V. Focused Fundamental Research - EERE - U.S. Department of ...

V.C.5 Development of High Capacity Anodes (PNNL)
Zhang, Liu – PNNL
dV(lgd) (cc/g)
2.0
1.5
1.0
0.5
Before CVD carbon coating
BJH Adsorption
After CVD
carbon coating
500
(a)
(b)
0.0
0 5 10 15 20 25 30 35 40 45 50
Pore diameter (nm)
Figure V - 86: Structure characterization of porous Si with a 10-nm pore size. a) TEM image shows the carbon coated on porous Si. b) Pore size and pore
volume change of the porous Si before and after carbon coating.
Specific capacity (mAh/g)
Specific capacity (mAh/g)
4000
PSi-5.4 nm discharge
2. Ji-Guang Zhang, Wei Wang, Jie Xiao, Wu Xu,
3500
PSi-7.5 nm discharge Gordon L. Graff, Gary Yang, Daiwon Choi, Deyu
3000
PSi-10 nm discharge
Wang, Xiaolin Li, and Jun Liu. Silicon-Based Anode
for Li-Ion batteries. To be published in Encyclopedia
2500
of Sustainability Science and Technology, a Springer
2000 Reference book edited by Robert A. Meyers et al.
3. Chong-Min Wang, W. Xu, J. Liu, D.W. Choi, B. Arey
1500
1000
1400
1200
1000
800
600
400
200
100 mA/g
(a)
0
0 5 10 15
Cycle number
20 25 30
1 A/g
PSi-5.4 nm charge
PSi-5.4 nm discharge
PSi-7.5 nm charge
PSi-7.5 nm discharge
PSi-10 nm charge
PSi-10 nm discharge
(b)
0
0 20 40 60 80
Cycle number
Figure V - 87: Cycle stability of anodes of porous Si with different pore
sizes. a) Cycle stability at a low current density of 100 mA/g. b) Cycle
stability at high current density of 1 A/g.
FY 2011 Publications/Presentations
1. Xiaolin Li, Praveen Meduri, Shanti Subramanian, Jie
Xiao, Xilin Chen, Chongmin Wang, Ji-Guang Zhang,
and Jun Liu. Pore size effect of porous silicon anodes
for lithium rechargeable batteries. 220 th ECS Meeting,
Boston, MA. October 9-14, 2011.
and L.V. Saraf, J.G. Zhang, Z.G. Yang, S.
Thevuthasan, D.R. Baer, and N. Salmon. In Situ
Transmission Electron Microscopy and Spectroscopy
Studies of Interfaces in Li-Ion Batteries: Challenges
and Opportunities. Journal of Material Research
25(8):1541 (2010).
4. Chong-Min Wang, Wu Xu, Jun Liu, Ji-Guang Zhang,
Lax V. Saraf, Bruce W. Arey, Daiwon Choi, Zhen-
Guo Yang, Jie Xiao, Suntharampillai Thevuthasan,
and Donald R. Baer, In Situ Transmission Electron
Microscopy Observation of Microstructure and Phase
Evolution in a SnO 2 Nanowire during Lithium
Intercalation, Nano Lett., 11 (5): 1874 (2011).
Energy Storage R &D 554 FY 2011 Annual Progress Report