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This research demonstrates the solid-state chemical synthesis of Na-doped SrCu 2 O 2 (SSCO) as an electrode material for application in electrochemical pseudocapacitors. The crystallographic, spectroscopic, and morphological analyses revealed the formation of an aggregated SSCO nanostructure with good crystallinity. The as-synthesized SSCO-modified carbon cloth (SSCO/ CC) electrode showed a pseudocapacitive-type electrochemical behavior in the voltage range between −0.2 and 0.8 V. The SSCO/ CC electrode delivered a specific capacity (C s ) of ca. 519.8 and 319 F g −1 at a scan rate of 5 mV s −1 and an applied current density of 0.9 A g −1 , respectively. These C s values of this SSCO material are substantially higher than that of the un-doped SCO. This increase is mainly due to the net enhancement of the electrical conductivity of the SCO materials upon Na doping, which concurrently enhances the rate of ion intercalation/de-intercalation into the tunnels of SSCO during charging/discharging. The electrode exhibited good electrochemical cycling stability with only a small increase in the charge-transfer resistance (R ct ) at the SSCO/CC electrode/electrolyte interface after CD cycling.

Owing to the nanometer size range, Quantum Dots (QDs) have exhibited unique physical and chemical properties which are favourable for different applications. Especially, due to their quantum confinement effect, excellent optoelectronic characteristics is been observed. This considerable progress has not only uplifted the singular usage of QDs, but also encouraged to prepare various hybrid materials to achieve superior efficiency by eliminating certain shortcomings. Such issues can be overcome by compositing QDs with polymers. Via employing polymer composite with QDs (PQDs) for supercapacitor applications, adequate conductivity, stability, excellent energy density, and better specific capacitance is been achieved which we have elaborately discussed in this review. Researchers have already explored various types of polymer nanocomposite with different QDs such as carbonaceous QDs, transition metal oxide/sulphide QDs etc. as electrode material for supercapacitor application. Synthesis, application outcome, benefits, and drawbacks of these are explained to portray a better understanding. From the existing studies it is clearly confirmed that with using PQDs electrical conductivity, electrochemical reactivity, and the charge accumulation on the surface have prominently been improved which effected the fabricated supercapacitor device performance. More comprehensive fundamentals and observations are explained in the current review which indicates their promising scopes in upcoming times.

Regenerative medicine, and dentistry offers enormous potential for enhancing treatment results and has been fueled by bioengineering breakthroughs over the previous few decades. Bioengineered tissues and constructing functional structures capable of healing, maintaining, and regenerating damaged tissues and organs have had a broad influence on medicine and dentistry. Approaches for combining bioinspired materials, cells, and therapeutic chemicals are critical in stimulating tissue regeneration or as medicinal systems. Because of its capacity to maintain an unique 3D form, offer physical stability for the cells in produced tissues, and replicate the native tissues, hydrogels have been utilized as one of the most frequent tissue engineering scaffolds during the last twenty years. Hydrogels’ high water content can provide an excellent conditions for cell viability as well as an architecture that mimics real tissues, bone, and cartilage. Hydrogels have been used to enable cell immobilization and growth factor application. This paper summarizes the features, structure, synthesis and production methods, uses, new challenges, and future prospects of bioactive polymeric hydrogels in dental and osseous tissue engineering of clinical, exploring, systematical and scientific applications.