Carbon nanotube-embedding LiFePO 4 as a cathode material for high rate lithium ion batteries

Jegal, Jong Pil; Kim, Kwang Bum

doi:10.1016/j.jpowsour.2013.06.090

Cited by 43 publications

(30 citation statements)

References 23 publications

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“…At high temperature, the decomposition of the electrolyte was accelerated, leading to the generation of more HF which will cause the dissolution of iron from the cathode material. Table 3 The comparison of cycle performance of samples at 5 C and 10 C. La 0.56 Li 0.33 TiO 3 hybrid coating layer can effectively avoid HF in electrolyte eroding LiFePO 4 , and thus can improve the cycling performance at high temperature [29,[46][47][48].…”

Section: Resultsmentioning

confidence: 99%

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Shu

Chen

Wen

et al. 2015

Electrochimica Acta

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Section: Resultsmentioning

confidence: 99%

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Shu

Chen

Wen

et al. 2015

Electrochimica Acta

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“…However, it is difficult to disperse the GNs in an aqueous solution, owing to their hydrophobic surface. We have recently demonstrated that hydrophobic carbon nanotubes (CNTs) can be uniformly dispersed in an aqueous medium with the aid of urea, leading to the successful fabrication of a coaxial‐type FePO 4 ⋅H 2 O/CNT nanocomposite . The dispersive interaction of hydrophobic CNTs with urea in the aqueous solution is stronger than that with water, which enables the uniform dispersion of the CNTs .…”

Section: Introductionmentioning

confidence: 93%

Decoration of Hydrophobic Graphene Nanosheets with Iron Phosphate Based Materials in an Aqueous Solution

et al. 2015

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The surfaces of hydrophobic graphene nanosheets (GNs) are successfully decorated, aided by urea, with FePO4‐based materials in an aqueous solution. The hydrophobic GNs can easily disperse in the aqueous solution without functionalization in the presence of urea, leading to the formation of a GNs‐based nanocomposite with minimal sacrifice of the electrical conductivity of the GNs. Compared with reduced graphene oxide (rGO) decorated with FePO4⋅H2O (FePO4⋅H2O/rGO), synthesized using a graphene oxide (GO) substrate, the resulting FePO4⋅H2O/GNs nanocomposite exhibit superior rate performance, because the GNs have a higher C/O ratio than the rGO. In addition, LiFePO4/GNs with high coulombic efficiency and energy efficiency, prepared using FePO4⋅H2O/GNs, deliver a discharge capacity of 62 mAh g−1 at 120 C rate. Furthermore, a full cell consisting of LiFePO4/GNs and Li4Ti5O12/graphene exhibits excellent rate performance up to 60 C rate.

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“…Carbon 35 sources include inorganic carbon (e.g., carbon black + surface activator), organic sucrose, small molecular acid (e.g., citric acid), big molecular polymer (e.g., PEG10000) [187] and sp2-tapyed carbon (e.g., carbon nanotube (CNT) and graphene). [188], [189] At the second step, LiFePO 4 /C is formed due 40 to vigorous gas evolution (mainly CO and CO 2 ) during degradation and carbonization of the carbon sources. During heat treatment of appropriate precursor, elementary carbon is deposited on the walls of primary nanoparticles as a degradation product.…”

Section: Synthetic Reaction Mechanismmentioning

confidence: 99%

Mechanism studies of LiFePO₄cathode material: lithiation/delithiation process, electrochemical modification and synthetic reaction

Zhang

et al. 2014

RSC Adv.

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Olivine-structured lithium ion phosphate (LiFePO 4 ) is one of the most competitive candidates of energydriven cathode material for sustainable lithium ion battery (LIB) systems. However, the high electrochemical performance is significantly limited by the slow diffusivity of Li-ion in LiFePO 4 (ca. 10 -10 14 cm 2 ·s -1 ) together with the low electronic conductivity (ca. 10 -9 S·cm -1 ), which is the big challenge we are currently facing. To resolve the challenge, many efforts have been directed to dynamics of lithiation/delithiation process in Li x FePO 4 (0≤x≤1), mechanism of electrochemical modification, and synthetic reaction process, which are all crucial for the development of high electrochemical performance for LiFePO 4 material. In this review, in order to reflect the recent progress ranging from very 15 fundamentals to practical applications, we specifically focus on mechanism studies of LiFePO 4 including lithiation/delithiation process, electrochemical modification and synthetic reaction. Firstly, we highlight Li-ion diffusion pathway in Li x FePO 4 and phase translation of Li x FePO 4 . Then we summarize the modification mechanism of LiFePO 4 with high-rated capability, excellent low-temperatured performance and high energy density. Finally, we discuss synthetic reaction mechanism of high-temperatured 20 carbothermal reaction route and low-temperatured hydrothermal/solvothermal reaction route.

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Carbon nanotube-embedding LiFePO 4 as a cathode material for high rate lithium ion batteries

Cited by 43 publications

References 23 publications

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Decoration of Hydrophobic Graphene Nanosheets with Iron Phosphate Based Materials in an Aqueous Solution

Mechanism studies of LiFePO₄cathode material: lithiation/delithiation process, electrochemical modification and synthetic reaction

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Carbon nanotube-embedding LiFePO 4 as a cathode material for high rate lithium ion batteries

Cited by 43 publications

References 23 publications

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Li fast ion conductive La0.56Li0.33TiO3 inlaid LiFePO4/C microspheres with enhanced high-rate performance as cathode materials

Decoration of Hydrophobic Graphene Nanosheets with Iron Phosphate Based Materials in an Aqueous Solution

Mechanism studies of LiFePO4cathode material: lithiation/delithiation process, electrochemical modification and synthetic reaction

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Mechanism studies of LiFePO₄cathode material: lithiation/delithiation process, electrochemical modification and synthetic reaction