THE NEXT GENERATION OF BATTERY FOR HIGH ENERGY DENSITY AND POWER - - PowerPoint PPT Presentation

THE NEXT GENERATION OF BATTERY FOR HIGH ENERGY DENSITY AND POWER DENSITY

• Professor Feiyu Kang

Department of Material Science, Tsinghua University Beijing 100084, P. R. China Phone:+86-10-6277-3752; Fax:+86-10-6277-3752; Email: fykang@tsinghua.edu.cn

• Main Principle Investigators：

Professor Gregory C. Rutledge

Department of Chemical Engineering, Massachusetts Institute of Technology 77 Massachusetts Avenue, Room 66-550 Cambridge, MA 02139, USA Phone: +1-617-253-0171; Fax: +1-617-258-5766; Email: rutledge@mit.edu

Professor Alan H. Windle

Department of Materials Science & Metallurgy University of Cambridge Telephone: +44 1223 334323; Fax: +44 1223 335637 Email: ahw1@cam.ac.uk

Co-Principle Investigators：

• Dr. Ying Yang

Department of Electrical Engineering, Tsinghua University Beijing 100084, P. R. China Phone:+86-10-6278-3543; Fax: :+86-10-62792303; Email: yingyang@tsinghua.edu.cn

Professor T. Alan Hatton

Department of Chemical Engineering, Massachusetts Institute of Technology 77 Massachusetts Avenue, Room 66-309 Cambridge, MA 02139, USA Phone: +1-617-253-4588; Fax: +1-617-253-8723; Email: tahatton@mit.edu

Asymmetric Supercapacitor

△EAC ¡ ¡ △EMnO2 ¡ ¡

Negative CAC: 80 F/g Positive CMnO2: 310 F/g

Energy density： 35-40 Wh/Kg I = 0.5 A/g; 0.1 mol L-1 Ca(NO3)2 C = 45 F/g

1. FY Kang, BH Li, CJ Xu. Recent Progress on Manganese Dioxide Based Supercapacitors, Journal of Materials Research, 2010, Accepted. 2. Chengjun Xu, Baohua Li, Hongda Du, et al. Electrochemical properties of nanosized hydrous manganese dioxide synthesized by a self-reacting microemulsion method. J. Power Sources , 2008,180: 664-670.

Electrode CMnO2 (F/g, 5mV/s)

MnO2/CNF-5 568 MnO2/CNF-15 331 MnO2/CNF-30 328 MnO2/CNF-60 188 CNF 4

∫

Δ = dV V I V mv C ) ( 1

Average specific Capacitance calculated by

0.0 0.2 0.4 0.6 0.8 1.0

• ­‑0.004
• ­‑0.003
• ­‑0.002
• ­‑0.001

0.000 0.001 0.002 0.003 0.004

¡ ¡ C urrent ¡D ens ity ¡(A/cm

2)

P otential ¡(V ¡vs .S C E )

¡C NF ¡MnO 2/C NF -­‑5 ¡MnO 2/C NF -­‑15 ¡MnO 2/C NF -­‑30 ¡MnO 2/C NF -­‑60

Morphology and Electrochemical performance of MnO2/CNF

Amorphous structure of MnO2/CNF nanocomposites Conformal and uniform MnO2 coating on CNF; MnO2 Coating thickness increases with increasing reaction time at the expense of CNF

Li|LiPF6|Fiber 200mA/g

Ø Lin Zou, Lin Gan, Ruitao Lv, Mingxi Wang, Zheng-hong Huang, Feiyu Kang, and Wanci Shen. A film of porous carbon nanofibers that contain Sn/SnOx nanoparticles in the pores and its electrochemical performance as an anode material for lithium ion batteries. Carbon.2011,49(1): 89-95 Ø Y Yang, Z. Guo, H. Zhang, YY Shi, FY Kang, TA Hatton and GC Rutledge. A self-supported porous carbon nanofibers that contain Fe3O4 nanoparticles in the pores and its electrochemical performance as an anode material for lithium ion batteries. Preparation to be submitted.

New Anode Materials for Lithum Ion Battery

Composite Electrospun Membrane for Li-ion Battery Separator

PAN ¡ PVDF ¡ PMMA ¡ Polyimide ¡ & ¡ Various ¡ structures ¡

Polyimide electrospun membrane Impedance spectroscapy of PVDF membrane First charge and discharge cycle of PVDF membrane

Thank You For Your Attention!