Template-Free Hydrothermal Synthesis of Nanoembossed Mesoporous LiFePO4 Microspheres for High-Performance Lithium-Ion Batteries

被引：229

作者：

Qian, Jianfeng ^{[1
]}

Zhou, Min ^{[1
]}

Cao, Yuliang ^{[1
]}

Ai, Xinping ^{[1
]}

Yang, Hanxi ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 08期

关键词：

CATHODE MATERIALS; ELECTRODE PERFORMANCE; PHOSPHO-OLIVINES; CARBON; IRON; NANOCOMPOSITE; NANOPARTICLES; COMPOSITE; DEFECTS; ENERGY;

D O I：

10.1021/jp912102k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanoembossed mesoporous LiFePO4 microspheres were first synthesized by a template-free hydrothermal process. These microspheres show a quite uniform size distribution of similar to 3 mu m and are composed of many densely aggregated similar to 100 nm nanoparticles and interconnected nanochannels. This mesoporous structure can allow sucrose to penetrate into the spheres easily and generate a thorough carbon coating on the surface of the nanoparticles in the interior of the spheres. The composite materials' physical properties were further characterized by SEM, TEM, XRD, TG, BET surface area, and Raman spectroscopy. These microspheres as a cathode-active material show high tap density (1.4 g cm(-3)), excellent high rate capability (115 mAh g(-1), 10 C), and cycling stability, possibly fulfilling the requirements of rechargeable lithium batteries for upcoming high power applications.

引用

页码：3477 / 3482

页数：6

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