新型反应条件诱导的Bi2S3-Bi纳米复合材料的增强的热电性能。,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

新型反应条件诱导的Bi2S3-Bi纳米复合材料的增强的热电性能。
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-07-24 , DOI: 10.1021/acsami.0c10774
Tarachand,Gunadhor Singh Okram,Binoy Krishna De,Siddhartha Dam,Shamima Hussain,Vasant Sathe,Uday Deshpande,Archana Lakhani,Yung-Kang Kuo

这是关于使用简便的一步多元醇方法合成的新型反应温度（T _Re）和持续时间诱导的Bi ₂ S ₃ -Bi纳米复合材料增强的热电（TE）性能的第一份报告。它们被很好地表征为正交晶体Bi ₂ S ₃和菱形Bi相的纳米棒复合物，其中后者包覆前者形成Bi ₂ S ₃ -Bi核-壳状结构以及独立的Bi纳米颗粒。一个非常重要的发现是电阻率ρ有系统地降低，幅度高达7个数量级（〜10 ⁷）随反应温度的升高和持续时间的增加，揭示了一种降低这种高电阻硫属化物的ρ值的有前途的方法，从而解决了过去几十年来其热电应用潜力的早期障碍。最令人惊讶的是，最高Bi含量的纳米复合材料颗粒在300 K时的TE功率因数（在27°C下使用约900 MPa的压力制得）比热压的Bi ₂ S _{3高3个数量级}。在325 K为0.006时的最高ZT值是类似制备的CuS或Ag _2的两倍基于S的纳米复合材料。这些无毒和不含稀土元素的TE纳米复合材料的TE性能潜力在300 K附近得到了显着提高，从而使本合成方法成为开发Bi ₂ S ₃基材料增强的热电性能的开创性方法。烧结步骤。

"点击查看英文标题和摘要"

Enhanced Thermoelectric Performance of Novel Reaction Condition-Induced Bi2S3-Bi Nanocomposites.

This is the first report on the enhanced thermoelectric (TE) properties of novel reaction-temperature (T_Re) and duration-induced Bi₂S₃-Bi nanocomposites synthesized using a facile one-step polyol method. They are well characterized as nanorod composites of orthorhombic Bi₂S₃ and rhombohedral Bi phases in which the latter coats the former forming Bi₂S₃-Bi core–shell-like structures along with independent Bi nanoparticles. A very significant observation is the systematic reduction in electrical resistivity ρ with a whopping 7 orders of magnitude (∼10⁷) with just reaction temperature and duration increase, revealing a promising approach for the reduction of ρ of this highly resistive chalcogenide and hence resolving the earlier obstacles for its thermoelectric application potentials in the past few decades. Most astonishingly, a TE power factor at 300 K of the highest Bi content nanocomposite pellet, made at 27 °C using ∼900 MPa pressure, is 3 orders of magnitude greater than that of hot-pressed Bi₂S₃. Its highest ZT at 325 K of 0.006 is over twice of that of similarly prepared CuS or Ag₂S-based nanocomposites. A significantly improved TE performance potential near 300 K is demonstrated for these toxic-free and rare-earth element-free TE nanocomposites, making the present synthesis method as a pioneering approach for developing enhanced thermoelectric properties of Bi₂S₃-based materials without extra sintering steps.

更新日期：2020-08-19

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南