화학공학소재연구정보센터
Journal of Power Sources, Vol.302, 259-265, 2016
Carbon-wrapped TiO2 nanocubes exposed with (001) active facets for high-rate and long-life lithium-ion batteries
A novel method is developed to synthesis TiO2/carbon nanostructured composites (T/CNC) as high-performance anode materials for Li-ion batteries using resorcinol/formaldehyde (RF) as the carbon source. With assistance of hydrofluoric acid (HF) as a shape-controlling agent, TiO2 nanocubes exposed with (001) active facets can be obtained. The T/CNC sample shows higher BET surface area (358 m(2) g(-1)) than the previous materials reported before. When evaluated for lithium storage properties, the T/CNC is able to deliver a capacity of 340.4 mA h g(-1) after 90 cycles at 0.59 C, which is superior to those reported in previous work. At a high rate of 15 C, a high reversible discharge capacity of 126.7 mA h g(-1) is obtained up to 500 cycles and demonstrates excellent rate performance and long-term cycling stability. (C) 2015 Elsevier B.V. All rights reserved.