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ZnO/carbon hybrids derived from polymer nanocomposite precursor materials for pseudocapacitor electrodes with high cycling stability
Polymer ( IF 4.6 ) Pub Date : 2018-01-09 , DOI: 10.1016/j.polymer.2018.01.024
Yepin Zhao , Zongyu Wang , Rui Yuan , Yu Lin , Jiajun Yan , Jianan Zhang , Zhao Lu , Danli Luo , Joanna Pietrasik , Michael R. Bockstaller , Krzysztof Matyjaszewski

A facile new route for fabricating carbon/zinc oxide (carbon/ZnO) hybrid materials suitable for pseudocapacitor electrodes with high cycling stability is presented. The synthesis of carbon/ZnO nanocomposites involved the uniform dispersion of octylamine (OA) capped ZnO nanocrystals into poly(styrene-r-acrylonitrile) (PSAN) copolymers and the subsequent pyrolysis of the nanocomposite precursor material to form the carbon/ZnO hybrid. PSAN copolymers with two different chain lengths were prepared to illustrate the effect of chain length on structure and properties of the composites. For all cases, the pyrolysis of ZnO-OA/PSAN precursor blends resulted in the formation of disperse ZnO/carbon core-shell hybrid structures. The accessible surface area was found to increase with molecular weight of matrix chains. The ZnO/carbon composites exhibited a specific capacitance of 145 F g−1 at the scan rate of 2 mV s−1. In addition, 91% of the initial capacitance was obtained after 10,000 charge/discharge cycles. The versatility of the synthetic process should render the presented method attractive for the fabrication of a wide range of carbon/transition metal oxide hybrid materials.



中文翻译:

源自聚合物纳米复合材料前驱体材料的ZnO /碳杂化物,用于具有高循环稳定性的伪电容器电极

提出了一种适用于具有高循环稳定性的,适用于伪电容器电极的碳/氧化锌(碳/氧化锌)混合材料的简便新路线。碳/ ZnO纳米复合材料的合成涉及将辛胺(OA)封端的ZnO纳米晶体均匀分散到聚(苯乙烯-r-丙烯腈(PSAN)共聚物,然后对纳米复合材料前驱体材料进行热解,以形成碳/ ZnO杂化物。制备了具有两种不同链长的PSAN共聚物,以说明链长对复合材料结构和性能的影响。对于所有情况,ZnO-OA / PSAN前体混合物的热解导致形成分散的ZnO /碳核-壳杂化结构。发现可及表面积随基质链的分子量增加而增加。在ZnO /碳复合材料表现出的145架F g的比电容-1以2毫伏S中的扫描速率-1。另外,在10,000次充电/放电循环后,获得了91%的初始电容。合成方法的多功能性应使所提出的方法对制造多种碳/过渡金属氧化物杂化材料具有吸引力。

更新日期:2018-01-09
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