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Tailor the Interfaces in Li Ion Battery Materials Jian Luo, Clemson University, DMR 1006515

Tailor the Interfaces in Li Ion Battery Materials Jian Luo, Clemson University, DMR 1006515.

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Tailor the Interfaces in Li Ion Battery Materials Jian Luo, Clemson University, DMR 1006515

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  1. Tailor the Interfaces in Li Ion Battery Materials Jian Luo, Clemson University, DMR 1006515 Researchers in South Carolina have observed a class of impurity-based, nanoscale, glass-like, interfacial phases that form spontaneously at the surfaces and grain boundaries in several lithium ion battery cathode and anode materials, and they further demonstrated that such intergranular and surficial films exhibit a self-limiting thickness that is tunable by changing the thermodynamic potentials. A series of recent studies at Rutgers, MIT and UIUC suggested that such interfacial phases might provide a fast ion conduction path, change the interfacial polarization, and/or alter the phase transition pathway during electrochemical cycling to affect the rate capability and other battery performance properties. This NSF program revealed the underlying fundamental interfacial thermodynamics to enable the use of this phenomenon to tailor battery materials. A high-resolution transmission electron micrograph of the nanoscale glass-like interfacial films formed at the surfaces and grain boundaries in a lithium ion battery cathode material, LiFePO4.

  2. Summer Research for High School StudentsJian Luo, Clemson University, DMR 1006515 In summer 2011, this NSF program hosted three summer research interns: a REU (Research Experience for Undergraduate) student from Penn State (who is a minority) worked on this project for 10 weeks (in conjunction with an NSF REU site program, #1062873); a high-school rising senior from the South Carolina Governor’s School for Science and Mathematics worked on this project for six weeks (in conjunction with a HHMI’s Summer Program for Research Interns); and a high-school graduate/incoming freshmen worked on this project for five weeks (in conjunction with the Clemson’s EUREKA! program). They all earned valuable and inspiring hands-on research experiences via making battery materials and assembling/testing batteries. Moreover, they worked as a team; the REU student, along with two PhD students, helped to mentor and inspire the high school students. A 2011 high-school graduate worked on a summer research project via the support of this NSF program and the EUREKA! program for five weeks prior to starting his freshmen year at Clemson University.

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