Low-temperature synthesis of peony-like spinel Li4Ti 5O12 as a high-performance anode material for lithium ion batteries

Abstract

Peony-like spinel Li4Ti5O12 was synthesized via calcination of precursor at the temperature of 400°C, and the precursor was prepared through a hydrothermal process in which the reaction of hydrous titanium oxide with lithium hydroxide was conducted at 180°C. The as-prepared product was investigated by SEM, TEM and XRD, respectively. As anode material for lithium ion battery, the Li4Ti5O 12 obtained was also characterized by galvanostatic tests and cyclic voltammetry measurements. It is found that the peony-like Li4Ti 5O12 exhibited high rate capability of 119.7 mAh·g-1 at 10 C and good capacity retention of 113.8 mAh·g-1 after 100 cycles at 5 C, and these results indicate the peony-like Li4Ti5O12 has promising applications for lithium ion batteries with high performance. Peony-like spinel Li4Ti5O12, as an anode material for lithium ion batteries exhibited good capacity retention and high rate capability. Copyright © 2011 SIOC, CAS, Shanghai & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.