Yunasko supercapacitors – the best choice to get both high power and energy density

1. Yunasko supercapacitors –
the best choice to get both
high power and energy density

2. Yunasko supercapacitors – the best choice to get both high power
and energy density
2

3. Yunasko supercapacitors – the best choice to get both high power
and energy density
3

4. Yunasko supercapacitors – the best choice to get both high power
and energy density
Energy storage system classification
EDLC
Battery
Internal
Serial
Hybrids
Internal
Parallel
Hybrids
AC
BN
AC
AC
2-6 Wh/kg; 1-10 kW/kg
BP
15-200 Wh/kg; 1-5 kW/kg
BP
10-20 Wh/kg; ~2 kW/kg
BN
AC/LTO
AC
AC/LMO
D.Cericola et al. J.Power Sources, 2011, v.196, p.10305-10313
D.Cericola, R. Kötz. Electrochim. Acta, 2012, v.72, p.1-17.
4

5. Yunasko supercapacitors – the best choice to get both high power
and energy density
EDLC vs. Hybrid capacitor (HC)
1. Capacitance
1
CT
1
CP
1
CN
CT
CP ( N )
2
CT
2. Resistance
REDLC < RHC
3. Voltage
CP( N )
UEDLC £UHC
W.G.Pell, B.E.Conway. J.Power Source, 2004, v.136, p.334-345
5

6. Yunasko supercapacitors – the best choice to get both high power
and energy density
Rin
= ʃI2Rint
(low heat generation implies simple design and safety)
= RLoad/(RLoad + Rin)
(high efficiency is important for KERS and many other applications)
~ 1/ Rin
(high power density allows to meet customer requirements with less mass)
(is important for grid frequency regulation)
6

7. Yunasko supercapacitors – the best choice to get both high power
and energy density
SC resistivity (in
total
.cm2)
~ 1.0
Al-C
~ 0.01
C
~ 0.07
Thus:
El
~ 0.9
Though:
El-in-bulk
~ 0.2
“pore resistance”
~ 0.7
10

8. Yunasko supercapacitors – the best choice to get both high power
and energy density
1.7
1.6
EDLC resistivity, R, Ohm.cm2
EDLC resistivity, R, Ohm.cm2
1.7
1.5
1.4
1.3
1.2
1.1
1
1.5
1.3
1.1
0.9
0.7
0.5
2
7
12
Diffusion coefficient, D, 10-10 m2/s
17
1
1.2
1.4
1.6
1.8
2
2.2
Diffusion coefficient, D, 10-10 m2/s
Diffusion coefficients of BF4- anions and EtMe3N+cations in NP carbons
(pulsed field-gradient 19F NMR measurements,
see: Y. Cohen, L. Avram, L. Frish; Angew. Chem. Int. Ed., 2005, 44, p.520 )
8

9. Yunasko supercapacitors – the best choice to get both high power
and energy density
NOTE: in bulk solution
Deff = 10.1 10-10 m2/s
Diffusion coefficients of Fc+ cations in NP carbons
(Rotating Disc Electrode measurements, see: A.J.Bard, L.R.Faulkner; Electrochemical
Methods. Fundamentals and Applications (2nd ed.); Wiley, 2001, p.335 )
9

10. Yunasko supercapacitors – the best choice to get both high power
and energy density
Nippon Chemi-Con2
1.1 s
Maxwell Technologies
0.5
Ioxus
~ 0.7 s
Nesscap
0.5
0.7 s
BatScap
0.4
0.5 s
Wima
~ 0.7 s
Yunasko
0.15
0.7 s
0.20 s
1)
source: JME and ITS test results, also Producer’s site;
2) non-acetonitrile based electrolyte
10

11. Yunasko supercapacitors – the best choice to get both high power
and energy density
15 V, 200 F:
max working voltage 16.2 V
max surge voltage 18.0 V
dc pulse resistance 0.5 mΩ
mass 2.5 kg
(equipped with voltage balancing
system and temperature sensor)
11

12. Yunasko supercapacitors – the best choice to get both high power
and energy density
basic city duty cycle
ΔT:
cells in the centre
cells at the edge
Continuous cycling the module over 8 hours
12

13. Yunasko supercapacitors – the best choice to get both high power
and energy density
13

14. Yunasko supercapacitors – the best choice to get both high power
and energy density
14

15. Yunasko supercapacitors – the best choice to get both high power
and energy density
180
Charge/discharge 20A CC
Q/Q0
R/R0
160
Q/Q0 (R/R0), %
140
120
100
80
60
0
2000
4000
6000
8000
10000
Cycle number
15

16. Yunasko supercapacitors – the best choice to get both high power
and energy density
Device
C,
F
ESR,
RC,
Energy,
Power
Match.Imped.
Power,
m
sec
Wh/kg
(95% eff),
kW/kg
kW/kg
Maxwell Tech a
605
.90
.55
2.4
1.1
9.6
Maxwell Tech c
1200
.29
.35
3.9
2.5
22.5
Ioxus a
2000
.54
1.1
4.0
0.9
8.2
Ioxus c
3000
.17
.51
4.5
2.4
21.5
NessCap a
3160
.4
1.3
4.4
1.0
8.7
BatScap a
2680
.2
.54
4.2
2.05
18.2
Yunasko a,b
1200
.11
.13
4.6
9.7
85.9
Yunasko a,b
1500
.10
.13
4.6
9.2
81.9
Yunasko c
1200
.08
.10
4.3
11.0
95.3
6000
1.0
6.0
36
4.5
~40
2000
1.9
3.8
12
1.0
9.2
Yunasko-hybrid
JSR Micro a
a,c
a)
ITS test results;
b) JME test results;
c)
YUNASKO test results for BCAP1200 P270 K2, RSC2R7308 LR, SP4
16

17. Yunasko supercapacitors – the best choice to get both high power
and energy density
3.
YUNASKO hybrid devices based on mechanical mixture of LIB
and SC components provide the energy density of 36 W.h/kg
accompanied by low internal resistance and good cycle life.
4.
Optimal market niches for hybrid devices can be related with the
tasks that require the operation at high power but at the same
time specific energy of SC devices is not enough.
17

18. Yunasko supercapacitors – the best choice to get both high power
and energy density
Special thanks to my R&D and Design Bureau colleagues:
Dr. Y.Maletin, Dr. S.Zelinskyi, Dr. D.Tretyakov, S.Chernukhin,S.Podmogilny,
S.Tychina, O.Gozhenko, A.Maletin, D.Drobny, and A.Slezin
Our Pilot Plant and Administrative Department:
For the great support, diligence and dedication to work
Many thanks to Dr. Andrew F. Burke (ITS) and Dr. John R. Miller (JME)
for their measurements and stimulating discussions
Financial support from FP7 Project # 286210 (Energy Caps) is very much
acknowledged
18

19. 19