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

Zhang, Liu – PNNL
V.C.5 Development of High Capacity Anodes (PNNL)
Specific capacity (mAh/g)
1800
1600
1400
1200
1000
800
600
400
200
(a)
Specific capacity (mAh/g)
Specific capacity (mAh/g)
0
0 10 20 30 40 50 60 70 80 90
Cycle number
1800
1600
1400 0.5 A/g
(b)
1200 1 A/g 2A/g
1000
4 A/g
800
8 A/g
600
400
200
0
0 10 20 30 40 50
Cycle number
1800
1600
1400
1200
1000
800
600
400
200
1 A/g
with FEC
without FEC
(c)
0
0 10 20 30 40 50 60 70
Cycle number
Figure V - 85: a) Stable cycling of Si anodes with rigid skeleton support and continuous conductive carbon coating. Good cycling stability and high capacity (~
650 mAh/g anode in 90 cycles at 1 A/g) were obtained using commercial Si powder. b) Si anode cycling at different current densities from 0.5 A/g to 8 A/g. c) Si
anode cycling stability with and without FEC as the electrolyte additive (as in (a). Capacities were calculated based on the full weight of the electrode, including
carbon additive and binders.
FY 2011 Annual Progress Report 553 Energy Storage R&D