Synthesis and electrochemical characterizations of nano-crystalline LiFePO4 and Mg-doped LiFePO4 cathode materials for rechargeable lithium-ion batteries

Arumugam, D.; Kalaignan, G. Paruthimal; Manisankar, P.

doi:10.1007/s10008-008-0533-3

Cited by 73 publications

(33 citation statements)

References 32 publications

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“…The focus of these works is the investigation of the structure and electrochemical behaviour of newly developed active components. Therefore, Raman spec-troscopy is frequently applied either as Raman microscopy [4,5,8,9] or as a spectro-electrochemical method during electrochemical treatment of the electrodes [6,7]. Unfortunately, neither application fulfils the demands of an in-line analytical method.…”

Section: Introductionmentioning

confidence: 98%

Investigation concerning the applicability of raman spectroscopy for prospective inline monitoring of electrode processing for lithium ion batteries

Langklotz

Schneider²,

Seifert

et al. 2011

Materialwissenschaft Werkst

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Die Ramanspektroskopie wurde zur Untersuchung von LCO-Elektroden genutzt, die mittels des Foliengussverfahrens hergestellt wurden. Ziel der Arbeit war es, die Tauglichkeit eines portablen und kostengünstigen Ramanspektrometers für die Inline-Überwachung der Elektrodenherstellung zu testen. Dafür wurden sowohl die gerätespezifischen Limitierungen als auch die Werkstoffeigenschaften der LCO-Elektroden untersucht. Es konnte bewiesen werden, dass der Wärmeeintrag durch den Laser vernachlässigbar gering ist. Charakteristische Eigenschaften des Elektrodenmaterials, wie Rauigkeit und mögliche kristallographische Vorzugsorientierungen, verfälschen die Ramanuntersuchung nicht. Basierend auf diesen Ergebnissen kann die Ramanspektroskopie als verheißungsvolle Methode für die angestrebte Inline-Prozessüberwachung angesehen werden

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Section: Introductionmentioning

confidence: 98%

Investigation concerning the applicability of raman spectroscopy for prospective inline monitoring of electrode processing for lithium ion batteries

Langklotz

Schneider²,

Seifert

et al. 2011

Materialwissenschaft Werkst

View full text Add to dashboard Cite

show abstract

“…On the other hand, Li 3 V 2 (PO 4 ) 3 , which was reported almost at the same time, has a large theoretical specific capacity and excellent cycle stability, thereby drawing much attention [6,7]. In recent years, a lot of progress has been made concerning Li 3 V 2 (PO 4 ) 3 as cathode materials [8][9][10][11], in terms of its complicated internal reaction mechanism and structural transformation under different charging and discharging voltages [12]; the industrial development of Li 3 V 2 (PO 4 ) 3 has not been reported yet, just staying on the stage of experimental research.…”

Section: Introductionmentioning

confidence: 98%

“…After more than 10 years' development, the bottleneck for LiFePO 4 commercial application-poor conductivity, resulting from the low lithium-ion diffusion rate and low electronic conductivity, has been settled by doping metal ions or carbon coating [2][3][4][5]. However, in order to apply it in hybrid electrical vehicles (HEV), the current major issue needed to be resolved is how to improve its discharge capacity and poor cycle stability at high discharge rate.…”

Section: Introductionmentioning

confidence: 98%

Mechanism studies and electrochemical performance optimization on xLiFePO4·(1 − x)Li3V2(PO4)3 hybrid materials

Tang

Guo

Zhong

et al. 2011

J Solid State Electrochem

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Hybrid materials xLiFePO 4 ·(1−x)Li 3 V 2 (PO 4 ) 3 were synthesized by sol-gel method, with phenolic resin as carbon source and chelating agent, methylglycol as surfactant. The crystal structure, morphology and electrochemical performance of the prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), galvanostatic charge-discharge test and particle size analysis. The results show that LiFePO 4 and Li 3 V 2 (PO 4 ) 3 co-exist in hybrid materials, but react in single phase. Compared with individual LiFePO 4 and Li 3 V 2 (PO 4 ) 3 samples, hybrid materials have smaller particle size and more uniform grain distribution. This structure can facilitate Li ions extraction and insertion, which greatly improves the electrochemical properties. The sample 0.7LiFePO 4 ·0.3Li 3 V 2 (PO 4 ) 3 retains the advantages of LiFePO 4 and Li 3 V 2 (PO 4 ) 3 , obtaining an initial discharge capacity of 166 mA h/g at 0.1 C rate and 109 mA h/g at 20 C rate, with a capacity retention rate of 73.3% and an excellent cycle stability.

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“…In the light of these serious disadvantages, extensive research efforts have been made. The corresponding strategies mainly involve in optimizing powder morphology, tailoring the crystallite size, decorating the surface with conductive agents [8][9][10], depositing in carbonaceous matrix [11][12][13][14], doping with alien cations on the Li ion site or/and Fe ion site [4,[15][16][17][18][19][20] and recently anions doping (e.g., Cl − and F − ) on the O ion site [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Inorganic-based sol–gel synthesis of nano-structured LiFePO4/C composite materials for lithium ion batteries

et al. 2011

J Solid State Electrochem

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An inorganic and non-toxic compounds combination of FeCl 2 ·4H 2 O, Li 2 CO 3 and H 3 PO 4 was chosen to synthesize homogeneous nano-structured LiFePO 4 /C composite material via a simplified sol-gel route. The dependency of the physicochemical properties and the corresponding electrochemical responses on the residual carbon content were investigated in details. Rietveld refinement of X-ray diffraction measurement and X-ray photoelectron spectroscopy analysis confirmed the feasibility of preparing pure LiFePO 4 phase via this approach. With increasing amount of residual carbon, the particles size gradually decreased and the bulk electrical conductivity monotonically increased. However, the higher level of residual carbon would bring disadvantageous impact on the lithium ion diffusion. Due to high electrical conductivity, controlled particle size and suitable microstructure, the sample with 4.5 wt.% residual carbon exhibited stable cycling performance and delivered high discharge capacity of 163, 119 and 108 mA hg −1 at 0.1 C, 5 C and 10 C, respectively.

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Synthesis and electrochemical characterizations of nano-crystalline LiFePO4 and Mg-doped LiFePO4 cathode materials for rechargeable lithium-ion batteries

Cited by 73 publications

References 32 publications

Investigation concerning the applicability of raman spectroscopy for prospective inline monitoring of electrode processing for lithium ion batteries

Investigation concerning the applicability of raman spectroscopy for prospective inline monitoring of electrode processing for lithium ion batteries

Mechanism studies and electrochemical performance optimization on xLiFePO4·(1 − x)Li3V2(PO4)3 hybrid materials

Inorganic-based sol–gel synthesis of nano-structured LiFePO4/C composite materials for lithium ion batteries

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