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Synthesis, characterization, and electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries using various carbon sources: best results by using polystyrene nano-spheres
Yu, Shixi1; Dan, Shao1; Luo, Guoen1; Liu, Wei1; Luo, Ying1; Yu, Xiaoyuan1,2; Fang, Yueping1
2012-04-01
发表期刊JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷号16期号:4页码:1675-1681
摘要

Olivine LiFePO4/C cathode materials for lithium ion batteries were synthesized using monodisperse polystyrene (PS) nano-spheres and other carbon sources. The structure, morphology, and electrochemical performance of LiFePO4/C were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), galvanostatic charge-discharge tests, electrochemical impedance spectroscopy (EIS) measurements, and Raman spectroscopy measurements. The results demonstrated that LiFePO4/C materials have an ordered olivine-type structure with small particle sizes. Electrochemical analyses showed that the LiFePO4/C cathode material synthesized from 7 wt.% PS nano-spheres delivers an initial discharge capacity of 167 mAh g(-1) (very close to the theoretical capacity of 170 mAh g(-1)) at 0.1 C rate cycled between 2.5 and 4.1 V with excellent capacity retention after 50 cycles. According to Raman spectroscopy and EIS analysis, this composite had a lower I (D)/I (G), sp (3)/sp (2) peak ratio, charge transfer resistance, and a higher exchange current density, indicating an improved electrochemical performance, due to the increased proportion of graphite-like carbon formed during pyrolysis of PS nano-spheres, containing functionalized aromatic groups.

文章类型Article
关键词Carbon Source Lifepo4 Ps Nano-sphere Lithium Ion Battery Cathode Material
WOS标题词Science & Technology ; Physical Sciences
DOI10.1007/s10008-011-1571-9
研究领域[WOS]Electrochemistry
关键词[WOS]COMPOSITE CATHODE ; COATED LIFEPO4 ; SECONDARY BATTERIES ; POLYMER BATTERY ; NANOPARTICLES ; NANOCOMPOSITE ; PRECURSORS ; ROUTE
收录类别SCI
语种英语
WOS类目Electrochemistry
WOS记录号WOS:000301983300044
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10542
专题中国科学院广州能源研究所
作者单位1.S China Agr Univ, Inst Biomat, Coll Sci, Guangzhou 510642, Guangdong, Peoples R China
2.Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式
GB/T 7714
Yu, Shixi,Dan, Shao,Luo, Guoen,et al. Synthesis, characterization, and electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries using various carbon sources: best results by using polystyrene nano-spheres[J]. JOURNAL OF SOLID STATE ELECTROCHEMISTRY,2012,16(4):1675-1681.
APA Yu, Shixi.,Dan, Shao.,Luo, Guoen.,Liu, Wei.,Luo, Ying.,...&Fang, Yueping.(2012).Synthesis, characterization, and electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries using various carbon sources: best results by using polystyrene nano-spheres.JOURNAL OF SOLID STATE ELECTROCHEMISTRY,16(4),1675-1681.
MLA Yu, Shixi,et al."Synthesis, characterization, and electrochemical performance of LiFePO4/C cathode materials for lithium ion batteries using various carbon sources: best results by using polystyrene nano-spheres".JOURNAL OF SOLID STATE ELECTROCHEMISTRY 16.4(2012):1675-1681.
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