| TiO2 / SiO2核 / 壳结构复合粒子的组装及其电化学性能 |
| TiO2 / SiO2 Core / Shell Structured Particles: Assembly and Electrochemical Characteristics |
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| 摘要: |
| 关键词: 原位水解 TiO2 / SiO2 核/壳复合粒子 锂离子电池负极材料 |
| 基金项目: |
| Abstract: TiO2 coated SiO2 materials as anode for lithium-ion batteries were synthesized via an in situ hydrolysis of tetraethyl orthosilicate under ultrasonic irradiation using nanometer-sized TiO2 colloids as precursors. The XRD patterns indicate that the as-prepared core/shell particles remain anatase after calcining below 800 ℃. TEM observation shows that the particle size of TiO2 / SiO2 composites is ca. 200 nm, and a homogeneous SiO2 layer is coated on the surfaces of TiO2 particles. FTIR spectra demonstrate that SiO2 could have been coated on the surfaces of TiO2 particles via a chemical bonding. In addition, the first specific charge and discharge capacities of the coated particle electrode were 66.4 mAh·g-1 and 90.7 mAh·g-1, respectively, which indicates that the TiO2 / SiO2 particles are more stable than the monodispersed TiO2. Meanwhile, the new material has good lithium intercalation-deintercalation performances. |
| Keywords: in situ hydrolysis TiO2 / SiO2 core/shell composite particles anode materials for Li-ion battery |
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| 钱东,程睿菁,卢周广,李波,王洪恩,黄可龙.TiO2 / SiO2核 / 壳结构复合粒子的组装及其电化学性能[J].无机化学学报,2007,23(2):305-309. |
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