锂离子电池负极材料多孔Li4Ti5O12/C的制备与表征

doi:10.3724/SP.J.1077.2012.00253

无机材料学报 ›› 2012, Vol. 27 ›› Issue (3): 253-257.DOI: 10.3724/SP.J.1077.2012.00253 CSTR: 32189.14.SP.J.1077.2012.00253

锂离子电池负极材料多孔Li₄Ti₅O₁₂/C的制备与表征

高剑, 穆鑫, 李建军, 何向明, 姜长印

(清华大学核能与新能源技术研究院, 北京100084)

收稿日期:2011-03-22 修回日期:2011-04-28 出版日期:2012-03-20 网络出版日期:2012-02-16
基金资助:
国家自然科学青年基金(20903061); 科技部“973”计划课题(2011CB935902)

Preparation and Characterization of Porous Spherical Li₄Ti₅O₁₂/C Anode Material for Lithium Ion Batteries

GAO Jian, MU Xin, LI Jian-Jun, HE Xiang-Ming, JIANG Chang-Yin

(Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China)

Received:2011-03-22 Revised:2011-04-28 Published:2012-03-20 Online:2012-02-16
Supported by:
National Science Foundation of China (20903061); 973 Program (2011CB935902)

摘要/Abstract

摘要： 将钛源、锂源和碳源三种化合物一起球磨湿混成均匀浆料, 再依次经过喷雾干燥和高温煅烧制得晶粒表面包覆纳米碳层的多孔球形钛酸锂(Li₄Ti₅O₁₂)材料. 通过XRD、SEM、TEM、BET和电化学性能测试等分析手段表明, 合成出的Li₄Ti₅O₁₂/C材料为纳米一次粒子(晶粒)组成的球形二次粒子(颗粒), 具有较大的比表面积, 达到 39.5 m²/g; 在0.1C、1.0C和5.0C倍率下的首次放电比容量分别达到172.2、168.2和153.6 mAh/g, 并表现出优良的循环性能. 晶粒表面包覆碳的多孔Li₄Ti₅O₁₂材料具有明显的高倍率性能和循环稳定性优势.

关键词: Li₄Ti₅O₁₂, 多孔, 球形结构, 晶粒包碳, 倍率

Abstract: Titanium, lithium and carbon source compounds were mixed by ball milling firstly, then the slurry was spray dried to prepare spherical precursor. The porous spherical spinel Li₄Ti₅O₁₂/C powders were synthesized by calcining the precursor. XRD, SEM, TEM, BET testing and determination of the electrochemical properties show that the prepared Li₄Ti₅O₁₂/C powders are in form of spherical particles which is composed of nanocrystals. The specific surface area of Li₄Ti₅O₁₂/C powders is as high as 39.5 m²/g. The initial discharge specific capacities of the Li₄Ti₅O₁₂/C anode reach 172.2, 168.2 and 153.6 mAh/g at 0.1C, 1C and 5.0C rates, respectively. The Li₄Ti₅O₁₂/C anode also exhibits excellent cycle performance. The porous Li₄Ti₅O₁₂ material coated by carbon displays excellent high rate performance and cycling stability.

Key words: Li₄Ti₅O₁₂, porous, spherical, carbon coating, cycling capacity

中图分类号:

TQ174

高剑, 穆鑫, 李建军, 何向明, 姜长印. 锂离子电池负极材料多孔Li₄Ti₅O₁₂/C的制备与表征[J]. 无机材料学报, 2012, 27(3): 253-257.

GAO Jian, MU Xin, LI Jian-Jun, HE Xiang-Ming, JIANG Chang-Yin. Preparation and Characterization of Porous Spherical Li₄Ti₅O₁₂/C Anode Material for Lithium Ion Batteries[J]. Journal of Inorganic Materials, 2012, 27(3): 253-257.

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锂离子电池负极材料多孔Li₄Ti₅O₁₂/C的制备与表征

Preparation and Characterization of Porous Spherical Li₄Ti₅O₁₂/C Anode Material for Lithium Ion Batteries

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