Synthesis of lithium insertion material Li4Ti5O12 from rutile TiO2 via surface activation

✍ Scribed by Tao Yuan; Rui Cai; Peng Gu; Zongping Shao

• Book ID: 104025916
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 572 KB
• Volume: 195
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2009.11.073

✦ Synopsis

The synthesis of spinel-type lithium titanate, Li 4 Ti 5 O 12 , a promising anode material of secondary lithiumion battery, from "inert" rutile TiO 2 , is investigated. On the purpose of increasing the reactivity of rutile TiO 2 , it is treated by concentrated HNO 3 . By applying such activated rutile TiO 2 as the titanium source in combination with the cellulose-assisted combustion synthesis, phase-pure Li 4 Ti 5 O 12 is successfully synthesized at 800 • C, at least 150 • C lower than that based on solid-state reaction. The resulted oxide shows a reversible discharge capacity of ∼175 mAh g -1 at 1 C rate, near the theoretical value. The resulted oxide also shows promising high rate performance with a discharge capacity of ∼100 mAh g -1 at 10 C rate and high cycling stability.