Sang-Don Han
Argonne National Laboratory
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Featured researches published by Sang-Don Han.
ACS Applied Materials & Interfaces | 2018
Yun Xu; Caleb Stetson; Kevin N. Wood; Eric Sivonxay; Chun-Sheng Jiang; Glenn Teeter; Svitlana Pylypenko; Sang-Don Han; Kristin A. Persson; Anthony K. Burrell; Andriy Zakutayev
Silicon (Si) is a commonly studied candidate material for next-generation anodes in Li-ion batteries. A native oxide SiO2 on Si is often inevitable. However, it is not clear if this layer has positive or negative effect on the battery performance. This understanding is complicated by the lack of knowledge about the physical properties, and by convolution of chemical and electrochemical effects during the anode lithiation process. In this study, LixSiOy thin films as model materials for lithiated SiO2 were deposited by magnetron sputtering at ambient temperature, with the goal of 1) decoupling chemical reactivity from electrochemical reactivity, and 2) evaluating the physical and electrochemical properties of LixSiOy. XPS analysis of the deposited thin films demonstrate that a composition close to previous experimental reports of lithiated native SiO2, can be achieved through sputtering. Our density functional theory calculations also confirm that possible phases formed by lithiating SiO2 are very close to the measured film compositions. Scanning probe microscopy measurements show the mechanical properties of the film are strongly dependent on lithium concentration, with ductile behavior and higher Li content and brittle behavior at lower Li content. Chemical reactivity of the thin films was investigated by measuring AC impedance evolution, suggesting that LixSiOy continuously reacts with electrolyte, in part due to high electronic conductivity of the film determined from solid state impedance measurements. Electrochemical cycling data of sputter deposited LixSiOy/Si films also suggest that LixSiOy is not beneficial in stabilizing the Si anode surface during battery operation, despite its favorable mechanical properties.Silicon (Si) is a commonly studied candidate material for next-generation anodes in Li-ion batteries. A native oxide SiO2 on Si is often inevitable. However, it is not clear if this layer has a positive or negative effect on the battery performance. This understanding is complicated by the lack of knowledge about the physical properties of the SiO2 lithiation products and by the convolution of chemical and electrochemical effects during the anode lithiation process. In this study, Li xSiO y thin films as model materials for lithiated SiO2 were deposited by magnetron sputtering at ambient temperature, with the goal of (1) decoupling chemical reactivity from electrochemical reactivity and (2) evaluating the physical and electrochemical properties of Li xSiO y. X-ray photoemission spectroscopy analysis of the deposited thin films demonstrate that a composition close to previous experimental reports of lithiated native SiO2 can be achieved through sputtering. Our density functional theory calculations also confirm that the possible phases formed by lithiating SiO2 are very close to the measured film compositions. Scanning probe microscopy measurements show that the mechanical properties of the film are strongly dependent on lithium concentration, with a ductile behavior at a higher Li content and a brittle behavior at a lower Li content. The chemical reactivity of the thin films was investigated by measuring the AC impedance evolution, suggesting that Li xSiO y continuously reacts with the electrolyte, in part because of the high electronic conductivity of the film determined from solid-state impedance measurements. The electrochemical cycling data of the sputter-deposited Li xSiO y/Si films also suggest that Li xSiO y is not beneficial in stabilizing the Si anode surface during battery operation, despite its favorable mechanical properties.
Advanced Energy Materials | 2016
Premkumar Senguttuvan; Sang-Don Han; Soojeong Kim; Albert L. Lipson; Sanja Tepavcevic; Timothy T. Fister; Ira Bloom; Anthony K. Burrell; Christopher S. Johnson
Chemical Communications | 2015
Baofei Pan; Junjie Zhang; Jinhua Huang; John T. Vaughey; Lu Zhang; Sang-Don Han; Anthony K. Burrell; Zhengcheng Zhang; Chen Liao
Journal of Power Sources | 2016
Albert L. Lipson; Sang-Don Han; Soojeong Kim; Baofei Pan; Niya Sa; Chen Liao; Timothy T. Fister; Anthony K. Burrell; John T. Vaughey; Brian J. Ingram
Chemical Communications | 2016
Baofei Pan; Zhenxing Feng; Niya Sa; Sang-Don Han; Qing Ma; Paul Fenter; John T. Vaughey; Zhengcheng Zhang; Chen Liao
MRS Proceedings | 2015
Danielle L. Proffit; Albert L. Lipson; Baofei Pan; Sang-Don Han; Timothy T. Fister; Zhenxing Feng; Brian J. Ingram; Anthony K. Burrell; John T. Vaughey
Journal of Power Sources | 2018
Javier Bareño; Nancy L. Dietz Rago; Fulya Dogan; Donald G. Graczyk; Yifen Tsai; Seema R. Naik; Sang-Don Han; Eungje Lee; Zhijia Du; Yangping Sheng; Jianlin Li; David L. Wood; Leigh Anna Marie Steele; Joshua Lamb; Scott Wilmer Spangler; Christopher Grosso; Kyle R. Fenton; Ira Bloom
Journal of Power Sources | 2018
Ira Bloom; Javier Bareño; Nancy L. Dietz Rago; Fulya Dogan; Donald G. Graczyk; Yifen Tsai; Seema R. Naik; Sang-Don Han; Eungje Lee; Zhijia Du; Yangping Sheng; Jianlin Li; David L. Wood; Leigh Anna Marie Steele; Joshua Lamb; Scott Wilmer Spangler; Christopher Grosso; Kyle R. Fenton
PRiME 2016/230th ECS Meeting (October 2-7, 2016) | 2016
Sang-Don Han; Premkumar Senguttuvan; Soojeong Kim; Albert L. Lipson; Sanja Tepavcevic; Brian J. Ingram; T. T. Fister; Christopher A. Johnson; John T. Vaughey
229th ECS Meeting (May 29 - June 2, 2016) | 2016
Hyun Deog Yoo; Sang-Don Han; Ryan D. Bayliss; Andrew A. Gewirth; Bostjan Genorio; Anthony K. Burrell; Jordi Cabana