不同钛源制备钛酸锂负极材料及其性能研究

蒋鑫玉; 马光强; 朱芩枚; 田从学

doi:10.7513/j.issn.1004-7638.2023.04.011

不同钛源制备钛酸锂负极材料及其性能研究

doi: 10.7513/j.issn.1004-7638.2023.04.011

攀枝花学院生物与化学工程学院, 四川攀枝花617000

基金项目: 绿色催化四川省高校重点实验室开放基金项目（编号： LYJ1908）。

详细信息

作者简介:
马光强，1977年出生，男，四川泸县人，硕士，教授，通讯作者，主要研究方向为钒钛新能源材料，E-mail：magq3218@163.com

通讯作者:
马光强，1977年出生，男，四川泸县人，硕士，教授，通讯作者，主要研究方向为钒钛新能源材料，E-mail：magq3218@163.com

中图分类号: TF823,TM911
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出版历程
- 收稿日期: 2022-08-26
- 刊出日期: 2023-08-30

Preparation and properties of lithium titanate anode materials with different titanium sources

School of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, Sichuan, China

摘要

摘要: 通过高温固相法制备球形Li₄Ti₅O₁₂负极材料，探究了采用不同钛源所制备的Li₄Ti₅O₁₂的性能差异。通过XRD、SEM对制备的材料进行结构及形貌的表征，同时将合成的材料进行电化学测试。结果表明，分别以纳米TiO₂(P40)、工业H₂TiO₃、含铁工业H₂TiO₃为钛源制备的Li₄Ti₅O₁₂材料t-LTO、h-LTO、f-LTO在较低倍率0.2 C下的放电比容量分别为170.0、156.3、150.7 mAh/g，在较高倍率5 C下的放电比容量分别为91.9、93.0、26.7 mAh/g。在1 C下充放电循环100次后容量保持率分别为97.4%、97.3%、94.6%。以纳米TiO₂及工业H₂TiO₃为钛源制备得到的Li₄Ti₅O₁₂具有较好的电化学性能，因此可用较为纯净的工业H₂TiO₃为钛源代替价格高昂的TiO₂制备Li₄Ti₅O₁₂负极材料。
- 锂离子电池 /
- 负极材料 /
- Li₄Ti₅O₁₂ /
- 高温固相法 /
- 钛源
Abstract: Spherical Li₄Ti₅O₁₂ anode materials were prepared by high temperature solid phase method, and the effects of different titanium sources on the properties of Li₄Ti₅O₁₂ anode materials were investigated. The structure and morphology of the prepared materials were characterized by XRD and SEM, and the synthesized materials were tested by electrochemical method. The results show that the discharge specific capacities of t-LTO, h-LTO and f-LTO prepared with nano TiO₂(P40), industrial H₂TiO₃ and industrial H₂TiO₃ containing iron are 170.0, 156.3 and 150.7 mAh/g at lower charge/discharge rate of 0.2 C, respectively. And the discharge specific capacities at the higher rate of 5 C are 91.9, 93.0 and 26.7 mAh/g, respectively. After 100 cycles of charging and discharging at 1 C, the capacity retention rates are 97.4%, 97.3% and 94.6%, respectively. Li₄Ti₅O₁₂ prepared with nano TiO₂ and industrial H₂TiO₃ has good electrochemical performance, so relatively pure industrial H₂TiO₃ can be used as a substitute for expensive TiO₂ to prepare Li₄Ti₅O₁₂ anode materials.
- lithium ion battery /
- anode materials /
- Li₄Ti₅O₁₂ /
- high temperature solid phase method /
- titanium sources

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图 1 t-LTO、h-LTO及f-LTO的XRD衍射图谱

Figure 1. XRD patterns of t-LTO, h-LTO and f-LTO

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图 2 不同钛源制备Li₄Ti₅O₁₂微球的SEM形貌

Figure 2. SEM images of Li₄Ti₅O₁₂ microspheres prepared with different titanium sources

(a) t-LTO; (b)h-LTO; (c)f-LTO

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图 3 (a)t-LTO、h-LTO和f-LTO在不同速率下的倍率性能; (b) t-LTO、h-LTO和f-LTO在1 C下的循环性能；(c) t-LTO、h-LTO和f-LTO在0.5 mV/s下的CV曲线; (d) t-LTO、h-LTO和f-LTO的EIS曲线

Figure 3. (a) Magnification performance diagrams of t-LTO, h-LTO and f-LTO at different rates, (b) Cycle performance diagrams of t-LTO, h-LTO and f-LTO at 1 C, (c) CV curves of t-LTO, h-LTO and f-LTO at 0.5 mV/s and (d) EIS curves of t-LTO, h-LTO and f-LTO

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