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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. R esearchers in South Carolina are using a high-temperature nanoscale surface phenomenon to improve the performance of lithium ion batteries.

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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 are using a high-temperature nanoscale surface phenomenon to improve the performance of lithium ion batteries. This approach can help us to make batteries that can charge faster, have longer lifetime, and are cheaper to make. Ultimately, such batteries can be used in electric vehicles and other high-power applications. Specifically, researchers have observed a class of impurity-based, nanoscale, glass-like, surface films that form spontaneously at the in several lithium ion battery materials. They further demonstrated that such films exhibit a self-limiting thickness that is tunable by changing the thermodynamic potentials. A series of recent studies conducted in several universities collectively suggested that such surface films might provide a fast ion conduction path, change the interfacial polarization, and protect the interface during electrochemical cycling. This NSF program revealed the underlying fundamental interfacial thermodynamics to enable the use of this phenomenon to tailor battery materials. Kayyar, H. Qian and J. Luo Applied Physics Letters 95: 211905 (2009) A high-resolution transmission electron micrograph of the nanoscale glass-like nanoscale surface films with a select-selecting or “equilibrium” thickness that formed spontaneously in a lithium ion battery cathode material.

  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 (a Latino American) 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 the Clemson’s Summer Program for Research Interns program); 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. In 2012, this program will host/are hosting two additional students, including an African American REU student from Penn State and a high-school graduate/incoming freshmen (EUREKA!) student. 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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