报告题目：锂-空气电池反应原理的原位谱学研究

时间：2021年4月1日15:00-17:00

报告人：彭章泉 研究员，大连化学物理研究所

邀请人：申燕 教授，华中科技大学

地点：武汉光电国家研究中心老楼D302

报告人简介：

彭章泉，大连化学物理研究所研究员，国家杰出青年科学基金获得者。1997年7月本科毕业于武汉大学，2000年7月和2003年12月在中科院长春应化所分别获硕士和博士学位。2004年4月至2006年1月，德国杜塞尔多夫大学物理化学研究所博士后(超快光谱电化学)，2006年1月至2007年11月，丹麦奥尔胡斯大学化学系博士后(自由基电化学)，2007年11月至2012年4月，英国圣安德鲁大学博士后(固态电化学)，2012年4月-2020年9月，长春应化所研究员，2020年9月加入大连化学物理研究所。主要研究方向包括现场光谱/质谱电化学、计算电化学、锂离子/锂-空气电池等领域。至今已在Science, Nat. Mater., Nat. Chem., Nat. Commun., Angew. Chem. Int. Ed., J. Am. Chem. Soc.，Nano Lett.等刊物发表SCI论文50余篇，授权发明专利3项，应邀撰写书籍章节一章。荣获英国牛顿学者，德国洪堡学者等荣誉称号。

Peng Zhangquan is currently a researcher at the Dalian Institute of Chemical Physics and is also a recipient of the National Science Fund for Distinguished Young Scholars. He graduated from Wuhan University with a bachelor's degree in July 1997, and received a master's degree and a doctorate degree from the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences in July 2000 and December 2003, respectively. From April 2004 to April 2012, Dr. Peng successively engaged in post-doctoral research at the University of Düsseldorf, University of Aarhus and University of St. Andrew. From April 2012 to September 2020, he was a researcher at Changchun Institute of Applied Chemistry and joined Dalian Institute of Chemical Physics in September 2020. Dr. Peng's main research directions include field spectroscopy/mass spectroscopy electrochemistry, computational electrochemistry, lithium ion/lithium-air batteries and other fields. So far, he has published more than 50 SCI papers in Science, Nat. Mater., Nat. Chem., Nat. Commun., Angew. Chem. Int. Ed., J. Am. Chem. Soc., Nano Lett. and other journals. At the same time, he also won the honorary titles of British Newtonian Scholar and German Humboldt Scholar.

报告摘要：

锂-空气电池与锂-离子电池相比，具有更高的能量密度，近年来倍受关注。该电池的典型结构为：金属锂负极/锂盐有机电解液/多孔材料正极。正极中的活性物质来自空气中的氧气。目前的锂-空气电池普遍表现为循环寿命有限、能量效率低下，其能量损失主要来自氧气电极反应的过电势。深入研究锂-空气电池的反应原理有利于提升该电池体系的电化学性能。报告人利用现场谱学电化学研究方法结合第一性原理计算，对锂-空气电池氧气电极过程中的中间产物、基元反应、反应位点和受限因子等进行了系统研究，对氧气电极反应过电势的起源进行了探讨，并提出了解决这一关键科学/技术问题的可行方案。

Abstract: Compared with lithium-ion batteries, lithium-air batteries have a higher energy density and have attracted much attention in recent years. Lithium-air batteries have a typical structure of "metal lithium negative electrode/lithium salt organic electrolyte/porous material positive electrode", where the active material in the positive electrode comes from oxygen in the air. Currently, lithium-air batteries generally suffer from limited cycle life and low energy efficiency, and their energy loss mainly comes from the reaction overpotential of oxygen electrode. Therefore, we have thoroughly studied the reaction principle of lithium-air batteries through advanced technology, hoping to improve the electrochemical performance. The reporter used in-site spectroscopy and electrochemical research methods combined with first-principles calculations to systematically study the intermediate products, elementary reactions, reaction sites and restriction factors in the oxygen electrode process of lithium-air batteries, discuss the reaction overpotential origin of oxygen electrode, and propose a feasible solution to solve this key scientific/technical problem.

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