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Direct Access to Mesoporous Crystalline TiO 2 /Carbon Composites with Large and Uniform Pores for Use as Anode Materials in Lithium Ion Batteries
Author(s) -
Lee Jinwoo,
Jung Yoon S.,
Warren Scott C.,
Kamperman Marleen,
Oh Seung M.,
DiSalvo Francis J.,
Wiesner Ulrich
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000687
Subject(s) - mesoporous material , anode , materials science , anatase , lithium (medication) , copolymer , carbon fibers , electrode , chemical engineering , composite material , composite number , catalysis , chemistry , organic chemistry , polymer , photocatalysis , medicine , engineering , endocrinology
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.