화학공학소재연구정보센터
Solid State Ionics, Vol.274, 83-87, 2015
In-situ synthesis of nano-Li4Ti5O12/C composite as an anode material for Li-ion batteries
In-situ coating approach using polyvinyl pyrrolidone (PVP) as carbon source is introduced in this work with the aim of getting high rate Li4Ti5O12/C composite. Li4Ti5O12/C composite, particle size of 50-200 nm in diameter, is well dispersed and the carbon layers are 2-4 nm in thickness. Li4Ti5O12/C composite delivers much higher electrochemical performance than Li4Ti5O12, in terms of reversible discharge capacity and rate performance. It exhibits high discharge capacities of 172 mAh g(-1) and 141 mAh g(-1), at 02 C and 10 C-rate, respectively. 95.7% of its initial capacity is retained after 200 cycles at 10 C, demonstrating good cycling stability. (C) 2015 Elsevier B.V. All rights reserved.