Direct Access to Mesoporous Crystalline TiO2/Carbon Composites with Large and Uniform Pores for Use as Anode Materials in Lithium Ion Batteries
✍ Scribed by Jinwoo Lee; Yoon S. Jung; Scott C. Warren; Marleen Kamperman; Seung M. Oh; Francis J. DiSalvo; Ulrich Wiesner
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 734 KB
- Volume
- 212
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
Mesoporous and highly crystalline TiO~2~ (anatase)/carbon composites with large (>5 nm) and uniform pores were synthesized using PI‐b‐PEO block copolymers as structure directing agents. Pore sizes could be tuned by utilizing block copolymers with different molecular weights. The resulting mesoporous TiO~2~/carbon was successfully used as an anode material for Li ion batteries. Without addition of conducting aid (Super P), the electrode showed high capacity during the first insertion/desertion cycle due to carbon wiring inside the walls of mesoporous TiO~2~/carbon. The electrode further showed stable cycle performance up to 50 cycles and the specific charge capacity at 30 C was 38 mA h (g of TiO~2~)^−1^, which indicates CCM‐TiO~2~/carbon can be used as a material for high rate use. magnified image