SPR光谱复合方法在线检测全钒液流电池电解液

项目名称： SPR光谱复合方法在线检测全钒液流电池电解液

项目编号： No.61308119

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘乐

作者单位： 清华大学

项目金额： 26万元

中文摘要： 全钒液流电池（VRB）技术因其易规模化、寿命长、环境友好等优点成为最有前景的储能技术之一，但电解液的失衡问题限制了它的发展，亟需一种在线检测电解液价态和浓度的技术。然而，现有的开路电压法、电位滴定法、色谱法、分光光度计法等均不适合在线检测VRB电解液。本课题中提出结合表面等离子体共振（SPR）技术和光谱技术的复合型光学检测方法：(1) SPR：基于SPR这种高灵敏的光学检测手段，建立一种适合在线检测VRB电解液的大动态范围、多通道、高分辨率、高金属膜适应性的新型SPR检测技术。（2）透射光谱法：针对VRB电解液吸收系数大，组分之间存在干扰的难题，用透射光谱代替吸收光谱作为检测结果来提高信噪比，使用整个光谱而不是单一波长的数据来进行电解液的区分。将这两种各有优势的方法结合起来，能够多通道、多参数、高分辨率地在线检测VRB电解液，不仅有利于监控VRB失衡状况，还为反应动力学研究提供工具。

中文关键词： 全钒液流电池；在线检测；表面等离子体共振；光谱；

英文摘要： Vanadium redox flow battery (VRB) technique is one of the most promissing energy storage techniques due to its benefits of large-scale, long life and environmentally friendly. However, the imbalance of the electrolytes restricts the development of the VRB, and hence an online detection techniuqe is demanded to monitor the valences and concentrations of the electrolytes. Nevertheless, none of the existing techniques is capable of online detection of the VRB electrolytes, including open circuit voltage (OCV), potentiometric titration, chromatography and spectrophotometry. In this study, a complex novel optical detection method based on SPR and spectroscopy is proposed: (1) The surface plasmon resonance (SPR) method: A new optical tecnique is developed with high dynamic range, multiple channels, high resolution and high metal film tolerance, which is suitable for online detection of VRB electrolytes, based on the sensitive optical detection technique of SPR. (2) The transmittance spectral method: In order to solve the problems of high absorptance and interference between components, the transmitttance spectrum is used as the detection result instead of the absorptance spectrum to increase the signal to noise ratio (SNR), also the whole data of a spectrum is used instead of one data at certain wavelength to distingu

英文关键词： vanadium redox flow battery；online detection；surface plasmon resonance；spectral；