Ternary molybdenum sulfoselenide based hybrid nanotubes boost potassium-ion diffusion kinetics for high energy/power hybrid capacitors,Journal of Materials Chemistry A

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Ternary molybdenum sulfoselenide based hybrid nanotubes boost potassium-ion diffusion kinetics for high energy/power hybrid capacitors
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-30 , DOI: 10.1039/d0ta01786h
Jingyu Gao _{1,

2,

3,

4,

5} , Gongrui Wang _{1,

2,

3,

4,

5} , Yi Liu _{1,

2,

3,

4,

5} , Jie Li _{1,

2,

3,

4,

5} , Bo Peng _{1,

2,

3,

4,

5} , Shuhong Jiao _{1,

2,

3,

4,

5} , Suyuan Zeng _{6,

7,

8,

9} , Genqiang Zhang _{1,

2,

3,

4,

5}

Affiliation

Ternary MoS_2−xSe_x/carbon hybrid nanotubes (denoted as MoS_2−xSe_x/C-HNTs) with a unique disordered layer structure and expanded interplanar spacing were synthesized through a facile two-step method involving oxidative polymerization coating and subsequent thermal annealing treatment using an Sb₂S₃ nanowire template, and they delivered excellent K⁺ storage performance. The higher diffusion coefficient, excellent structural robustness and disordered layer structure could be the possible reasons for the enhanced performance with a high capacity of 237.0 mA h g⁻¹ after 300 cycles at 0.5 A g⁻¹, which is supported by ex situ XRD, Raman spectroscopy and GITT measurements. Importantly, the prominent performance of a potassium-ion hybrid capacitor (KIHC) based on the MoS_2/3Se_4/3/C-HNT anode and a commercial activated carbon (AC) cathode demonstrates its great potential for future practical applications.

中文翻译：

基于三硫化钼硒化物的混合纳米管提高了高能量/功率混合电容器的钾离子扩散动力学

通过一种简便的包括氧化聚合涂层和随后的两步法合成具有独特无序层结构和扩大的晶面间距的三元MoS _{2- x} Se _x /碳杂化纳米管（表示为MoS _{2- x} Se _x / C-HNTs）使用Sb ₂ S ₃纳米线模板进行热退火处理，它们提供了出色的K ⁺存储性能。较高的扩散系数，出色的结构坚固性和无序层结构可能是在0.5 A g ^-1的300次循环后以237.0 mA hg ^-1的高容量增强性能的可能原因，这由异位XRD，拉曼光谱和GITT测量支持。重要的是，基于MoS _2/3 Se _4/3 / C-HNT阳极的钾离子混合电容器（KIHC）和商用活性炭（AC）阴极的出色性能证明了其在未来实际应用中的巨大潜力。

更新日期：2020-07-21

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