项目来源

国家自然科学基金(NSFC)

项目主持人

徐君莉

项目受资助机构

东北大学

项目编号

51574071

立项年度

2015

立项时间

未公开

项目级别

国家级

研究期限

未知 / 未知

受资助金额

65.00万元

学科

工程与材料科学-矿业与冶金工程-有色金属冶金

学科代码

E-E04-E0412

基金类别

面上项目

关键词

离子液体 ; 熔盐电解 ; 电极行为 ; 太阳能级硅 ; molten salts electrolysis ; ionic liquids ; solar grade silicon ; electrode behavior

参与者

张霞；韩义德；王育红；李亮星；何文才；王威；公维英；刘振昊

参与机构

江西理工大学；昆明学院

项目标书摘要：基于大幅降低太阳能电池成本的目的，用SiO2为原料在离子液体中电沉积制备太阳能级硅薄膜。研究SiO2在离子液体中的溶解行为，建立溶解度与温度、组成关系的数学模型，用光谱技术研究硅在离子液体中的离子结构，阐明SiO2溶解过程的物理化学问题；采用电化学石英微晶天平、扫描电化学显微镜及循环伏安和电化学交流阻抗谱技术，揭示电极过程的质能转化及耗散规律，探明电极反应的扩散传质、结晶成核及吸/脱附等动力学问题；通过电化学原位及共振拉曼光谱和卷积伏安法，原位检测电极反应中电解质本体、电极近液层、电极界面上的离子结构和印迹，获得反应离子经由中间体到产物的转化迁移规律，从电子、离子、分子等微观层面分析、表征离子与电子键合的构型及取向，推演阴极电沉积硅薄膜和阳极析氧反应历程和机理，解析整个过程相关物理化学问题，为低成本制备太阳能级硅和在离子液体中氧化物的电化学冶金提供理论指导。

Application Abstract: Based on the purpose of reducing the fabrication cost of solar grade silicon,high purity silicon oxide is chosen as raw material to produce solar grade silicon thin films by electrodeposition in ionic liquids.By measuring the dissolution behavior of SiO2 in the ionic liquids,the solubility which functions with temperature and the composition of the electrolyte are modeled.The ionic structures of silicon in ionic liquids are investigated using Spectrum methods,and the related physicochemical issues of SiO2 dissolution behaviors in ionic liquids are described.The diffusion and mass transfer,crystallization and nucleation of the electrochemical reactive species on both cathode and anode electrodes are investigated using the techniques of cyclic voltammetry,electrochemical impedance spectroscopy,electrochemical quartz crystal microbalance and scanning electrochemistry microscope.Meanwhile,the transfer and dissapation between the energy and mass in the system are concluded.The ionic structure of electrolyte located in several positions including the center of electrolyte,the vicinity of electrode,the interface between electrode and electrolyte,and the surface of electrode,are monitored and detected using electrochemical in-situ Raman spectroscopy,Resonance Raman spectoscopy and Convolution voltammetry techniques.The mechanism of conversion and transference process of the reactive species ions which converses starting from initial state to intermediate state,and to final product,are analyzed in the level of electron,ion and molecular according to the coupling orientation and style between the electrons and ions,which is used to describe and illustrate the mechanism and behaviors of silicon electro-deposition and oxygen absorption,desorption and evolution on anode surface.A completely explanation and description of the physicochemical issue on the whole process is anticipated.It will be used as a principle and practice guidance to produce solar grade silicon using silica as a solute and extract metal from ionic liquids using oxide as a solute.

项目受资助省

辽宁省

项目结题报告

氟化咪唑基离子液体体系电沉积制备太阳能级硅薄膜结题报告(全文)