Thermal reactivity study of spinel lithium titanium oxide material for lithium ion battery by thermal and spectral analysis

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• 作者：Hai-Ying Yu^a ; ^b ; Ding Zhang^c ; Zhi Zhu^a ; Qi Lu^a ; ^{qilu@pku.edu.cn" class="auth_mail} ; ^{tdg@pku.edu.cn" class="auth_mail}
• 关键词：Lithium-ion secondary battery ; Lithium titanate ; Thermal reactivity ; State of charge
• 刊名：Journal of Power Sources
• 出版年：1 July, 2014
• 年：2014
• 卷：257
• 期：Complete
• 页码：96-101
• 全文大小：1247 K

文摘

This paper reports the study on thermal reactivity of spinel lithium titanium oxide (Li₄Ti₅O₁₂) material. Thermalgravimetry and Differential scanning calorimetry (TG/DSC) is used to investigate the relevant profiles of Li₄Ti₅O₁₂ and Li₇Ti₅O₁₂ electrodes. TG results show Li₇Ti₅O₁₂ electrode material has higher thermal weight loss, which is 26.7% below 600聽掳C, significantly larger than that of 20.4% for Li₄Ti₅O₁₂ electrode. Moreover, the onset exothermal temperature for Li₇Ti₅O₁₂ electrode material is lower and total exothermal energy is higher. Fourier transform infrared (FT-IR) spectroscopy confirms that more CO group containing compound are generated on Li₇Ti₅O₁₂ electrode. One species can be decomposed below 460聽掳C, and the other one can be decomposed below 600聽掳C. It is conclude that the aforementioned two species leads to higher thermal reaction of Li₇Ti₅O₁₂ electrode.