Surface structure and electrochemical characteristics of plasma-fluorinated petroleum cokes for lithium ion battery

Nakajima, Tsuyoshi; Shibata, Seiko; Naga, Kazuhisa; Ohzawa, Yoshimi; Tressaud, A.; Durand, Etienne; Groult, Henri; Warmont, Fabienne

doi:10.1016/j.jpowsour.2007.03.008

Cited by 18 publications

(20 citation statements)

References 53 publications

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“…First coulombic efficiency of petroleum coke varies depending on the heat-treatment temperatures as given in Table 9.9 [45,46,50]. Figure 9.6 shows TEM images of surfacefluorinated PC2800 samples [47][48][49]. and PC2100 give high first coulombic efficiencies, 88-90%.…”

Section: Effect Of Surface Fluorination Of Petroleum Cokesmentioning

confidence: 99%

“…and PC2100 give high first coulombic efficiencies, 88-90%. Corresponding to this difference, surface disorder is increased by the fluorination using F 2 and plasma fluorination, however, decreased by the fluorination with ClF 3 and NF 3 (Table 9.12) [45,[48][49][50]. Transmission electron microscopy (TEM) reveals that edge plane of heat-treated petroleum cokes is closed by carbon-carbon bond formation, which would make difficult the SEI formation and the insertion of Li + ion into petroleum cokes.…”

Section: Effect Of Surface Fluorination Of Petroleum Cokesmentioning

confidence: 99%

“…They are carbon coating [1][2][3][4][5][6][7][8][9][10][11][12][13][14], metal or metal oxide coating [15][16][17][18][19][20][21][22][23][24][25], surface oxidation [26][27][28][29][30][31][32][33], surface fluorination and chlorination [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52], and polymer, Si or Sb coating …”

mentioning

confidence: 99%

“…These methods of surface modification improve the electrochemical properties of carbon anodes. The surface fluorination of graphitized petroleum cokes opens closed edge surface and enhances surface disorder, which facilitates the formation of SEI on graphitized petroleum cokes, leading to increase in first coulombic efficiencies (decrease in irreversible capacities) [44][45][46][47][48][49][50]. Due to the small dissociation energy of F 2 (155 kJmol −1 ) and the highest electronegativity of fluorine, F 2 has high reactivity with other simple substances and compounds.…”

mentioning

confidence: 99%

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Surface Modification of Carbon Anodes for Lithium Ion Batteries by Fluorine and Chlorine

Nakajima

2015

Advanced Fluoride-Based Materials for Energy Conversion

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Section: Effect Of Surface Fluorination Of Petroleum Cokesmentioning

confidence: 99%

Section: Effect Of Surface Fluorination Of Petroleum Cokesmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Surface Modification of Carbon Anodes for Lithium Ion Batteries by Fluorine and Chlorine

Nakajima

2015

Advanced Fluoride-Based Materials for Energy Conversion

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“…The low cost of this carbonaceous material and its ability to react with large amounts of lithium have promoted vast efforts towards obtaining high-performance coke-based anode materials for use in lithium ion batteries [1][2][3][4]. Unlike graphitized materials, where lithium insertion between graphene layers is the dominant mechanism, the electrochemical reaction of lithium with cokes occurs on the solid electrode surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of oxidation on the performance of low-temperature petroleum cokes as anodes in lithium ion batteries

et al. 2008

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The effect of an oxidative treatment on the electrochemical performance of various low-temperature cokes as anodes in lithium ion batteries was examined in order to optimize their chemical composition and textural properties. Annealing in a stream of dry synthetic air over short time and temperature ranges was found to result in substantially increased cell capacity and improved capacity retention during cycling in coke oxidized at 350°C for 1 h, which exhibited a capacity as high as 385 mAh g -1 after 20 cycles at C/50. However, raising the oxidation temperature to 500°C resulted in undesirably increased irreversible capacity and polarization between the charge and discharge branches, the effect being confirmed by the high impedance values obtained after only a few cycles. 7 Li MAS NMR spectroscopy was used to assess covalency in lithium bonds and its relationship to electrochemical performance in the studied batteries.

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Graphit‐ und‐Silicium‐Anoden für Lithiumionen‐ Hochenergiebatterien

et al. 2019

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Silicium (Si) wird als ein vielversprechendes Anodenmaterial angesehen, mit dessen Hilfe die theoretische Kapazitätsgrenze kohlehaltiger Anodenmaterialien überwunden werden kann. Beim Problem der starken Volumenänderung als Folge der Lithiierung/Delithiierung brachte die Anwendung von Nanomethoden für Si‐Anoden einige Fortschritte. Weniger Erfolg hatte man bei der praktischen Anwendung von Si‐Anoden in kommerziellen Lithiumionen‐Batterien (LIBs). Vor dem Hintergrund eines wachsenden Bedarfs in vielen Bereichen wird der gemeinsame Einsatz des Si mit Graphit als eine wirtschaftlich sinnvolle Methode für die Realisierung hoher Energien diskutiert. Wir erörtern hier die Notwendigkeit der Kombination von Graphit und Si für die Kommerzialisierung und werden die Entwicklung von Graphit/Si‐Anoden im Detail darstellen. Behandelt werden typische Si‐Anoden, die für Graphitblend‐Elektroden verwendet werden und, geordnet nach der jeweiligen Synthesemethode, die Aufbaustrategien für Graphit/Si‐Komposite. Die Kriterien für den Graphit/Si‐Einsatz werden systematisch dargestellt. Zum Abschluss machen wir Vorschläge für die Kommerzialisierung von Graphit/Si‐Kombinationen.

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Surface structure and electrochemical characteristics of plasma-fluorinated petroleum cokes for lithium ion battery

Cited by 18 publications

References 53 publications

Surface Modification of Carbon Anodes for Lithium Ion Batteries by Fluorine and Chlorine

Surface Modification of Carbon Anodes for Lithium Ion Batteries by Fluorine and Chlorine

Effect of oxidation on the performance of low-temperature petroleum cokes as anodes in lithium ion batteries

Graphit‐ und‐Silicium‐Anoden für Lithiumionen‐ Hochenergiebatterien

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