報告題目:巨磁阻納米復合材料在能源儲存方面的應用
報告人: 郭占虎 副教授(美國田納西州大學)
報告時間:2019年12月17日(周二)下午4:00
報告地點:明故宮校區A9-506
主辦單位:機械結構力學及控制國家重點實驗室、科協、國際合作處、航空學院
報告內容簡介:
Electrochemicalcapacitors (ECs) have been in urgent demand for utilizing sustainable andrenewable energy sources due to the concerns over both the depletion of fossilfuels and climate changes. However, the current ECs have some challenges, forexample, high power but low energy densities for electric double layercapacitors or high energy but low power densities for pseudocapacitors. Mainefforts have been focused on developing new electrode materials (for example,highly conductive composites with high capacitance), or designing hierarchicalnanomaterials (for example, microstructures with shortened low-resistivepathways for electron transport and ion diffusion). Recently, a small magneticfield of about 0.072 T was reported to significantly enhance the capacitance by155% in a novel magnetic graphene nanocomposite electrode. However, themeasured positive giant magnetoresistance (GMR, a large resistance change uponapplying a magnetic field) of the electrode materials failed to interpret thecapacitance enhancement. Therefore, how the magnetic field affects theelectrochemical energy storage remains unclear. In this talk, the lab-made conductive polymer based- nanocomposites havebeen designed and synthesized to disclose this puzzle.
報告人簡介:
郭占虎 (男,博士生導師)是美國田納西州大學化學和生物分子工程系副教授,1996年本科畢業于山東科技大學化學工程專業;1999年碩士畢業于北京化工大學化學工程專業;1999-2000在北京化工研究院任工程師設計。2000-2005年博士畢業于美國路易斯安那州立大學化學工程專業;2005-2008年在加利福尼亞大學洛杉磯分校機械和航空航天工程系博士后。2008年-2014年在美國德克薩斯州拉馬爾大學任助理教授,2015年至今在美國田納西州大學諾克斯維爾分校任副教授,已在Chemical Society Reviews,Advanced Materials,Advanced Functional Materials, Angewandte Chemie, Energy & EnvironmentalScience,Journal of Materials Chemistry,等國外SCI主流期刊雜志發表研究論文500余篇。郭教授是Advanced Composites and Hybrid Materials期刊主編 和Engineered Science期刊執行主編。