Electrochemically stable carbazole-derived polyaniline for pseudocapacitors was written by Almtiri, Mohammed;Dowell, Timothy J.;Giri, Hari;Wipf, David O.;Scott, Colleen N.. And the article was included in ACS Applied Polymer Materials in 2022.HPLC of Formula: 128-08-5 This article mentions the following:
Supercapacitor energy storage devices are well suited to meet the rigorous demands of future portable consumer electronics (PCEs) due to their high energy and power densities (i.e., longer battery-life and rapid charging, resp.) and superior operational lifetimes (10 times greater than lithium-ion batteries). To date, research efforts have been narrowly focused on improving the specific capacitance of these materials; however, emerging technologies are increasingly demanding competitive performance with regards to other criteria, including scalability of fabrication and electrochem. stability. In this regard, we developed a polyaniline (PANI) derivative that contains a carbazole unit copolymerized with 2,5-dimethyl-p-phenylenediamine (Cbz-PANI-1) and determined its optoelectronic properties, elec. conductivity, processability, and electrochem. stability. Importantly, the polymer exhibits good solubility in various solvents, which enables the use of scalable spray-coating and drop-casting methods to fabricate electrodes. Cbz-PANI-1 was used to fabricate electrodes for supercapacitor devices that exhibits a maximum areal capacitance of 64.8 mF cm-2 and specific capacitance of 319 F g-1 at a c.d. of 0.2 mA cm-2. Moreover, the electrode demonstrates excellent cyclic stability (閳?83% of capacitance retention) over 1000 CV cycles. Addnl., we demonstrate the charge storage performance of Cbz-PANI-1 in a sym. supercapacitor device, which also exhibits excellent cyclic stability (閳?91% of capacitance retention) over 1000 charge-discharge cycles. In the experiment, the researchers used many compounds, for example, 1-Bromopyrrolidine-2,5-dione (cas: 128-08-5HPLC of Formula: 128-08-5).
1-Bromopyrrolidine-2,5-dione (cas: 128-08-5) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon鑱砨romine bond is electrophilic in nature. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.HPLC of Formula: 128-08-5
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary