Lithium Intercalation Properties of Octatitanates Composed of Nanosheets with Various Dimensions

Shinya Suzuki; Masaru Miyayama

doi:10.4028/www.scientific.net/KEM.301.135

Paper Titles

Fabrication of Microstrip Band Pass Filters in GHz Region by Aerosol Deposition Process
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Measurements of Microwave Dielectric Property of Dielectric Thin Layers Using Micro-Sized Planar Electrodes
p.121

Reflection Intensity Measurement for Dielectric Material Using a Microwave Single Probe and Its Electromagnetic Field Analysis
p.125

Dielectric Spectra of BaTiO₃-Based Ceramics Measured by Impedance Analyzer Using Micro Planar Electrodes
p.129

Lithium Intercalation Properties of Octatitanates Composed of Nanosheets with Various Dimensions
p.135

High-Rate Charge-Discharge Performances of β-FeOOH-Carbon Composite Electrodes
p.139

Enhancement on Proton Conductivity of Three-Dimensionally Ordered Macroporous Silica Membrane by Surface Sulfonation
p.143

Preferential Orientation Dependent Mechanical and Electrical Properties in Naβ-Alumina Ceramics
p.147

Synthesis and Evaluation of Electrochemical Properties of Mesoporous Anatase Titania
p.151

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Lithium Intercalation Properties of Octatitanates Composed of Nanosheets with Various Dimensions

Abstract:

Lithium intercalation properties of octatitanates composed of nanosheets were examined. Several types of nanosheet-octatitanates were prepared by the reassembly of tetratitanate nanosheets in colloidal suspension, which were separated centrifugally at various revolutions, and then by a heat treatment. The colloidal suspension was obtained by the exfoliation of tetrabutylammonium tetratitanate intercalation compound. The capacities of the octatitanates composed of nanosheets were approximately 160 mAh/g, and they were maintained even after the exfoliation and the reassembly. The octatitanate composed of nanosheets with relatively small dimensions centrifugally separated at 6000 rpm exhibited a large capacity of 140 mAh/g at a relatively high current density of 1 A/g. The nanosheet process was found to be effective in improving the high rate capability.