wildcat emi sheet aug15 r4 · em1 with over lithiated oxides em1 with 4.45v nmc electrochemical...
TRANSCRIPT
Wildcat EM15 Volt Electrolyte Material
• A new class of electrolyte additives for high voltage and high temperature stability
• Stable up to 5 volts; extended cycling with CM1, LMNO and OLO
• Also improves performance of cells with NCA, LMO and LFP
• Compatible with existing electrolyte formulation equipment
• Developed by Wildcat’s scientifi c team
Cathode MaximumVoltage Rate Temperature Cycle Life^
BaselineCycle Life^with EM1 Improvement
NMC 4.1 1C 50 °C 110 440 4X
High Voltage NMC 4.45 1C 30 °C 250 650* 2.6X
High Voltage NMC 4.65 1C 30 °C 35 150 4.3X
OLO (Li-rich NMC) 4.6 C/3 30 °C 50 320 6.4X
LMNO (HV Spinel) 4.85 1C 30 °C 200 750 3.75X
CM1 (Wildcat) 4.9 1C 30 °C 20 1000 50X
Cycle Life Comparison
EM1 Summary
E-bikes
Automotive Consumer Electronics
Military
Target Applications
©2012 Wildcat Discovery Technologies, Inc. 6985 Flanders Drive, San Diego, CA 92121-2975 P 858.550.1980 F 858.638.7533
www.wildcatdiscovery.com^Cycled to 80% of initial capacity, *Projected from 500 cycles
Safety
Low Temp
Rate
High Voltage Cost
Cycle Life
High Temp
EC: EMC (RT), 1M LiPF6
+EM1
better
Cycle Life Improvements (full cells, graphite anode)
Wildcat EM1A New Class of Electrolyte Additives
CM1
30%
70%
200 400 600 800 1000
20
40
60
80
100
Cycle
Capaci
ty R
eten
tion (
%)
+EM1.1 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
Cycle
0 200 400 600 0 50 100 150 200 250 300 0 100 200 300 400 500
Ca
pa
city
Ret
enti
on
(%
)
40
60
50
70
80
90
100
+EM1.3 (RT)
EC:EMC, 1M LiPF6 (RT)
Cycle
Ca
pa
city
Ret
enti
on
(%
)
20
40
60
80
100
Cycle
Ca
pa
city
Ret
enti
on
(%
)
60
50
70
80
90
100
+EM1.3 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
0 200 400 60040
60
50
70
80
90
100
+EM1.3 (RT)
EC:EMC, 1M LiPF6 (RT)
+EM1.1 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
Cycle
0 200 400 600 0 50 100 150 200 250 300 0 100 200 300 400 500
Ca
pa
city
Ret
enti
on
(%
)
40
60
50
70
80
90
100
+EM1.3 (RT)
EC:EMC, 1M LiPF6 (RT)
Cycle
Ca
pa
city
Ret
enti
on
(%
)
20
40
60
80
100
Cycle
Ca
pa
city
Ret
enti
on
(%
)
60
50
70
80
90
100
+EM1.3 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
0 50 100 150 200 250 30020
40
60
80
100
+EM1.1 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
Cycle
0 200 400 600 0 50 100 150 200 250 300 0 100 200 300 400 500
Ca
pa
city
Ret
enti
on
(%
)
40
60
50
70
80
90
100
+EM1.3 (RT)
EC:EMC, 1M LiPF6 (RT)
Cycle
Ca
pa
city
Ret
enti
on
(%
)
20
40
60
80
100
Cycle
Ca
pa
city
Ret
enti
on
(%
)
60
50
70
80
90
100
+EM1.3 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
+EM1.1 (30 ºC)
EC:EMC,1M LiPF6 (30 ºC)
EM1 with Wildcat LMNOEM1 with Wildcat CM1
EM1 with Over Lithiated Oxides EM1 with 4.45V NMC
High Throughput Development of EM1Electrochemical Stability
Time(h)
0 2 4 6 8 10
Pa
rasi
tic
curr
ent
(uA
)
0
20
40
60
80
100
120
140
160
+EM1
EC: EMC (1:2), 1M LiPF6
LMO//MCMB, 4.9V
www.wildcatdiscovery.com
70
80
90
100
60
50
40
30
20
10
0
Effic
ienc
y (%
)
0 100 150 250 350 500 600 700 800 800 14501100 1300 1550 1700 1850 2010
Week0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
Effi
cien
cy
80
82
84
86
88
90
92
94
96
98
100
102
Over 2000 formulations screened in only 14 weeks