Abstract
Development of well-designed electrodes is the key to achieve high performance supercapacitors. Therefore, as one of the effective methods, a layer-by-layer (LBL) approach is often fruitfully employed for the fabrication of electrode material. Benefiting from a tunable parameter of the LBL approach, this approach has paved a way to design a highly ordered nanostructured electrode material with excellent performance. Conducting polymers (CPs) are the frontrunners in supercapacitors and notably, the LBL assembly of CPs is attracting extensive attention. Therefore, this critical review covers a comprehensive discussion on the research progress of CP-based composites with special importance on the LBL approach predominately for supercapacitors. Following a brief discussion on supercapacitors and CPs, the most up-to-date techniques used in LBL are highlighted.
Highlights
The 21st century has brought in a new revolution to our lifestyle
A simplified multilayer film assembled from negatively charged substrate with multiple immersion of simplified multilayer film assembled from negatively charged substrate with multiple immersion of polyelectrolytes in sequential order to allow the formation of n layers
The ultraviolet-visible (UV-vis) absorption spectra in this study showed the regular growth of multilayers, while ellipsometry recorded an increase in thickness as a function of the number of bilayers
Summary
Introduction high interest is centered on ultrathin films due to their aspiring usefulness in the field of optical, electrical and mechanical. The controlling surface properties, it is not applicable for multilayer fabrication [41] Compared to these self-assembled monolayers method is highly recommended for controlling surface properties, it is approaches, LBL assembly has been a versatile and reliable technique to construct multilayer films not applicable for multilayer fabrication [41]. Compared to these approaches, LBL assembly has been with the desired functions, morphologies, and structures to nanoscale precision. Compared with other a versatile and reliable technique to construct multilayer films with the desired functions, bottom-up approaches, the LBL assembly has more advantages and surpasses the limitation set by other morphologies, and structures to nanoscale precision. Eventually increases conductivity and electrochemical performance [42]
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