石墨烯复合 beta-Zn4Sb3材料的热电性质

doi:10.12066/j.issn.1007-2861.2011

上海大学学报(自然科学版) ›› 2020, Vol. 26 ›› Issue (1): 95-101.doi: 10.12066/j.issn.1007-2861.2011

石墨烯复合 beta-Zn₄Sb₃材料的热电性质

刘风采, 高鹏飞, 孟庆飞, 秦娟(), 史伟民, 王林军

上海大学材料科学与工程学院, 上海 200444

收稿日期:2018-02-02 出版日期:2020-02-28 发布日期:2020-03-22
通讯作者: 秦娟 E-mail:juan_qin@staff.shu.edu.cn
基金资助:
国家自然科学基金资助项目(11374228)

Investigation on the thermoelectric properties of beta -Zn₄Sb₃ graphene composites

Fengcai LIU, Pengfei GAO, Qingfei MENG, Juan QIN(), Weimin SHI, Linjun WANG

School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China

Received:2018-02-02 Online:2020-02-28 Published:2020-03-22
Contact: Juan QIN E-mail:juan_qin@staff.shu.edu.cn

摘要/Abstract

摘要：

将不同比例的石墨烯粉末和beta-Zn₄Sb₃ 粉末混合, 通过热压法制备出复合材料样品, 并对其结构和热电性质进行检测.X 射线衍射结果表明,样品的主要成分仍然是 beta -Zn₄Sb₃ 相, 晶粒尺寸随石墨烯浓度的增加略有减小.这说明石墨烯浓度在 5.0% 以内时对样品的物相形成没有明显影响.另外, 复合石墨烯后样品的 Seebeck 系数变化不大,但电导率降低、热导率略有增大, 从而使热电优值有所降低,主要是由于石墨烯的掺入在样品中引入了电子补偿效应,使原来受主能级上的空穴减少, 进而降低了样品中的载流子浓度,同时也改变了 beta -Zn₄Sb₃ 中 Zn 原子无序结构.

关键词: beta -Zn₄Sb₃, 石墨烯, 热电复合材料

Abstract:

beta-Zn₄Sb₃/graphene composite material was prepared by mixing graphene powder and beta -Zn₄Sb₃ powder through hot pressing, and its structure and thermoelectric properties were checked. The results of X-ray diffraction show that the main component of the composite samples is still beta -Zn₄Sb₃ phase,and that the average grain size decreases slightly with the increase of graphene concentration, indicating that there is no significant effect on the phase formation of the composite sample when the graphene concentration is within 5.0%. In addition, the Seebeck coefficient of the composites containing graphene varies only slightly, but the electrical conductivity decreases and the thermal conductivity increases, which contributes to the lowering of the ZT value. The main reason might be the reduction of hole concentration due to the electron compensation effect accompanied by the incorporation of graphene, thereby reducing the sample carrier concentration, and the changes to the Zn atom disorder of beta -Zn₄Sb₃ as well.

Key words: beta -Zn₄Sb₃, graphene, thermoelectric composite material

中图分类号:

TB33

刘风采, 高鹏飞, 孟庆飞, 秦娟, 史伟民, 王林军. 石墨烯复合 beta-Zn₄Sb₃材料的热电性质[J]. 上海大学学报(自然科学版), 2020, 26(1): 95-101.

Fengcai LIU, Pengfei GAO, Qingfei MENG, Juan QIN, Weimin SHI, Linjun WANG. Investigation on the thermoelectric properties of beta -Zn₄Sb₃ graphene composites[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(1): 95-101.

图/表 4

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石墨烯复合 beta-Zn₄Sb₃材料的热电性质

Investigation on the thermoelectric properties of beta -Zn₄Sb₃ graphene composites

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