Facile synthesis of hierarchical mesoporous Li4Ti5O12 microspheres in supercritical methanol

Title
Facile synthesis of hierarchical mesoporous Li4Ti5O12 microspheres in supercritical methanol
Authors
AGUNG NUGROHO김수진장원영정경윤김재훈
Keywords
Lithium titanate; Supercritical methanol; Mesoporous; Lithium-ion batteries
Issue Date
2013-12
Publisher
Journal of power sources
Citation
VOL 244, 164-169
Abstract
A facile, template-free route using supercritical methanol for the preparation of hierarchical mesoporous Li4Ti5O12 spinel microspheres in a very short reaction time is introduced. Nanosized, primary Li4Ti5O12 particles (5–10 nm) are loosely aggregated and form micron-sized, secondary mesoporous spheres (0.2–2.0 μm) with a pore size of 2–10 nm. Subsequent calcination of the as-synthesized Li4Ti5O12 at a low temperature of 600 °C results in excellent long-term cyclability and high rate performance. The discharge capacity after 400 cycles at 1 C is 134.9 mAh g−1 (77.6% of the initial discharge capacity), and the discharge capacity at 10 C is 108.5 mAh g−1. The formation mechanism of hierarchical mesoporous microspheres in supercritical methanol is discussed.
URI
http://pubs.kist.re.kr/handle/201004/45247
ISSN
03787753
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KIST Publication > Article
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