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Physical exfoliation of graphene and molybdenum disulfide sheets using conductive polyaniline: an efficient route for synthesizing unique, random-layered 3D ternary electrode materials†
New Journal of Chemistry ( IF 3.3 ) Pub Date : 2018-09-24 00:00:00 , DOI: 10.1039/c8nj03762k
Seonmyeong Noh 1, 2, 3, 4, 5 , Thanh-Hai Le 3, 4, 5, 6, 7 , Chul Soon Park 3, 4, 5, 6, 7 , Saerona Kim 3, 4, 5, 6, 7 , Yukyung Kim 3, 4, 5, 6, 7 , Jong-Jin Park 1, 2, 3, 4, 5 , Hyeonseok Yoon 1, 2, 3, 4, 5
Affiliation  

Vertically random-layered three-dimensional ternary nanohybrids were synthesized by combining graphene, molybdenum disulfide (MoS2), and polyaniline (PANI) via a simple physical exfoliation process. During this process, PANI penetrates the interlayers of bulk MoS2 without the requirement for any additional chemical treatment, effectively dispersing MoS2 layers in the liquid phase. In addition, graphene, with several functional groups on its surface, and PANI convert the semiconducting trigonal prismatic phase of MoS2 to a metallic octahedrally coordinated phase, thereby enhancing the electrical conductivity. Moreover, the obtained nanohybrid has an open porous structure that facilitates electrolyte-mediated ion and charge transfer, which increases the effective surface area for electrochemical reactions and charge storage. The effect of different graphene, MoS2, and PANI contents on the electrical/electrochemical properties of the nanohybrids was investigated, and the optimal composition for the use of the nanohybrid as an electrode material was determined. Notably, the nanohybrid with a nominal graphene/MoS2/PANI weight ratio of 1 : 1 : 80 exhibited excellent electrochemical properties, exemplified by the prominent redox reaction, low charge transfer resistance, and high specific capacitance. Flexible all-solid-state capacitor cells employing the nanohybrid achieved a maximum capacitance of 162 F g−1, good flexibility, and good long-term cycling stability in two different electrolytes, i.e., acidic and neutral solution.

中文翻译:

使用导电聚苯胺对石墨烯和二硫化钼片进行物理剥落:合成独特的,随机分层的3D三元电极材料的有效途径

通过简单的物理剥离过程,将石墨烯,二硫化钼(MoS 2)和聚苯胺(PANI)结合起来,合成了垂直随机分层的三维三元纳米杂化物。在此过程中,PANI渗透了块状MoS 2的中间层,而无需进行任何其他化学处理,从而有效地将MoS 2层分散在液相中。此外,石墨烯表面具有多个官能团,并且PANI可以转换MoS 2的半导体三角棱柱相到金属八面体配位相,从而提高了电导率。此外,所获得的纳米杂化物具有开放的多孔结构,该结构促进了电解质介导的离子和电荷的转移,这增加了用于电化学反应和电荷存储的有效表面积。研究了不同石墨烯,MoS 2和PANI含量对纳米杂化物的电/电化学性质的影响,并确定了将纳米杂化物用作电极材料的最佳组成。值得注意的是,具有标称石墨烯/ MoS 2的纳米杂化物/ PANI重量比为1:1:80表现出出色的电化学性能,突出的氧化还原反应,低的电荷转移电阻和高的比电容就是例证。在两种不同的电解质(酸性和中性溶液)中,采用纳米杂化的柔性全固态电容器电池实现了162 F g -1的最大电容,良好的柔韧性和良好的长期循环稳定性。
更新日期:2018-09-24
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