/cm and 1.81 ×10⁻⁴ S/cm, respectively. The dielectric measurements revealed an increase in the dielectric constant and dielectric losses for the composite films, which reflect the enhancement of the dielectric polarization of the films. The electric modulus spectra, calculated relaxation time and Argand plots confirmed an improvement in the ionic conductivity of the composite films. These results indicate that the incorporation of the acetate salts is a simple approach to widening the technological importance of CMC/PVP blend films for some optoelectronic devices and Cu and Mg battery applications.

具有低带隙和高介电常数的固体聚合物电解质是光电子应用和超级电容器中令人感兴趣的技术。这项工作研究了Mg，Cu，Ni或Cd醋酸盐对羧甲基纤维素钠盐（CMC）/聚乙烯吡咯烷酮（PVP）共混物的结构和光学性质以及介电弛豫现象的影响。在室温下，在高达1 MHz的频率范围内研究了介电性能，交流电导率和电模量形式。X射线衍射能量色散X射线，傅立叶变换红外光谱和扫描电子显微镜揭示了膜的结构和化学组成及其形态的改变。\（\ sigma _ {\ rm {ac}}）\）和松弛行为。Cu和Mg分别将CMC / PVP混合物的光学带隙E _g从5.1 eV降低到4.7 eV和3.6 eV，但\（\ sigma _ {\ rm {ac}} \）从8.61×10 ^-5  S /厘米至1.34×10 ^-4  S / cm和1.81×10 ^-4 S / cm。介电测量表明复合膜的介电常数和介电损耗增加，这反映了膜的介电极化的增强。电模量谱，计算的弛豫时间和Argand图证实了复合膜的离子电导率的改善。这些结果表明，加入乙酸盐是一种简单的方法，可以扩大CMC / PVP共混膜在某些光电器件以及Cu和Mg电池应用中的技术重要性。