molecular solids as battery electrodes
xiulei ji (纪秀磊)
department of chemistry, oregon state university, corvallis, oregon, united states, 97331
报告时间：2019年6月18日下午15:30
报告地点：联合楼a座二楼会议室
molecular solids are composed of earth-abundant elements, which, as battery electrodes, are potentially suitable for large-scale energy storage purposes. molecular solids are assembled by van der waals forces, and present two critical characteristics: (1) their crystalline structures contain large interstitial sites for hosting guest molecules/ions; (2) their structures are flexible, and the structural transitions of these materials are often elastic and reversible. during the past six years, our group has focused on the choices of charge carriers as a ‘dimension’ of the roadmap for identifying the next-generation energy storage devices. to understand the electrochemical behaviors of different charge carriers, we often resort to organic solids as our model electrode materials. one of these model materials is perylenetetracarboxylic dianhydride (ptcda), which exhibits intriguing properties of storing na , k , mg2 , h3o , nh4 , and even larger molecular ions. in addition, we studied coronene and ferrocene for storing large anions. often by employing the same electrode for different ion charge carriers, the comparative studies brought insights on the nature of the electrochemical properties at the system level. it is the interactions between the electrode hosts and the insertion ions that truly define the energetics and kinetics of the electrochemical reactions. i will visit some snapshots of our studies in this research area during the past six years, and share with you some lessons we have learned.
bio: prof. xiulei ji graduated from jilin university with a b.sc. in chemistry in 2003. he obtained his ph.d. degree from the university of waterloo in 2009. he was an nserc postdoctoral fellow at the university of california, santa barbara from 2010 to 2012. dr. ji is currently a tenured associate professor at the department of chemistry, oregon state university. his h-index is 43 (web of science), and the non-self citations are more than 11,900. he is a scialog fellow. he received the 2018 promising scholar award of oregon state university. he received 2016 career award of national science foundation, the doe energy battery500 seedling award (2017), the acs prf doctoral new investigator award (2015), the innovation challenge award, natural sciences and engineering research council of canada (2010). he serves as an associate editor of carbon energy, a new wiley journal.