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Commercial carbon anode material surface-modified by spinel lithium titanate for fast lithium-ion interaction

Published online by Cambridge University Press:  16 December 2019

Lung-Hao Hu*
Affiliation:
Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung804, Taiwan
*
Address all correspondence to Lung-Hao Hu at lunghhu@mail.nsysu.edu.tw and hu@colorado.edu
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Abstract

This research utilizes anatase TiO2 incorporated with lithium salt via a simple wet physical method to surface-modified the commercial graphite to form the lithium titanate/graphite composite coated with an amorphous carbon layer on its surface (the double core–shell structure) to enhance its surface conductivity. This double core–shell structure provides a stable specific capacity about 280 mAh/g under the high current density, 2.25 A/g with 15% capacity retention decay. Its intercalation potential is below 1 V that is much lower than that of 1.55 V, the intercalation potential of spinel Li4Ti5O12, to make higher power and energy density for a full cell.

Type
Research Letters
Copyright
Copyright © Materials Research Society 2019

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