Page 86 - Handbook of Battery Materials
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52 2 Practical Batteries
6.0
Load : 1.2A 3 sec on/7 sec off
5.0
Cell voltage (V) 4.0
3.0
2.0 −20°C 0°C 60°C
23°C
0
0 250 500 750 1000 1250 1500
Number of cycles
Figure 2.36 Pulse discharge characteristics of the 2CR5 lithium–manganese dioxide
battery.
Temp.: 23°C
Voltage profile
Current profile
6
4
Voltage (V) 5 4 3
3 2 Current (A)
1
0
Time (sec/unit)
Shutter released
1 Exposure meter and electromagnetic shutter
2 Winding of film
3 Charge fo strobe light
Figure 2.37 Practical test results of a 2CR5
lithium–manganese dioxide battery in a fully automatic
◦
camera at 23 C.
2.5.2
Lithium–Carbon Monofluoride Batteries
The world’s first Li–(CF) n battery was developed by Matsushita Battery Industrial
Co., and several types are being manufactured.
(CF) n is prepared by the reaction of carbon powder with fluorine gas at an elevated
temperature. The properties of (CF) n are similar to those of polytetrafluoroethylene
(PTFE) which is prepared by organic synthesis.
The discharge reaction of (CF) n is generally considered to be as follows:
Anode reaction: nLi → nLi + ne − (2.13)
+
