Effect of Functional Groups on the Thermoelectric Performance of Carbon Nanotubes
Effect of Functional Groups on the Thermoelectric Performance of Carbon Nanotubes
复制标题
官能团对碳纳米管热电性能的影响
DOI：
10.1007/s11664-019-07519-6
复制
发表时间：
2019-11
影响因子：
2.1
通讯作者：
Jiang Fengxing
中科院分区：
文献类型：
--
作者：
Lan Xiaoqi;Liu Congcong;Wang Tongzhou;Hou Jian;Xu Jingkun;Tan Rongri;Nie Guangming;Jiang Fengxing
单壁碳纳米管(SWCNTs)由于其优异的电学和力学性能，在过去的十年里受到了人们的广泛关注。单个碳纳米管(CNT)中载流子的量子限制效应、灵活的拓扑结构和高的抗拉强度使其成为潜在的候选热电(TE)材料。然而，单壁碳纳米管的低Seebeck系数和高导热系数限制了其进一步发展成为性能优良的TE材料。虽然通过掺杂和复合来改善单壁碳纳米管的TE性能已有很多工作，但对单壁碳纳米管中官能团的研究还很少。在这项工作中，我们详细地研究了不同官能团(羟基、羧基和氨基)的SWCNT薄膜的TE性能。结果表明，随着电导率的降低，不同官能团的单壁碳纳米管的塞贝克系数有明显的提高。对于羟基与纯碳纳米管相当的单壁碳纳米管，其最佳功率因数为47.8μW/m−1K−2。值得注意的是，官能团的引入导致热导率显著降低，并提高了TE品质因数(ZT)。这项工作为优化单壁碳纳米管的TE性能提供了一种替代策略。
Single-wall carbon nanotubes (SWCNTs) have received much attention in the past decade due to their excellent electric and mechanical properties. The quantum confinement effect of charge carriers in an individual carbon nanotube (CNT), together with the flexible topology and high tensile strength, make it a potential candidate thermoelectric (TE) material. However, the low Seebeck coefficient and high thermal conductivity of SWCNTs limits further development for a good TE material with high performance. Although many efforts have been focused on the improvement of TE performance for SWCNTs by doping and composites, few works have been devoted to investigation of functional groups in SWCNTs. In this work, we investigated the TE performance of SWCNT films in detail with different functional groups (hydroxyl, carboxyl, and amino). It is found that the Seebeck coefficient of SWCNTs with different functional groups have an obvious improvement with the decrease in electrical conductivity. An optimal power factor of 47.8μW m−1K−2was obtained for SWCNTs with a hydroxyl group comparable to pure SWCNTs. Significantly, the introduction of functional groups results in a marked reduction in thermal conductivity and an enhanced TE figure of merit (ZT). This work provides an alternative strategy to optimize the TE performance of SWCNTs.
登录
查看更多内容
影响因子：
4.6
作者：
Nonoguchi Y;Ohashi K;Kanazawa R;Ashiba K;Hata K;Nakagawa T;Adachi C;Tanase T;Kawai T
通讯作者：
Kawai T
影响因子：
17.1
作者：
Yu, Choongho;Choi, Kyungwho;Grunlan, Jaime C.
通讯作者：
Grunlan, Jaime C.
影响因子：
6.7
作者：
Gang Zhang;Baowen Li
通讯作者：
Gang Zhang;Baowen Li
影响因子：
3.7
作者：
Hone, J;Whitney, M;Zettl, A
通讯作者：
Zettl, A
利用碳纳米管网络增强热电性能的一种有前途的方法
影响因子：
29.4
作者：
Meng, Chuizhou;Liu, Changhong;Fan, Shoushan
通讯作者：
Fan, Shoushan