Electrochemical properties of LiFePO4/C synthesized using polypyrrole as carbon source

被引：24

作者：

Chen, Sheng-Yao ^{[1
]}

Gao, Bo ^{[1
]}

Su, Ling-Hao ^{[1
]}

Mi, Chang-Huan ^{[1
]}

Zhang, Xiao-Gang ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Nanjing 210016, Jiangsu, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2009年 / 13卷 / 09期

基金：

中国国家自然科学基金;

关键词：

LiFePO4/C; Polypyrrole; Carbonization; Aqueous electrolyte; RECHARGEABLE LITHIUM BATTERIES; COMPOSITE CATHODE MATERIALS; HYDROTHERMAL SYNTHESIS; BEHAVIOR; ELECTROLYTE; PERFORMANCE; IMPURITIES; TIME;

D O I：

10.1007/s10008-008-0696-y

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiFePO4/C composites were synthesized by pyrolysis of LiFePO4/polypyrrole (PPy), which was obtained by an in situ chemical polymerization involving pyrrole monomer and hydrothermal synthesis LiFePO4. All samples were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge techniques. The results showed the LiFePO4/C sintered at 800 A degrees C containing 2.8 wt.% carbon exhibited a higher discharge capacity of 49.6 mAhI double dagger g(-1) at 0.1 C, and bare LiFePO4 only delivered 11.6 mAhI double dagger g(-1) in 2 M LiNO3 aqueous electrolyte. The possible reason for the improvement of electrochemical performance was discussed and could be attributed to the formation of aromatic compounds during the carbonization of PPy.

引用

页码：1361 / 1366

页数：6

共 22 条

[1] Lithium extraction/insertion in LiFePO4:: an X-ray diffraction and Mossbauer spectroscopy study [J].

Andersson, AS ;

Kalska, B ;

Häggström, L ;

Thomas, JO .

SOLID STATE IONICS, 2000, 130 (1-2) :41-52

[2] Electric conductivity changes of polypyrrole and polythiophene films with heat-treatment [J].

Ando, E ;

Onodera, S ;

Iino, M ;

Ito, O .

CARBON, 2001, 39 (01) :101-108

[3] 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

[4] Optimization of synthesis process for carbon-mixed LiFePO4 composite thin-film cathodes deposited by bias sputtering [J].

Chiu, K. -F. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (02) :A129-A133

[5] Morphological characterization of LiFePO4/C Composite cathode materials synthesized via a carboxylic acid route [J].

Fey, George Ting-Kuo ;

Lu, Tung-Lin .

JOURNAL OF POWER SOURCES, 2008, 178 (02) :807-814

[6] Preparation and characterization of nano-particle LiFePO4 and LiFePO4/C by spray-drying and post-annealing method [J].

Gao, Fei ;

Tang, Zhiyuan ;

Xue, Hanjun .

ELECTROCHIMICA ACTA, 2007, 53 (04) :1939-1944

[7] Effect of polymerization time on the humidity sensing properties of polypyrrole [J].

Geng, Wangchang ;

Li, Nan ;

Li, Xiaotian ;

Wang, Rui ;

Tu, Jinchun ;

Zhang, Tong .

SENSORS AND ACTUATORS B-CHEMICAL, 2007, 125 (01) :114-119

[8] Lithium-ion intercalation Behavior of LiFePO4 in aqueous and nonaqueous electrolyte solutions [J].

He, Ping ;

Zhang, Xiao ;

Wang, Yong-Gang ;

Cheng, Liang ;

Xia, Yong-Yao .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2008, 155 (02) :A144-A150

[9] Improved electrode performance of porous LiFePO4 using RuO2 as an oxidic nanoscale interconnect [J].

Hu, Yong-Sheng ;

Guo, Yu-Guo ;

Dominko, Robert ;

Gaberscek, Miran ;

Jamnik, Janko ;

Maier, Joachim .

ADVANCED MATERIALS, 2007, 19 (15) :1963-+

[10] Improving lithium batteries by tethering carbon-coated LiFePO4 to polypyrrole [J].

Huang, Yun-Hui ;

Park, Kyu-Sung ;

Goodenough, John B. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2006, 153 (12) :A2282-A2286

← 1 2 3 →