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Colloid Chemical Approach for Fabricating Cu–Fe–S Nanobulk Thermoelectric Materials by Blending Cu2S and FeS Nanoparticles as Building Blocks
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-25 , DOI: 10.1021/acs.iecr.8b05569 Maninder Singh , Pratibha Dwivedi , Derrick Mott , Koichi Higashimine , Michihiro Ohta 1 , Hiroshi Miwa 2 , Takeo Akatsuka 2 , Shinya Maenosono
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-25 , DOI: 10.1021/acs.iecr.8b05569 Maninder Singh , Pratibha Dwivedi , Derrick Mott , Koichi Higashimine , Michihiro Ohta 1 , Hiroshi Miwa 2 , Takeo Akatsuka 2 , Shinya Maenosono
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The Cu–Fe–S system consists of earth-abundant low-toxicity elements, and it potentially has good thermoelectric properties. There are many different types of Cu–Fe–S compounds, and some are n-type semiconductors while others are p-type semiconductors. Here, we report a rapid low-cost colloid-chemical method to fabricate Cu–Fe–S thermoelectric materials using Cu2S and FeS nanoparticles as building blocks. The n- and p-type of the Cu–Fe–S nanobulk material can be readily tuned by changing the Cu2S/FeS volume ratio. The nanobulk materials lead to low lattice thermal conductivity ranging from 0.3 to 1.0 W m–1 K–1. By blending Cu2S and FeS nanoparticles at a weight fraction of 9:1, we fabricated a nanocomposite consisting of bornite Cu5FeS4 as the main phase and other minor phases. This nanocomposite has a maximum dimensionless figure of merit (ZT) of 0.55 at 663 K, which is 45% higher than that of pristine Cu5FeS4.
中文翻译：
通过将Cu 2 S和FeS纳米粒子作为构建基块进行混合来制备Cu–Fe–S纳米本体热电材料的胶体化学方法
Cu-Fe-S系统由富含地球的低毒元素组成，并且潜在地具有良好的热电特性。Cu-Fe-S化合物的类型很多，有些是n型半导体，而有些是p型半导体。在这里，我们报告了一种快速低成本的胶体化学方法，该方法以Cu 2 S和FeS纳米粒子为基础来制造Cu-Fe-S热电材料。通过更改Cu 2 S / FeS体积比，可以轻松地调整Cu-Fe-S纳米本体材料的n型和p型。纳米体材料导致晶格导热率低，范围从0.3到1.0 W m –1 K –1。通过混合Cu 2S和FeS纳米粒子的重量比为9：1，我们制造了一种纳米复合材料，该复合材料由斑铁矿Cu 5 FeS 4作为主要相和其他次要相组成。该纳米复合材料在663 K时的最大无量纲品质因数（ZT）为0.55，比原始Cu 5 FeS 4高45％。
更新日期：2019-02-25
中文翻译：
通过将Cu 2 S和FeS纳米粒子作为构建基块进行混合来制备Cu–Fe–S纳米本体热电材料的胶体化学方法
Cu-Fe-S系统由富含地球的低毒元素组成，并且潜在地具有良好的热电特性。Cu-Fe-S化合物的类型很多，有些是n型半导体，而有些是p型半导体。在这里，我们报告了一种快速低成本的胶体化学方法，该方法以Cu 2 S和FeS纳米粒子为基础来制造Cu-Fe-S热电材料。通过更改Cu 2 S / FeS体积比，可以轻松地调整Cu-Fe-S纳米本体材料的n型和p型。纳米体材料导致晶格导热率低，范围从0.3到1.0 W m –1 K –1。通过混合Cu 2S和FeS纳米粒子的重量比为9：1，我们制造了一种纳米复合材料，该复合材料由斑铁矿Cu 5 FeS 4作为主要相和其他次要相组成。该纳米复合材料在663 K时的最大无量纲品质因数（ZT）为0.55，比原始Cu 5 FeS 4高45％。
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