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High Performance and Flexible Polyvinylpyrrolidone/Ag/Ag2Te Ternary Composite Film for Thermoelectric Power Generator
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-14 00:00:00 , DOI: 10.1021/acsami.9b11217 Qiufeng Meng 1, 2, 3 , Yang Qiu 4 , Kefeng Cai 1 , Yufei Ding 1 , Mengdi Wang 2, 5 , Hongting Pu 1 , Qin Yao 2 , Lidong Chen 2 , Jiaqing He 4
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-08-14 00:00:00 , DOI: 10.1021/acsami.9b11217 Qiufeng Meng 1, 2, 3 , Yang Qiu 4 , Kefeng Cai 1 , Yufei Ding 1 , Mengdi Wang 2, 5 , Hongting Pu 1 , Qin Yao 2 , Lidong Chen 2 , Jiaqing He 4
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In this work, polyvinylpyrrolidone (PVP) coated Ag-rich Ag2Te nanowires (NWs) were synthesized by a wet chemical method using PVP coated Te NWs as templates, and a flexible PVP/Ag/Ag2Te ternary composite film on a nylon membrane was prepared by vacuum assisted filtration, followed by heat treatment. TEM and STEM observations of the focused ion beam prepared sample reveal that the composite film shows a porous network-like structure and that the Ag and Ag2Te exist as nanoparticles and NWs, respectively, both bonded with PVP. The Ag nanoparticles are formed by separation of the Ag-rich Ag2Te NWs during the heat treatment. For the composite film starting from a Ag/Te initial molar ratio of 6:1, a high power factor of 216.5 μW/mK2 is achieved at 300 K, and it increases to 370.1 μW/mK2 at 393 K. Bending tests demonstrate excellent flexibility of the hybrid film. A thermoelectric (TE) prototype composed of five legs of the hybrid film is assembled, and a maximum output power of 469 nW is obtained at a temperature gradient of 39.6 K, corresponding to a maximum power density of 341 μW/cm2. This work provides an effective route to a composite film with high TE performance and excellent flexibility for wearable TE generators.
中文翻译：
高性能柔性热电发电机聚乙烯吡咯烷酮/ Ag / Ag 2三元复合膜
在这项工作中，通过湿化学方法，以涂有PVP的Te NWs为模板，并在尼龙上形成柔性的PVP / Ag / Ag 2 Te三元复合膜，合成了聚乙烯吡咯烷酮（PVP）涂覆的富含Ag的Ag 2 Te纳米线（NWs）。通过真空辅助过滤，然后进行热处理来制备膜。聚焦离子束制备样品的TEM和STEM观察表明，复合膜显示出多孔网络状结构，Ag和Ag 2 Te分别以纳米颗粒和NW的形式存在，均与PVP结合。Ag纳米颗粒是通过在热处理过程中分离富含Ag的Ag 2 Te NW而形成的。对于从6：1的Ag / Te初始摩尔比开始的复合膜，高功率因数为216.5μW/ mK2是在300K实现，并且它增加至370.1μW/ mK的2在393 K.弯曲试验表明所述混合膜的柔软性优异。组装了由五个分支的混合膜组成的热电（TE）原型，并且在39.6 K的温度梯度下获得了469 nW的最大输出功率，对应于341μW/ cm 2的最大功率密度。这项工作为可穿戴式TE发生器提供了一种具有高TE性能和出色柔韧性的复合膜的有效途径。
更新日期：2019-08-14
中文翻译：
高性能柔性热电发电机聚乙烯吡咯烷酮/ Ag / Ag 2三元复合膜
在这项工作中，通过湿化学方法，以涂有PVP的Te NWs为模板，并在尼龙上形成柔性的PVP / Ag / Ag 2 Te三元复合膜，合成了聚乙烯吡咯烷酮（PVP）涂覆的富含Ag的Ag 2 Te纳米线（NWs）。通过真空辅助过滤，然后进行热处理来制备膜。聚焦离子束制备样品的TEM和STEM观察表明，复合膜显示出多孔网络状结构，Ag和Ag 2 Te分别以纳米颗粒和NW的形式存在，均与PVP结合。Ag纳米颗粒是通过在热处理过程中分离富含Ag的Ag 2 Te NW而形成的。对于从6：1的Ag / Te初始摩尔比开始的复合膜，高功率因数为216.5μW/ mK2是在300K实现，并且它增加至370.1μW/ mK的2在393 K.弯曲试验表明所述混合膜的柔软性优异。组装了由五个分支的混合膜组成的热电（TE）原型，并且在39.6 K的温度梯度下获得了469 nW的最大输出功率，对应于341μW/ cm 2的最大功率密度。这项工作为可穿戴式TE发生器提供了一种具有高TE性能和出色柔韧性的复合膜的有效途径。
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