Electrochemical characteristics of LiNiO2 and LiCoO2 as a positive material for lithium secondary batteries
1995; Elsevier BV; Volume: 54; Issue: 2 Linguagem: Inglês
10.1016/0378-7753(94)02140-x
ISSN1873-2755
AutoresToshiyuki Nohma, H. Kurokawa, Makiko Uehara, Masatoshi Takahashi, Koji Nishio, Toshihiko Saito,
Tópico(s)Advanced Battery Technologies Research
ResumoThe discharge characteristics of lithium nickel oxides have been improved by investigating their synthesizing conditions, such as their raw materials and heat-treating conditions. Lithium hydroxide (LiOH) and nickel hydroxide (Ni(OH)2) were found to be appropriate raw materials, and 750 °C in oxygen atmosphere was the most suitable heat-treating condition. Lithium nickel oxide synthesized under these suitable conditions showed a greater discharge capacity of more than 190 mAh/g than that of lithium cobalt oxide. The existence of lithium carbonate (Li2CO3) was detected, by the Fourier-transform infrared spectroscopy method, in lithium nickel oxide heat-treated in air. This suggests that the existence of Li2CO3 adversely affected the discharge characteristics of lithium nickel oxides.
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