TY - JOUR
T1 - High temperature cycleability of spherical spinel LiMn2O4 with Al-doped surface
AU - He, Xiangming
AU - Pu, Weihua
AU - Jiang, Changyin
AU - Zhang, Guoyun
AU - Wan, Chunrong
AU - Zhang, Shichao
PY - 2006/12
Y1 - 2006/12
N2 - The spherical Mn3O4 was prepared by a controlled crystallization process, and the spherical spinel LiMn2O4 was produced by the following procedure: the surface of the spherical Mn3O4 was coated with Al(OH)3, then mixed with LiOH and sintered. The structure and performances of the above material were studied by SEM, XRD, EDS etc. SEM analysis showed that the Al(OH)3 was uniformly coated on the surface of spherical Mn3O4. XRD and EDS analysis's indicated that the Al3+ ions occupied the sites of manganese and Al content of its surface was higher than the average value, indicating that the aluminum was only enriched on the surface of the particles, e.g. the surface doping. Specific capacity of spherical LiMn2O4 decreased after the doping, but its cycle ability at 55°C was improved. Its capacity retention for the spinel LiMn2O4 doped with 6%A1 at 50th cycle at 55°C increased from 68.3% to 79.0%. It means that the surface doping of aluminum is an effective way to improve the elevated temperature performances of spherical spinel LiMn2O4.
AB - The spherical Mn3O4 was prepared by a controlled crystallization process, and the spherical spinel LiMn2O4 was produced by the following procedure: the surface of the spherical Mn3O4 was coated with Al(OH)3, then mixed with LiOH and sintered. The structure and performances of the above material were studied by SEM, XRD, EDS etc. SEM analysis showed that the Al(OH)3 was uniformly coated on the surface of spherical Mn3O4. XRD and EDS analysis's indicated that the Al3+ ions occupied the sites of manganese and Al content of its surface was higher than the average value, indicating that the aluminum was only enriched on the surface of the particles, e.g. the surface doping. Specific capacity of spherical LiMn2O4 decreased after the doping, but its cycle ability at 55°C was improved. Its capacity retention for the spinel LiMn2O4 doped with 6%A1 at 50th cycle at 55°C increased from 68.3% to 79.0%. It means that the surface doping of aluminum is an effective way to improve the elevated temperature performances of spherical spinel LiMn2O4.
KW - Aluminum
KW - Elevated temperature
KW - Spherical spinel LiMnO
KW - Surface doping
UR - https://www.scopus.com/pages/publications/33947518769
M3 - 文章
AN - SCOPUS:33947518769
SN - 1002-185X
VL - 35
SP - 1987
EP - 1990
JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
IS - 12
ER -