Synthesis and characterization of LiAl 1/4 Ni3/4O2 (R3m) for lithium-ion (shuttlecock) batteries

Article abstract of DOI:10.1149/1.2048458

The synthesis and characterization of LiAl _1/4 Ni_3/4O₂ were carried out in order to improve the electrochemical properties of LiNiO₂ for lithium ion batteries. Single phase of LiAl _1/4 Ni_3/4O₂ (R3m; a = 2.86 angstrom and c = 14.24 angstrom in hexagonal setting) was obtained by heating a reaction mixture of LiNO₃, NiCO₃, and Al(OH)₃ at 750°C under an oxygen stream for 20 h and examined in nonaqueous lithium cells. LiAl _1/4 Ni_3/4O₂ was oxidized to □_3/4Li _1/4 Al _1/4 Ni_3/4O₂ in the voltage range of 3.5-4.8 V. X-ray diffraction examinations of Li_1-xAl _1/4 Ni_3/4O₂ indicated that the reaction LiAl _1/4 Ni_3/4O₂ ? □_3/4Li _1/4 Al _1/4 Ni_3/4O₂ + (3/4)Li⁺ + (3/4)e^- (ca. 4.75 angstrom of layer separation) (ca. 4.80 angstrom of layer separation) proceeded in a single phase over the entire range. The rechargeable capacity was observed to be about 150 mAh · g^-1 based on the sample weight. DSC measurements on fully charged LiNiO₂ and LiAl _1/4 Ni_3/4O₂ at 4.8 V were also done and the effects of substitution of aluminum for nickel in LiNiO₂ upon the electrochemical properties were discussed in terms of capacity, failure, and safety coupled with overcharge.

Full text of DOI:10.1149/1.2048458

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).

Downloaded on 2014-04-07 to IP 68.181.176.15 address. Redistribution subject to ECS terms of use (see ecsdl.org/site/terms_use) unless CC License in place (see abstract).