1. CUNY EI GRIDS Progress
Zn-MnO2 Flow Cells
CUNY Energy Institute
ARPA-E Visit October 22nd 2012

2. Agenda
9:00 - 9:15 Sanjoy Banejree Agenda & Discussion
9:15 - 10:00 Tal Sholklapper Q8 Progress Report
10:00 - 10:15 Nilesh Ingale High Rate Battery
10:15 - 10:30 Michael Shmuckler Ni-Zn Review
10:30 - 11:15 Valerio DeAngelis & Alex Couzis Commercialization Program
11:15 -12:00 All Battery Demonstrations
12:00 - 1:00 All Lunch w/ Shinnar Lecturer:
Manfred Morari
1:00 - 1:30 All Wrap-Up
1:45 - 3:00 All Shinnar Lecture: Manfred Morari

3. Quarter Highlights
• New Cycling Highs
• Higher DOD in Pasted and Duracell
Batteries
• Lower Cost
• Automotive Starter Battery Demo

4. Pasted Batteries

5. Cycling Highs: Cd-MnO2
Now Up To 1,900 cycles!

6. Cycling Highs: Zn-MnO2
Stable for ~ 1,500 cycles

7. Separator => Cellophane
Two longest lasting batteries. Still cycling.

8. Current Collector => Ni Coated Steel

9. DOD to 20% w/ Cellophane

10. Pasted Zn-MnO2 Scaled to 5.5Ah

11. Pasted Batteries Scaled for
Automotive Starter Battery
Replacement
Presentation and
Demonstration to Follow

12. Flow Batteries

13. 5Ah Battery
Zn-MNO2 Flow Batteries
with our electrode subcontractor, Ultra Life Battery Corporation, and other
the initial generation two cell design has been set at 12 manganese dioxide
h width and 4.5 inch height, shown below.
Fig 4. Rendering of 2nd generation electrode pac

14. Zn-MNO2 Flow Batteries
Proprietary and Confidential

15. Initial Batteries Cycled for ~450 Cycles
Shorted due to poor Zn plating

16. Battery Disassembly

17. Battery Disassembly
Zn#Dendrites#
Area#directly#across#
has#Mn#“ripped#off”#
of#the#CC#

18. Poor Zn Plating at Low Current Densities

19. Increase Charge Currents

20. Better Plating But Still Shorted...

21. Cleaning Cycles Now Being Implemented
Example from Ni/Zn Batteries

22. “Packed Bed” Batteries

23. Gen 2 Battery
• Goals:
• Demonstrate Scalability
• Electrodes
• Cyclability
• Examine
• Current Distribution
• ??

24. DOD on Duracell Now Up to 20%

25. Packed Bed Design
as a wet paste composed of Zn/ZnO/37%KOH/PAA. The two electrodes are then joined,
separated by a layer of battery grade cellophane.
Figure 7. Design schematic of packed bed utilizing bottom-up assembly
The composition of the electrodes was made similar to that found in a Duracell AA alkaline
battery, with weight percentages listed in the below table. The current composition is not
optimized and will be adjusted as we progress in the program.

26. In-House Batteries Still Need Improvement

27. Insight from BNL

28. BNL X17-B Set-Up

29. Duracell Battery Before and After Cycling

30. MnO2 Is Stable Under Our Cycling Conditions

31. Agenda
9:00 - 9:15 Sanjoy Banejree Agenda & Discussion
9:15 - 10:00 Tal Sholklapper Q8 Progress Report
10:00 - 10:15 Nilesh Ingale High Rate Battery
10:15 - 10:30 Michael Shmuckler Ni-Zn Review
10:30 - 11:15 Valerio DeAngelis & Alex Couzis Commercialization Program
11:15 -12:00 All Battery Demonstrations
12:00 - 1:00 All Lunch w/ Shinnar Lecturer:
Manfred Morari
1:00 - 1:30 All Wrap-Up
1:45 - 3:00 All Shinnar Lecture: Manfred Morari