BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Talks.cam//talks.cam.ac.uk// X-WR-CALNAME:Talks.cam BEGIN:VEVENT SUMMARY:Correlative Imaging of Electrochemical Devices Over Multiple Time and Length Scales - Dr Paul Shearing\, Reader in Chemical Engineering & \; Materials\, UCL DTSTART:20180511T130000Z DTEND:20180511T140000Z UID:TALK104053@talks.cam.ac.uk CONTACT:Hilde Hambro DESCRIPTION:Correlative Imaging of Electrochemical Devices Over Multiple T ime and Length Scales\nPaul R. Shearing\nThe Electrochemical Innovation La b\, Chemical Engineering\, University College London\, Gower\nStreet\, Lon don\, WC1E 7JE\, UK\np.shearing@ucl.ac.uk\nElectrochemical device is a ter m used to describe a group of technologies including fuel cells\,\nbatteri es\, electrolysers and super-capacitors. Whilst many of these technologies are already in\ncommon daily usage\, for example Li-ion batteries that po wer our mobile phones\, in the future\nelectrochemical devices will play a n increasing role in our lives – from fuel cells that can power\nour hom es to high performance batteries for our cars.\nAt a microscopic length sc ale\, these devices can be considered as one of a general class of\nporous materials\, whereby the physical microstructure will influence a range of phenomena\,\nincluding diffusion\, catalysis and conductivity – our abi lity to engineer these microscopic\nfeatures to maximize performance can b e translated to substantial improvements in\nmacroscopic device design. At macroscopic length scales the robustness of device design will\ninfluence the system energy and power density and its ability to safely store/conve rt energy\nover extended periods of time.\nAs these materials are likely t o evolve over time\, in response to range of processing and\nenvironmental conditions (sintering\, corrosion\, failure etc)\; understanding how thes e changes\nin microstructure can be linked to understanding of degradation and failure is pivotal to\nimproving device lifetime and safety.\nOver th e past 10 years the increasingly widespread use of X-ray imaging and tomog raphy has\nrevolutionized our understanding of these materials\; with incr easing sophistication researchers\nhave been able to characterize samples over multiple time and length scales from nm to mm\nand from ms to days. H ere we consider examples of our work to explore these materials in\nthree and “four” dimensions\, to examine materials evolution with time. We w ill explore case\nstudies from fuel cells and Li-ion batteries that utiliz e both laboratory and synchrotron X-ray\nsources across a range of spatial and temporal domains\, and examine how improvements in\nthese imaging tec hniques\, alongside correlative spectroscopy\, is providing unprecedented\ ninsight into these materials and devices.\nProfessor Paul Shearing is the Royal Academy of Engineering Chair in\nEmerging Battery Technologies at U niversity College London and\nprevious holder of a Royal Academy of Engine ering Research\nFellowship. His research interests cover a broad range\nof electrochemical engineering themes with a particular interest in the\nrel ationship between performance and microstructure for energy\nmaterials.\nH e is a pioneer of ‘4-D Tomography’ and has used most of the world's\nm ajor synchrotron light sources including the UK’s Diamond\nLightsource. He co-directs UCL’s Electrochemical Innovation lab and\nleads the UK STF C Global Challenge Network in Batteries and\nElectrochemical Devices. He w as a founding investigator of the UK’s\nFaraday Institution.\nHe is the recipient of the Salter’s Graduate Prize and the Janet Watson memorial p rize for research\nexcellence. In 2014 he was named the Institute of Chemi cal Engineers\, Young Chemical Engineer of the\nYear in Academia and in 20 16 the RAEng Engineers Trust Young Engineer of the Year. He is a chartered \nchemical engineer and chartered scientist. LOCATION:Oatley Seminar Room\, Department of Engineering END:VEVENT END:VCALENDAR