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Xiqian Yu

Xiqian Yu

Physics Associate

Chemistry Division
Building 555
Brookhaven National Laboratory
P.O. Box 5000
Upton, NY 11973-5000

Phone: (631) 344-4142
FAX:    (631) 344-5815

Electrochemical Energy Storage

Research Interests

  • Developing electrode materials for advanced batteries (e.g. Li-ion, Na-ion, Mg-ion rechargeable batteries)
  • Applying and developing new diagnostic techniques for battery research.
  • Using synchrotron based in situ and time resolved x-ray diffraction and absorption techniques to study energy storage devices, such as batteries and supercapacitors, their components and materials.


  • Ph. D. Condensed Mater Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China, 2005-2010
    Dissertation: Investigations on new materials for Li-ion battery using thin film technologies
  • Bachelor Degree in Physics, Wuhan University, China, 2001-2005


  • Postdoctoral Research Associate, Department of Chemistry, BNL, 2010-2013

Selected Publications

  1. X. Q. Yu, H. Pan, W. Wan, C. Ma, J. Bai, Q. Meng, S. Ehrlich, Y. -S. Hu, X. -Q. Yang, A size-dependent sodium storage mechanism in Li4Ti5O12 investigated by a novel characterization technique combining in situ X-ray diffraction and chemical sodiation, Nano Lett., 2013, 13, 4721-4727.
  2. X.Q. Yu, Y. C. Lyu, L. Gu, H. M. Wu, S. M. Bak, Y. N. Zhou, K. Amine, S. N. Ehrlich, H. Li, K. W. Nam, X. -Q. Yang, Understanding the rate capability of high-energy-density Li-rich layered Li1.2Ni0.15Co0.1Mn0.55O2 cathode materials, Adv. Energy Mater., 2013, DOI: aenm201300950.
  3. Y. Wang, X. Q. Yu, S. Xu, J. Bai, R. Xiao, Y.-S. Hu, H. Li, X.-Q. Yang, L. Q. Chen, X. J. Huang, A zero-strain layered metal oxide as the negative electrode for long-life sodium-ion batteries, Nature. Comm., 2013, 4, 2365. (equally contributed)
  4. J. Liu, X. Q. Yu, E. Hu, K. W. Nam, X. -Q. Yang, P. G. Khalifah, Divalent iron nitridophosphates: A new class of cathode materials for Li-ion batteries, Chem. Mater., 2013, 25, 3929-3931.
  5. J. Xiao, X. Q. Yu, J. Zhen, Y. Zhou, F. Gao, X. Chen, J. Bai, X. -Q. Yang, J. -G. Zhang, Interplay between two-phase and solid solution reactions in high voltage spinel cathode material for lithium ion batteries, J. Power Sources, 2013, 242, 736-741. (equally contributed)
  6. J. P. Dong, X. Q. Yu, Y. Sun, L. Liu, X. -Q. Yang, X. J. Huang, Triplite LiFeSO4F as cathode material for Li-ion batteries, J. Power Sources, 2013, 244, 716-720.
  7. H. L. Pan, X. Lu, X.Q. Yu, Y.-S. Hu,  H. Li, X.-Q. Yang, L.Q. Chen, Sodium storage and transport properties in layered Na2Ti3O7 for room-temperature sodium-ion batteries, Adv. Energy Mater., 2013, 3, 1186-1194.
  8. S. M. Bak, K. W. Nam, W. Y. Chang, X. Q. Yu, E. Y. Hu, S. Y. Hwang, E. A. Stach, K. B. Kim, K. Y. Chung, X. -Q. Yang, Correlating structural changes and gas evolution during the thermal decomposition of charged LixNi0.8Co0.15Al0.05O2 cathode materials, Chem. Mater., 2013, 25, 337-351.
  9. K. W. Nam, S. M. Bak, E. Y. Hu, X. Q. Yu, Y. N. Zhou, X. J. Wang, L. J. Wu, Y. M. Zhu, K. Y. Chung, X. Q. Yang, Combining in situ synchrotron X-Ray diffraction and absorption techniques with transmission electron microscopy to study the origin of thermal instability in overcharged cathode materials for Lithium-ion batteries, Adv. Fun. Mater., 2013, 23, 1047-1063.
  10. X. Q. Yu, Q. Wang, Y. N. Zhou, H. Li, X. -Q. Yang, K. W. Nam, S. N. Ehrlich, S. Khalid, Y. S. Meng, High rate delithiation behaviour of LiFePO4 studied by quick X-ray absorption spectroscopy, Chem. Commun., 2012, 48, 11537�11539.
  11. Y. He, X. Q. Yu, Y. H. Wang, H. Li, X. J. Huang, Alumina-coated patterned amorphous silicon as the anode for a Lithium-ion battery with high coulombic efficiency, Adv. Mater., 2012, 23, 4938-4941.
  12. R.G. Zhang, X. Q. Yu, K. W. Nam, C. Ling, T. S. Arthur, W. Song, A. M. Knapp, S. N. Ehrlich, X. Q. Yang, M. Matsui, α-MnO2 as a cathode material for rechargeable Mg batteries, Electrochem. Commun., 2012, 23, 110-113.
  13. J. M. Zheng, J. Xiao,  X. Q. Yu, L. Kovarik , M. Gu, F. Omenya, X. L. Chen, X. -Q. Yang, J. Liu, G. L. Graff, M. S. Whittingham, J. -G. Zhang, Enhanced Li+ ion transport in LiNi0.5Mn1.5O4 through control of site disorder, Phys. Chem. Chem. Phys., 2012, 14, 13515-13521.
  14. Y. He, X. Q. Yu, G. Li, R. Wang, H. Li, Y. L. Wang, H. J. Gao, X. J. Huang, Shape evolution of patterned amorphous and polycrystalline silicon microarray thin film electrodes caused by lithium insertion and extraction, J. Power Sources, 2012, 216, 131-138.
  15. Y. He, Y. H. Wang, X. Q. Yu, H. Li, X. J. Huang, Si-Cu Thin Film Electrode with Kirkendall Voids Structure for Lithium-Ion Batteries, J. Electrochem. Soc., 2012, 159, A2076-A2081.
  16. R. Wang, X. Q. Yu, J. M. Bai, H. Li, X. J. Huang, L. Q. Chen, X. -Q. Yang, Electrochemical decomposition of Li2CO3 in NiO�Li2CO3 nanocomposite thin film and powder electrodes, J. Power Sources, 2012, 218, 113-118.
  17. X. P. Fang, X. Q. Yu, S. F. Liao, Y. F. Shi, Y. -S. Hu, Z. X. Wang, G. D. Stucky, L. Q. Chen, Lithium storage performance in ordered mesoporous MoS2 electrode material, Microporous Mesoporous Mater., 2012, 151, 418-423.