This material was used in "The Energy Perspective of Post 3.11 Japan" which was a session of Global Entrepreneurship Week Japan . We discuss about Japanese Energy Perspectives and Innovation.
Event Details:
http://impactjapan.org/event/energy-tohoku/
35. 90年代以降のリチウムイオン電池の技術的進歩
二次電池は、90年代以降、大幅な性能向上(容量密度)を開始した
250
Appearance of nickel-hydrogen batteries and lithium-ion
200
batteries in the 1990s dramatically improved energy
density.
Ni systems
Specfic Energy (Wh/kg)
150
Lithium-ion
Co systems
Mn
100
systems
(1991)
Nickel-Metal hydride
50
(1990)
Nickel-cadmium
Lead-acid
(Junger, 1899)
0
(Plante, 1859)
1850
1900
1950
1990
2000
Shimamura et al, WEVA journal vol.1 pp.
251-257 (2007)
Improvement in specific energy of secondary batteries