02546nas a2200217   4500008004100000022001400041245018000055210006900235260000800304300001600312490000800328520169900336100002702035700001902062700004002081700002302121700001902144700002402163700001702187856012402204       2024                        eng d  a1932-744700aHigh-voltage symmetric supercapacitor electrodes via in situ synthesized multiwalled carbon nanotube-doped perylenebisimide-based donor-acceptor conjugate polymer P(PDI2OD-T2)0 aHighvoltage symmetric supercapacitor electrodes via in situ synt  cJUL  a12808-128210 v1283 a<p>
	This study presents the design and synthesis of a donor-acceptor pi-conjugated polymer composite P(PDI2OD-T2)/MWCNT tailored for high-voltage symmetric supercapacitor applications. The synthesis of P(PDI2OD-T2)/MWCNT was expedited by adopting a novel in situ polymerization technique that modifies the traditional Stille polymerization process. Incorporating approximately 33% by weight of multiwalled carbon nanotubes (MWCNT) into the polymer matrix, referred to as P-2, significantly enhances its conductivity, surface area, and porosity. These improvements in the material properties contribute to the superior electrochemical performance of the composites by promoting efficient electrolyte ion transport across the electrode-electrolyte interfaces. The symmetric supercapacitor devices fabricated with P-2 electrodes employing both liquid organic (LE-P-2||P-2) and quasi-solid-state gel (QSS- P-2||P-2) electrolytes demonstrate capacitance values of 85.4 and 84.2 F g(-1), respectively, at a current density of 0.25 A g(-1), while operating at a high-voltage window of 3.1 V. Moreover, these devices exhibit robust cycling stability, maintaining approximately 70% of their initial capacitance over 45,000 cycles with a coulombic efficiency of 96%. The successful demonstration of a quasi-solid-state symmetric supercapacitor underscores the potential of flexible energy storage solutions, as evidenced by a PMMA LiClO4 gel electrolyte prototype. This flexible device not only maintains structural integrity but also achieves an impressive power density of 18,600 W kg(-1) and an energy density of 112.4 Wh kg(-1), indicating its practical viability for real-world applications.</p>
1 aWavhal, Aryan, Anurath1 aDilwale, Swati1 aPuthiyaveetil, Priyanka, Pandinhare1 aKakde, Navnath, R.1 aPrakash, Medha1 aKurungot, Sreekumar1 aAsha, S., K.  uhttps://library.ncl.res.in/content/high-voltage-symmetric-supercapacitor-electrodes-situ-synthesized-multiwalled-carbon