北京化工大学北京软物质科学与工程高精尖创新中心
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【学术报告】9月24日 Phosphorus anode and its application for energy storage

  报告题目:Phosphorus anode and its application for energy storage 

 

报告人:孙洁 教授    天津大学化工学院

 

报告时间: 2019924日下午14:00  

 

报告地点:科学会堂二楼会议室

 

  

 

报告人简介孙洁,天津大学化工学院教授,院长助理,任《Transaction of Tianjin University》中国科技论文期刊编辑委员会委员。主持国家级、省部级科研项目和企业横向项目共6项。在Nature NanotechnologyAdvanced MaterialsNano LettersACS Nano等国际权威学术期刊上发表论文46余篇,总被引5347次,H因子312017年 入选国家千人计划青年项目;2016年 入选天津市青年千人计划;2018年 天津大学北洋学者计划。研究方向:1、磷负极材料的研究;2、定向导锂膜的研究;33D自支撑碳电极的研究;4、废弃电池的回收与再利用

 

 

报告摘要We have studied two steps of phosphorus electrode reaction mechanisms for lithium-, sodium-, and magnesium- ion batteries: i), the intercalation reaction mechanism, such as graphite anode and lithium cobalt oxide cathode for lithium-ion battery, which has a stable structure without chemical bond breaking for lithiation, leading to a long cycling life, but its specific capacity is low due to the limited lithium-storage sites; ii), the alloying/conversion reaction mechanism, such as silicon anode and sulfur cathode for lithium-ion battery, which has a high theoretical capacity, but decays rapidly because of its large volume expansion for lithiation. In summary, the reaction mechanism of the electrode materials determines its intrinsic characteristics and inherent defects, which is difficult to overcome. Aiming at the above problems, we have designed and constructed a series of micro reactors at the molecular scale, so that the alloying reaction mechanism could be confined in this space and transforms into a similar intercalation reaction mechanism, contributing to improving its structural stability and electrochemical performance.

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