Electrochemical performance of ZnO-coated LiMn1.5Ni0.5O4 cathode material

✍ Scribed by Rahul Singhal; Maharaj S. Tomar; Juan G. Burgos; Ram S. Katiyar

• Book ID: 104025194
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 958 KB
• Volume: 183
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.05.014

✦ Synopsis

LiMn 1.5 Ni 0.5 O 4 cathode material was prepared by sol-gel method and annealed at 850 • C for 15 h. The prepared powder was coated with ZnO by dissolving zinc acetate in methanol and LiMn 1.5 Ni 0.5 O 4 powder was mixed in this solution followed by the continuous stirring for 4 h. The LiMn 1.5 Ni 0.5 O 4 and ZnOcoated LiMn 1.5 Ni 0.5 O 4 powder was structurally characterized using X-ray diffraction and scanning electron microscopy (SEM). The coin cell was fabricated using ZnO-coated LiMn 1.5 Ni 0.5 O 4 as cathode materials, LiPF 6 , dissolved in ethylene carbonate (EC)/dimethyl carbonate (DMC) (1:1 wt ratio) as electrolyte, and Li foil as anode. It was found that ZnO-coated LiMn 1.5 Ni 0.5 O 4 cathode materials had the initial discharge capacity of about 146 mA h g -1 . The discharge capacity retention after 50 cycles was found to be nearly 97%.