This chapter will not provide an exhaustive review of the work on cathodes for rechargeable Li batteries, but will try to focus on the most significant recent advances in both fundamentals and applications.
Commercial Li-ion batteries were successfully introduced into the market by Sony in 1991.1 They used LiCo02 as a cathode and more than a decade later this is still the cathode of choice.
... [Show full abstract] Nonetheless, the research on cathode materials has been more intense than ever and remarkable success has been met both at the practical and at the theoretical level. Improving the LiCoCO2 synthesis has contributed to double the specific energy of commercial batteries in 10 years: from 80 to 165 Wh/kg. A new cathode, LiMn204, has been introduced by NEC2–l4a in 1996 and Sanyo4b in 2001, although for a limited market. Some other materials, derived from LiCo02, e.g. LiNi1-x-y
Co
x
M
y
02 (x+y<0.25, M=Mg or AI, preferably), have become serious candidates as future cathodes.