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Morphology formation mechanism and electrochemical performance of poly(o-phenylenediamine) based electrode materials
Synthetic Metals ( IF 4.0 ) Pub Date : 2021-01-17 , DOI: 10.1016/j.synthmet.2020.116688
Haidie Lan , Arzugul Muslim , Mehriban Hojiahmat , Lin Wang , Yu Meng , Qing Zhong

Polystyrene-b-poly(acrylic acid) (PS57-b-PAA54) is prepared by the Atom Transfer Radical Polymerization (ATRP), and poly(o-phenylenediamine) (PoPD) and its carbon dots composites (CDs/PoPD) are synthesized by using the self-assembled micelles of PS57-b-PAA54 as template. Rod-shaped PoPD and CDs/PoPD particles are formed with the average diameters of 263 nm and 322 nm, respectively. The PoPD exhibit a wide size distribution and diverse morphologies, while the CDs/PoPD is mostly composed of olive-shaped particles with a narrow size distribution. The PS57-b-PAA54 induced morphological formation mechanism of PoPD and CDs/PoPD is then proposed. The electrochemical performances test characterized by cyclic voltammetry, chronopotential, AC impedance and constant current charge-discharge tests in a three-electrode system reveals that the initial specific discharge capacitances of CDs/PoPD and PoPD can reach up to 1316 F·g−1 and 216 F·g−1, respectively, at the current density of 1 A·g−1. CDs/PoPD shows better cycle stability with the specific discharge capacitance of 830 F·g−1 for the first cycle, and the decline to 357 F·g−1 in 2000 cycles at the current density of 1 A·g−1 within the potential window of −0.2–1.4 V.



中文翻译:

苯二胺基电极材料的形貌形成机理与电化学性能

聚苯乙烯-b-聚丙烯酸(PS 57 - b -PAA 54)是通过原子转移自由基聚合(ATRP)和聚(苯二胺)(P o PD)及其碳点复合物(CDs / P ø PD)通过使用PS的自组装胶束合成57 - b -PAA 54作为模板。形成棒状的P o PD和CDs / P o PD颗粒,其平均直径分别为263 nm和322 nm。P o PD表现出较大的尺寸分布和多种形态,而CD / P oPD主要由粒径分布较窄的橄榄形颗粒组成。然后提出了PS 57 - b -PAA 54诱导的P o PD和CDs / P o PD的形态形成机制。在三电极系统中通过循环伏安法,时序电势,交流阻抗和恒流充放电测试表征的电化学性能测试表明,CDs / P o PD和P o PD的初始比放电电容可以达到1316 F·。克-1和216·F·克-1,分别在1个A的电流密度·克-1。光盘/ P ØPD显示出更好的循环稳定性,第一个循环的比放电电容为830 F·g -1,在电势窗口内电流密度为1 A·g -1的情况下,在2000个循环中下降到357 F·g -1为-0.2–1.4V。

更新日期:2021-01-18
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