Surface modified LiFePO4/C nanocrystals synthesis by organic molecules assisted supercritical water process

被引：58

作者：

Rangappa, Dinesh ^{[1
]}

Ichihara, Masaki ^{[2
]}

Kudo, Tetsuichi ^{[1
]}

Honma, Itaru ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058568, Japan

[2] Univ Tokyo, Inst Solid State Phys, Mat Design & Characterizat Lab, Chiba 2778581, Japan

来源：

JOURNAL OF POWER SOURCES | 2009年 / 194卷 / 02期

关键词：

LiFePO4; Nanoelectrode; Surface modification; Supercritical water; Size control; HYDROTHERMAL SYNTHESIS; CHEMICAL-REACTIONS; OLIVINE LIFEPO4; CARBON; PARTICLES; COPRECIPITATION; TEMPERATURE; PERFORMANCE; IMPURITIES;

D O I：

10.1016/j.jpowsour.2009.06.042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

A novel one-pot synthesis strategy has been developed to prepare organic modified LiFePO4/C nanocrystals under organic molecules assisted supercritical water (SCW) conditions. Powder X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) results indicate that crystalline LiFePO4 nanocrystals are formed under SCW conditions. The smallest ever reported LiFePO4 nanocrystals with size ca. 15 nm are obtained by one-pot synthesis at 400 degrees C in short reaction time. The SCW conditions along with suitable surfactants facilitated the in situ organic modification of LiFePO4 with controlled particles size. Further, addition of CNT during the SCW synthesis helps in developing conductive carbon coating on the surface after heat treatment. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1036 / 1042

页数：7

共 29 条

[1]

RAPID AND CONTINUOUS HYDROTHERMAL SYNTHESIS OF BOEHMITE PARTICLES IN SUBCRITICAL AND SUPERCRITICAL WATER [J].

ADSCHIRI, T ;

KANAZAWA, K ;

ARAI, K .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1992, 75 (09) :2615-2618

[2]

Hydrothermal synthesis of metal oxide fine particles at supercritical conditions [J].

Adschiri, T ;

Hakuta, Y ;

Arai, K .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 2000, 39 (12) :4901-4907

[3]

Roles of water for chemical reactions in high-temperature water [J].

Akiya, N ;

Savage, PE .

CHEMICAL REVIEWS, 2002, 102 (08) :2725-2750

[4]

Lithium iron(II) phospho-olivines prepared by a novel carbothermal reduction method [J].

Barker, J ;

Saidi, MY ;

Swoyer, JL .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (03) :A53-A55

[5]

Synthesis and electrochemical analysis of vapor-deposited carbon-coated LiFePO4 [J].

Belharouak, I ;

Johnson, C ;

Amine, K .

ELECTROCHEMISTRY COMMUNICATIONS, 2005, 7 (10) :983-988

[6]

Vibrational spectroscopic investigation of structurally-related LiFePO4, NaFePO4, and FePO4 compounds [J].

Burba, Christopher M. ;

Frech, Roger .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2006, 65 (01) :44-50

[7]

Stability of diamond-like carbon in hydrothermal conditions [J].

Calderon-Moreno, J. M. .

[8]

Synthesis of olivine-type LiFePO4 by emulsion-drying method [J].

Cho, TH ;

Chung, HT .

JOURNAL OF POWER SOURCES, 2004, 133 (02) :272-276

[9]

Effect of surface carbon structure on the electrochemical performance of LiFePO4 [J].

Doeff, MM ;

Hu, YQ ;

McLarnon, F ;

Kostecki, R .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (10) :A207-A209

[10]

Identification of surface impurities on LiFePO4 particles prepared by a hydrothermal process [J].

Dokko, K ;

Shiraishi, K ;

Kanamura, K .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (11) :A2199-A2202

← 1 2 3 →