锚定在氧化石墨烯纳米片上的剥离 MoS2 可增强单壁碳纳米管的热电特性

IF 5.1 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Yusheng Wang, Duo Jiang, Xiaoliang Ma, Yunfei Zhang, Ping Fu, Feipeng Du
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引用次数: 0

摘要

基于碳纳米管的热电材料具有高导电率(σ)和优异的机械性能,在柔性可穿戴设备中具有广阔的应用前景。二维过渡金属硫化物 MoS2 具有较高的塞贝克系数 (S),已被用于增强碳纳米管的热电特性。然而,MoS2 纳米片由于比表面积高而容易团聚,导致掺杂效率降低。本研究采用水热原位生长法将剥离的 MoS2 固定在氧化石墨烯(GO)纳米片上,成功制备了 MoS2@GO 混合物,MoS2@GO 混合物显著增强了 MoS2 与单壁碳纳米管(SWCNT)之间的界面相互作用,提高了载流子迁移率,从而同时提高了 S 值和σ。MoS2@GO/SWCNT 的最大 S 值为 42.3 ± 0.2 μV K-1,σ 为 1173.2 ± 45.6 S cm-1,室温下的最佳功率因数(PF)为 208.8 ± 8.5 μW m-1 K-2,达到 261.3 ± 10。为了进行应用示范,我们通过串联六对 p 型 MoS2@GO/SWCNT 和 n 型铜片组装了一个热电装置,其开路电压为 17.因此,该研究丰富了剥离 MoS2 的设计和合成策略,为开发基于 SWCNT 的高性能热电材料提供了一种新方法,在可穿戴电子产品领域具有重要的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exfoliated MoS2 anchored on graphene oxide nanosheets for enhancing thermoelectric properties of single-walled carbon nanotubes
Carbon nanotubes-based thermoelectric materials with high electrical conductivity (σ) and excellent mechanical properties have promising applications in flexible wearable devices. Two-dimensional transition metal sulfide MoS2 has been used to enhance the thermoelectric properties of carbon nanotubes due to its high Seebeck coefficient (S). However, MoS2 nanosheets are prone to agglomeration due to their high specific surface area, which causes lower doping efficiency. In this work, MoS2@GO hybrids are successfully fabricated using a hydrothermal in-situ growth method to anchor exfoliated MoS2 on graphene oxide (GO) nanosheets, and MoS2@GO hybrids significantly enhance the interfacial interaction between MoS2 and single-walled carbon nanotubes (SWCNT), improve the carrier mobility, lead to a simultaneous enhancement of the S and the σ. The maximum S value of MoS2@GO/SWCNT is 42.3 ± 0.2 μV K−1, the σ is 1173.2 ± 45.6 S cm−1, and an optimum power factor (PF) of 208.8 ± 8.5 μW m−1 K−2 is obtained at room temperature, which reaches 261.3 ± 10.2 μW m−1 K−2 at 385 K. For application demonstration, a thermoelectric device is assembled by connecting six pairs of p-type MoS2@GO/SWCNT and n-type copper sheets in series, which demonstrates an open-circuit voltage of 17.4 mV and an output power of 2.1 μW under a temperature difference of 50 K. Therefore, this study enriches the design and synthesis strategy of exfoliated MoS2 and provides a new approach for the development of high-performance SWCNT-based thermoelectric materials, which has important potential applications in the field of wearable electronics.
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
期刊介绍: Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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