Professional Interests:

• Development of fuel cell materials and technologies
• Research on membrane materials for lithium batteries
• New experimental techniques for evaluation of ionics
• Electrical, microstructural and thermal characterization of conducting materials
• Interfacial and related transport property studies of composites/nanocomposites

Education:

Ph.D., Dept. of Physics, Indian Institute of Science, Bangalore, 2004
M.S., Dept. of Physics & Astrophysics, University of Delhi, 1997
B.S., University of Delhi, 1995

Affiliations:

The Electrochemical Society
American Ceramic Society

Selected Publications:

1. “Heterogeneous Electrolyte (YSZ-Al₂O₃)-Based Direct Oxidation Solid Oxide Fuel Cell,” J. S. Thokchom, H. Xiao, M. Rottmayer, T.L. Reitz, and B. Kumar, Journal of  Power Sources, 178 [1] (2008) 26-33.

2. “Space Charge Mediated Ionic Transport in YSZ-Al₂O₃ Composite Membrane,” B. Kumar and J. S. Thokchom, Journal of the American Ceramic Society, 91 [4] (2008) 1175-1181.

3. “Space Charge Induced Signature on Ionic Transport in Heterogeneous Solids,” B. Kumar and J. S. Thokchom, Journal of the American Ceramic Society, 90 [10] (2007) 3323.

4. “Water Durable Lithium Ion Conducting Composite Membranes from the Li₂O-Al₂O₃-TiO₂-P₂O₅ Glass-Ceramic,” Joykumar S. Thokchom and B. Kumar, Journal of the Electrochemical Society, 154 [4] (2007) A331.

5. “Ionically Conducting Composite Membranes from the Li₂O-Al₂O₃-TiO₂-P₂O₅ Glass-Ceramic,” Joykumar S. Thokchom and B. Kumar, Journal of the American Ceramic Society, 90 [2] (2007) 462.

6. “Ionic Conduction Through Heterogeneous Solids: Delineation of the Blocking and  Space Charge Effects,” B. Kumar., S. Nellutla., J. S. Thokchom, and C. Chen, Journal of Power Sources, 160 [2] (2006) 1329.

7. “Microstructural Effects on the Superionic Conductivity of a Lithiated Glass-Ceramic,” Joykumar S. Thokchom and Binod Kumar, Solid State Ionics, 177 [7-8] (2006) 727. 

8. “High Ionic Conductivity Electrolytes in the PEO_X:LiN(SO₂CF₂CF₃)₂-Al₂O₃ System,”  Joykumar S. Thokchom, Christina Chen, K.M. Abraham and Binod Kumar, Solid State Ionics, 176 [23-24] (2005) 1887.

9. “Increased Lithium-Ion Conductivity in (PEG)₄₆LiClO₄ Solid Polymer Electrolyte with d-Al₂O₃ Nanoparticles.” Th. Joykumar Singh and S. V. Bhat, Journal of Power Sources, 129 [2] (2004) 280.

10. “Large Enhancement of Ionic Conductivity in Electron Beam Irradiated (PEG)_XLiClO₄ Solid Polymer Electrolyte,” Th. Joykumar Singh, Ganesh Sanjeev, K. Siddappa and S. V. Bhat, Journal of Polymer Science Part B: Polymer Physics, 42 [7] (2004) 1299.

11. “Morphology and Conductivity Studies of a New Electrolyte: (PEG)_XLiClO₄.”  Th. Joykumar Singh and S. V. Bhat, Bulletin of Materials Science, 26 [7] (2003) 707.

12.  “Enhanced Lithium-Ion Transport in PEG-based Composite Polymer Electrolyte with Mn_0.03Zn_0.97Al₂O₄ Nanoparticles,” Th. Joykumar Singh, T. Mimani, K. C. Patil and S.V. Bhat, Solid State Ionics, 154-155 (2002) 21.

Selected Presentations:

1. “Characterization and Performance Testing of Commercially Available High Rate Lithium-Ion Batteries,” J.P. Fellner, G. J. Loeber, B. Kumar, and J. S. Thokchom, 43rd Power Sources Conference (July 7-10, 2008), Philadelphia, PA.

2. “Rechargeable Lithium-Air Power Sources: Potential and Possibilities,” N. Gupta, J. S. Thokchom and B. Kumar, presented at the 3rd Annual Dayton Engineering Science Symposium (October 29, 2007), Wright State University, Dayton, OH.

3. “Solid Oxide Fuel Cells (SOFC) from YSZ-Al₂O₃ Composite Electrolyte,” J. S. Thokchom, H. Xiao, M. Rottmayer, T.L. Reitz, and B. Kumar, presented at the Material Science and Technology Conference and Exhibition (September 16-20, 2007), Detroit, MI.

4. "Enhanced Lithium-Ion Transport in Poly(ethylene) Glycol-Based Composite Solid Polymer Electrolyte with Mn_0.03Zn_0.97Al₂O₄ nanoparticles," Th. Joykumar Singh, T. Mimani, K. C. Patil and S.V.Bhat, presented at the 13th International Conference on Solid State Ionics (July 8-14, 2001), Cairns, Australia.

5. "Experimental Evidence for 'Space-Charge Defect Regions' in Solid Polymer Electrolyte Dispersed with Alumina Nanoparticles," Th. Joykumar Singh and S.V.Bhat, presented at the International Conference on Materials for Advanced Technology (July 1 – 6, 2001), Singapore.

6. "Enhanced Lithium-Ion Transport in Poly(ethylene) Glycol-Based Composite Solid Polymer Electrolyte with Alumina Nanoparticles," Th. Joykumar Singh and S.V. Bhat, presented at the 42nd Department of Atomic Energy-Solid State Physics Symposium (December 12 – 18, 1999), IGCAR, Kalpakkam, India.

7. "Novel Pulsed Electric Field Method for Measuring Conductivity of Fast Ionic Conductor," Th. Joykumar Singh, S. Madhavi, V. Venkataraman and S.V. Bhat, presented at the 6th Asian Conference on Solid State Ionics (November 28 - December 4, 1998), Surajkund, India.