Improving electrochemical properties of spinel lithium titanate by incorporation of titanium nitride via high-energy ball-milling

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• 作者：Jiwei Zhang¹ ; Jingwei Zhang¹ ; Wei Cai ; Fenli Zhang ; Laigui Yu ; Zhishen Wu ; Zhijun Zhang ; ^{zzj391@yahoo.cn}
• 关键词：High-energy ball-milling ; Spinel lithium titanate ; Titanium nitride ; Nanocomposite ; Lithium-ion batteries ; Anode material
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：1 August, 2012
• 卷：211
• 期：Complete
• 页码：133-139
• 文件大小：1114 K

摘要

Li₄Ti₅O₁₂/TiN nanocomposites are fabricated through high-energy ball-milling of the mixture of spinel lithium titanate and TiN powder with different mass ratios of 100:1, 100:2, 100:4, and 100:8 (resultant nanocomposites are denoted as LTO-TiN-1B, LTO-TiN-2B, LTO-TiN-4B, and LTO-TiN-8B). All ball-milled samples exhibit markedly improved electrochemical properties than pristine Li₄Ti₅O₁₂. Particularly, LTO-TiN-2B electrode has a high capacity of 130聽mA聽h聽g^鈭? at a charge/discharge rate of 20C and the capacity retention was 85%after 1000 cycles at 10C, showing the best electrochemical performance and great potential as an anode material for high-rate lithium-ion batteries. The transmission electron microscopy and X-ray diffraction results indicate that amorphous TiN is generated on the surface of LTO. The improved electrochemical performance may be attributed to TiN which can significantly enhance the electronic conductivity of the nanocomposites.