Cobalt doped chromium oxides as cathode materials for secondary lithium batteries
1999; Elsevier BV; Volume: 83; Issue: 1-2 Linguagem: Inglês
10.1016/s0378-7753(99)00284-0
ISSN1873-2755
AutoresDong Zhang, Branko N. Popov, Y. Podrazhansky, Pankaj Kumar Arora, Ralph E. White,
Tópico(s)Advanced Battery Materials and Technologies
ResumoCobalt doped chromium oxides were synthesized and characterized as cathode materials for secondary lithium batteries. A small amount of Co as dopant in the chromium oxides provides greater stability to the structure of CrOx and helps in improving the high-rate behavior of these oxides. Optimized Co0.2CrOx exhibited an initial capacity of 290 mA h/g with an average discharge voltage of 3.0 V vs. Li/Li+. The lithiated Co0.2CrOx exhibited an initial capacity of 230 mA h/g. Both lithiated and non-lithiated Co0.2CrOx were found to be reversible in the entire intercalation range (2.0–4.2 V vs. Li/Li+). Compared with pure CrOx, Co doped CrOx is characterized by better high-rate behavior (>85% capacity for Co0.2CrOx and >75% capacity for LiCo0.2CrOx at 0.65 C discharge rate).
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