对p型Bi2Te3温差电材料的电沉积过程进行了研究,分析了添加剂对电沉积过程的影响.在此基础上,以孔径为50nm的阳极氧化铝多孔膜为模板,采用直流电沉积技术,在氧化铝多孔模板的纳米级微孔内电化学组装出了P型Bi2Te3纳米线阵列温差电材料.性能研究表明,P型Bi2Te3纳米线阵列的温差电性能远远超过具有相同组成的块状温差电材料。
he electrodeposition process of p-type Bi2Te3 thermoelectric materials in the solution containing
Bi+3 and HTeO2+1 was investigated. During the electrodeposition prosess, Bi+3 can promote the reduction of HTeO2+1. The addition
of glycerin in the electrodepositing solution can decrease the solving rate of alumina templates in the solution, but glycerin also decreases the
electrodeposition rate remarkably. The p-type Bi2Te3 thermoelectric materials with nanowire array structure were electrochemically assembled
into the nano-pores of the alumina template. The performance measurements show that the Seebeck coefficient α of the nanowire array is much
higher than that of the bulk thermoelectric materials with the same composition.
参考文献
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