Scientific Research Division

Education               

1989－1993 Ph.D. in Physical Chemistry, University of Wisconsin at Madison, USA 

 

Employment

1994－1995 Postdoctoral Fellow, Advanced Light Source, Lawrence Berkeley National Laboratory

1993－1994 Postdoctoral Fellow, Chemistry Department, University of California at Berkeley

 

Research Interest

  As energy becomes more valuable, supercapacitors are becoming increasingly important devices for high-performance energy storage. Transition metal oxide/hydroxide-based nanomaterials for supercapacitors attract much attention mainly because they can improve the power capabilities and life cycles through their large surface area. With the unique characteristics of a large specific surface area, large pore volumes and a periodic nanostructure, ordered porous materials prepared by the template route have attracted increasing interest in electrochemical devices. Three-dimensional nanostructured materials are of interest because a 3D continuous transport pathway allows fast ion and electron transport and yields greatly improved reactions for surface catalysis. We develop new synthetic routes to the fabrication of various nanostructured materials through improving their catalytic properties. Our research is aimed at the characterization and spectroscopic study of 3D transition metal oxide/hydroxide composite electrode materials with large area, great capacitance and satisfactory retention ability. The nanostructures of composite electrodes are examined with scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). Detailed element compositions of transition metal oxides/hydroxides are further characterized by X-ray photoelectron spectroscopy (XPS) measurement. X-ray absorption spectroscopy (XAS) comprising the X-ray absorption near-edge structure (XANES) region and the extended X-ray absorption fine structure (EXAFS) are used to investigate the electronic structure and structural evolution of transition metal oxides/hydroxides. In-situ measurements are implemented to disclose the insight into the atomic environment alternation of transition metal oxides/hydroxides during the charge/discharge process.

 

 

 

 

 

 

 

 

Selected Publication

 

1. M.-J. Deng*, C.-Z. Song, C.-C. Wang, Y.-C. Tseng, J.-M. Chen*, and K.-T. Lu*, Low Cost Facile Synthesis of Large-Area Cobalt Hydroxide Nanorods with Remarkable Pseudocapacitance, ACS Appl. Mater. Interfaces (2015) in press.

 

2. M.-J. Deng*, C.-C. Wang, P.-J. Ho, C.-M. Lin, J.-M. Chen*, and K.-T. Lu*, Facile electrochemical synthesis of 3D nanoarchitectured CuO electrodes for highperformance supercapacitors. J. Mater. Chem. A, 2, 12857-12865 (2014).

 

3. S.-A. Chen, Y.-C. Liang, K.-T. Lu*, C.-W. Pao, J.-F. Lee, T.-L. Lin, and J.-M. Chen*, Atomic Distribution and Structural Evolution of Mesostructured PtRu Nanoparticles Electrodeposited on a Microemulsion Lyotropic Liquid- crystalline Template Probed with EXAFS and XANES, Phys. Chem. Chem. Phys. 16, 3939 -3945 (2014).

 

4. M.-J. Deng*, P.-J. Ho, C.-Z. Song, S.-A. Chen, J.-F. Lee, J.-M. Chen*, and K.-T. Lu*, Fabrication of Mn/Mn oxide core-shell electrodes with three-dimensionally ordered macroporous for high capacitance supercapacitors, Energy Environ. Sci. 6, 2178–2185 (2013).

 

5. M.-J. Deng, J.-K. Chang, C.-C. Wang, K.-W. Chen, C.-M. Lin, M.-T. Tang, J.-M. Chen*, and K.-T. Lu*, High-performance Electrochemical Pseudo-capacitor Based on MnO2 Nanowires/Ni Foam as Electrode with a Novel Li-ion Quasi-ionic Liquid as Electrolyte, Energy Environ. Sci. 4, 3942-3946 (2011).

 

6. K. T. Lu*, J. M. Chen*, J. M. Lee, S. C. Haw, Y. C. Liang, and M. J. Deng, Core-level Positive-ion and Negative-ion Fragmentation of Gaseous and Condensed HCCl3 Using Synchrotron Radiation, J. Chem. Phys. 135, 044303-044307 (2011).

 

7. K. T. Lu*, J. M. Chen, J. M. Lee, S. C. Haw, S. A. Chen, Y. C. Liang, and S. W. Chen, State-selective enhanced production of positive ions and excited neutral fragments of gaseous CH2Cl2 following Cl 2p core-level excitation, Phys. Rev. A 82, 033421 (2010).

 

8. K. T. Lu*, J. M. Chen*, J. M. Lee, S. C. Haw, T. L. Chou, S. A. Chen, and T. H. Chen, Core-level anionic photofragmentation of gaseous CCl4 and solid-state analogues, Phys. Rev. A 80, 033406 (2009).

 

9. K. T. Lu*, J. M. Chen*, J. M. Lee, C. K. Chen, T. L. Chou, and H. C. Chen, State-specific dissociation enhancement of ionic and excited neutral photofragments of gaseous CCl4 and solid-state analogs following Cl 2p core-level excitation, New J. Phys. 10 , 053009 (2008).

 

10. J. M. Chen*, K. T. Lu*, J. M. Lee, C. I. Ma, and Y. Y. Lee, State-selective enhanced production of excited fragments and ionic fragments of gaseous Si(CH3)2Cl2 and solid-state analogues following core-level excitation, Phys. Rev. Lett., 92, 243002 (2004).