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材料与化学化工学部学术报告:Poly(ionic liquid)-derived Nitrogen-Doped Porous Carbon Membranes for Energy and Environmental Applications

报告题目Poly(ionic liquid)-derived Nitrogen-Doped Porous Carbon Membranes for Energy and Environmental Applications

报告人: Prof. Jiayin Yuan, Stockholm University, Sweden




Jiayan Yuan Jiayin Yuan, studied Chemistry at Shanghai Jiao Tong University in 1998-2002. He then moved to Germany and completed his master’s degree in 2004 and PhD degree in 2009. Next he joined the Max Planck Institute of Colloids and Interfaces, Germany and stayed there as a research group leader for 6 years. In 2017 he was appointed as Associate Professor at Clarkson University, USA. In 2018 he came to Stockholm University as a Wallenberg Academy Fellow and since 2019 he has been a full professor in Materials Chemistry with research expertise in functional polymers and carbon materials, including both basic research and applications in sustainable development. Since 2021 he has served as the Director of the Stockholm Material Hub (www.stockholmmaterial.com).



Porous carbon membranes are a group of functional carbon nanomaterials with great promise in catalysis, separation, and electrochemical energy application, due to their structural integrity, continuity and purity. Traditional fabrication methods involve the pressure-facilitated filtration deposition of carbon nanomaterials, such as carbon nanotubes, graphene, graphene oxide, etc.  These methods are extremely powerful in producing flexible porous carbon membranes, but they are weak in the pore structure control, particularly when the pores are in the microporous and mesoporous region.  As an alternative, pyrolysis of polymer precursors can fill in this missing technique. Precise control over the atomic order, local chemical composition, nanoscale morphology and complex pore architecture, plus easy access to large sized membranes of high surface area can be reached by careful design of polymer templates.

Through a templating approach using bio- and synthetic polymers, we were able to fabricate hierarchically structured, nitrogen-doped, graphitic nanoporous carbon membranes in a macroscopic size scale. The pristine nanoporous carbon membranes exhibit an unusually high graphitization degree, excellent conductivity, and oxidation resistance. The multiple structural merits enable such carbon membrane as high-performance electrode in electrochemical energy devices as well as other fields.



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