Hydrothermal preparation of LiFePO4 nanocrystals mediated by organic acid

被引：133

作者：

Ni, Jiangfeng ^{[1
]}

Morishita, Masanori ^{[2
]}

Kawabe, Yoshiteru ^{[2
]}

Watada, Masaharu ^{[2
]}

Takeichi, Nobuhiko ^{[1
]}

Sakai, Tetsuo ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Kansai Ctr, Osaka 5638577, Japan

[2] GS Yuasa Corp, Nishinosho, Kisshoin, Minami Ku, Kyoto 6018520, Japan

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 09期

关键词：

Lithium ion battery; Cathode; LiFePO4; Hydrothermal; Nanocrystal; Synchrotron radiation; CATHODE MATERIALS; PHOSPHO-OLIVINES; LITHIUM; PERFORMANCE; IMPURITIES; MORPHOLOGY; IRON;

D O I：

10.1016/j.jpowsour.2009.11.017

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：

Well-crystallized LiFePO4 nanoparticles have been directly synthesized in a short time via hydrothermal process in the presence of organic acid, e.g. citric acid or ascorbic acid. These acid-mediated LiFePO4 products exhibit a phase-pure and nanocrystal nature with size about 50-100 nm Two critical roles that. the organic acid mediator plays in hydrothermal process are recognized and a rational mechanism is explored. After a post carbon-coating treatment at 600 degrees C for 1 h, these mediated LiFePO4 materials show a high electrochemical activity in terms of reversible capacity, cycling stability and rate capability. Particularly, LiFePO4 mediated by ascorbic acid can deliver a capacity of 162 mAh g(-1) at 0.1 C, 154 mAh g(-1) at 1 C, and 122 mAh g(-1) at 5 C. The crystalline structure, particle morphology, and surface microstructure were characterized by high-energy synchrotron X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), and Raman spectroscopy. respectively. And the electrochemical properties were thoroughly investigated by galvanostatic test and electrochemical impedance spectroscopy (EIS). (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2877 / 2882

页数：6

共 33 条

[1] Thermal stability of LiFePO4-based cathodes [J].

Andersson, AS ;

Thomas, JO ;

Kalska, B ;

Häggström, L .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2000, 3 (02) :66-68

[2] Raman and FTIR spectroscopic study of LixFePO4 (0 ≤ x ≤ 1) [J].

Burba, CM ;

Frech, R .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (07) :A1032-A1038

[3] The hydrothermal synthesis and characterization of olivines and related compounds for electrochemical applications [J].

Chen, Jiajun ;

Vacchio, Michael J. ;

Wang, Shijun ;

Chernova, Natalya ;

Zavalij, Peter Y. ;

Whittingham, M. Stanley .

SOLID STATE IONICS, 2008, 178 (31-32) :1676-1693

[4] Electronically conductive phospho-olivines as lithium storage electrodes [J].

Chung, SY ;

Bloking, JT ;

Chiang, YM .

NATURE MATERIALS, 2002, 1 (02) :123-128

[5] Size effects on carbon-free LiFePO4 powders [J].

Delacourt, C. ;

Poizot, P. ;

Levasseur, S. ;

Masquelier, C. .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (07) :A352-A355

[6] Particle morphology, crystal orientation, and electrochemical reactivity of LiFePO4 synthesized by the hydrothermal method at 443 K [J].

Dokko, Kaoru ;

Koizumi, Shohei ;

Nakano, Hiroyuki ;

Kanamura, Kiyoshi .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (45) :4803-4810

[7] Synthesis of nanocrystals and morphology control of hydrothermally prepared LiFePO4 [J].

Ellis, B. ;

Kan, Wang Hay ;

Makahnouk, W. R. M. ;

Nazar, L. F. .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (30) :3248-3254

[8] Comparison between different LiFePO4 synthesis routes and their influence on its physico-chemical properties [J].

Franger, S ;

Le Cras, F ;

Bourbon, C ;

Rouault, H .

JOURNAL OF POWER SOURCES, 2003, 119 :252-257

[9] Nano-network electronic conduction in iron and nickel olivine phosphates [J].

Herle, PS ;

Ellis, B ;

Coombs, N ;

Nazar, LF .

NATURE MATERIALS, 2004, 3 (03) :147-152

[10] Synthesis and characterization of nano-sized LiFePO4 cathode materials prepared by a citric acid-based sol-gel route [J].

Hsu, KF ;

Tsay, SY ;

Hwang, BJ .

JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (17) :2690-2695

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