277813 Design Mesostructured LiMn2O4 As Low-Cost Cathode Materials for Lithium Ion Batteries

Thursday, November 1, 2012: 5:15 PM
336 (Convention Center )
Jian Zhu, Chemical Engineering, Wayne State University, Detroit, MI, K. Y. Simon Ng, Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI and Da Deng, Chemical Engineering and Materials Science, Wayne State University, Detroit, MI

Lithium ion batteries are the dominant power sources for mobile electronic devices and will play increasingly important role in expanding market of electric vehicles and green energy storage. Spinel LiMn2O4, alternative to expensive and toxic LiCoO2, as cathode materials in lithium ion batteries are attracting much attention for advantages of low cost, environmental benignness, and abundance. However, the low lithium-ion diffusion coefficient and capacity fading caused by dismutation reaction of Mn3+ restrict the applications of LiMn2O4 at large/industrial scale where bulky batteries are required to have good cycling performance at high current rate with no significant capacity fading. Our strategy is to design and tailor the structure and composition of LiMn2O4 to improve its conductivity and cycling performance. In this presentation, our latest efforts on the design and facile fabrication of LiMn2O4 as high-power cathode materials will be reported. The unique structure is tailored and controlled to allow fast lithium ion diffusion while maintaining structure stability. The unique mesostructure is fully characterized by electron microscopy and x-ray diffraction and their electrochemical performance in lithium ion batteries is thoroughly evaluated.

Extended Abstract: File Not Uploaded