In situ compression and X-ray computed tomography of flow battery electrodes

作     者：Rhodri Jervis Matt D.R.Kok Tobias P.Neville Quentin Meyer Leon D.Brown Francesco Iacoviello Jeff T.Gostick Dan J.L.Brett Paul R.Shearing 

作者机构：Electrochemical Innovation Lab Department of Chemical Engineering University College London Department of Chemical Engineering McGill University Porous Media Engineering and Analysis Lab Department of Chemical Engineering University of Waterloo 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2018年第27卷第5期

页      面：1353-1361页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：support from the EPSRC under grants EP/L014289/1 EP/N032888/1 and EP/M014045/1 the STFC Global Challenges Network in Batteries and Electrochemical Energy Devices under the grant ST/N002385/1 for facilitation of travel funding from the Royal Academy of Engineering 

主　　题：Redox flow battery X-ray computed tomography Compression Carbon felt RFB 

摘      要：Redox flow batteries offer a potential solution to an increase in renewable energy generation on the grid by offering long-term, large-scale storage and regulation of power. However, they are currently un- derutilised due to cost and performance issues, many of which are linked to the microstructure of the porous carbon electrodes used. Here, for the first time, we offer a detailed study of the in situ effects of compression on a commercially available carbon felt electrode. Visualisation of electrode structure us- ing X-ray computed tomography shows the non-linear way that these materials compress and various metrics are used to elucidate the changes in porosity, pore size distribution and tortuosity factor under compressions from 0%-90%.