Improvement in the Ppy/V2O5 hybrid as a cathode material for Li ion batteries using PSA as an organic additive

Boyano, Iker; Bengoechea, Miguel; Meatza, Iratxe de; Miguel, Óscar; Cantero, I.; Ochoteco, Estíbalitz; Rodríguez, Javier; Lira‐Cantú, Mónica; Gómez‐Romero, Pedro

doi:10.1016/j.jpowsour.2006.12.106

Cited by 56 publications

(49 citation statements)

References 38 publications

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“…From the data, it is clear that the introduction of a small amount (that is, 2%) of graphene has a profound effect on the electrochemical performance of V 2 O 5 , and the V 2 O 5 -G shows the best electrochemical performance of any reported V 2 O 5 hybrids in the coin cell configuration, as summarized in Supplementary Table 2 (refs 5,7,[29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. However, all performance changes are rooted in the material structure.…”

Section: Resultsmentioning

confidence: 99%

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

et al. 2015

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The long-standing issues of low intrinsic electronic conductivity, slow lithium-ion diffusion and irreversible phase transitions on deep discharge prevent the high specific capacity/energy (443 mAh g À 1 and 1,550 Wh kg À 1 ) vanadium pentoxide from being used as the cathode material in practical battery applications. Here we develop a method to incorporate graphene sheets into vanadium pentoxide nanoribbons via the sol-gel process. The resulting graphene-modified nanostructured vanadium pentoxide hybrids contain only 2 wt. % graphene, yet exhibits extraordinary electrochemical performance: a specific capacity of 438 mAh g À 1 , approaching the theoretical value (443 mAh g À 1 ), a long cyclability and significantly enhanced rate capability. Such performance is the result of the combined effects of the graphene on structural stability, electronic conduction, vanadium redox reaction and lithium-ion diffusion supported by various experimental studies. This method provides a new avenue to create nanostructured metal oxide/graphene materials for advanced battery applications.

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Section: Resultsmentioning

confidence: 99%

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

et al. 2015

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“…This, coupled with SEM analysis, con- , these correspond to the terminal oxygen symmetric stretching mode (v s ) of V=O and the bridge oxygen asymmetric and symmetric stretching modes (v as and v s ) of V-O-V, respectively. [13][14][15] In addition, the characteristic bands of PPy in the 500 -1600 cm -1 range confirms the presence of PPy in the composites. [15][16][17] The IR spectrum of the PPy film prepared by the electrochemical oxidation method is different from that of the PPy powder prepared by a catalyst from the electrolyte solution (Figs.…”

Section: Resultsmentioning

confidence: 59%

“…[10][11][12] The composite powders of inorganic crystallites with polypyrrole have been investigated to overcome the inherently low electronic conductivity of inorganic crystallites and to obtain favorable electrochemical characteristics. [13][14][15][16][17] In the present study, V2O5 and polypyrrole composite (V2O5/PPy) films were grown by an electrochemical polymerization method wherein an anodic potential was applied to a substrate electrode in a solution containing a pyrrole monomer and dispersed V2O5 particles. The use of these composite films increases the discharge capacity owing to their high conductivity, better Li + -ion accessibility, and improved diffusion pathways.…”

Section: Introductionmentioning

confidence: 99%

Increase in Discharge Capacity of Li Battery Assembled with Electrochemically Prepared V₂O₅/polypyrrole-composite-film Cathode

Kim¹,

Kim²,

Thieu³

et al. 2010

Bulletin of the Korean Chemical Society

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Flexible composite films of V2O5 and conductive polypyrrole (V2O5/PPy) were grown by facile electrochemical polymerization, wherein an anodization potential was applied to the substrate electrode in an electrolyte solution containing pyrrole monomer and dispersed V2O5 particles. The coating of polypyrrole (PPy) on the surface of V2O5 particles was induced by the oxidative catalytic action of V2O5 during the electrochemical polymerization of pyrrole. PPy in the composite film connects the isolated V2O5 particles. This results in the formation of conductive networks in the composite film cathode, thereby enhancing the Li + ion diffusion to the surface of the isolated V2O5 particles and thus increasing the accessibility of the Li + ions. The specific capacity tests of the Li rechargeable batteries revealed that the discharge capacity of this composite film cathode was higher, i.e., 497 mAhg -1 , than that of V2O5/PPy powder or pristine V2O5.

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“…Inorganic phase based on V 2 O 5 xerogel is more expanded and is used for synthesis of hybrid materials with conductive polymers. Various intercalated types of conductive polymers, such as PAn, poly (2,2-dithiophen) or PPy are rather well investigated [169,170]. Their redoxintercalation polymerization in V 2 O 5 xerogel is an efficient method for obtaining of layered materials with a conductive polymer layer formed by polyconjugated anisotropic laminar microstructures [171,172].…”

Section: Redox-intercalation Polymerizationmentioning

confidence: 99%

Physical Chemistry of Intercalated System

Pomogailo

Джардималиева

2014

Nanostructured Materials Preparation via Condensation Ways

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The driving force of development of intercalation chemistry is significant improvement of properties of fabricated nanocomposites and design of materials with new properties. Forming hybrid structures (sometimes called "ship-in-the-bottle") define important functional characteristics: improved mechanical strength (increase in modulus), enhanced stiffness, heat resistance (decrease in thermal expansion coefficient), heat stability, and other thermal physical properties, water resistance, interesting barrier properties for gas separation, high flame and fire resistance, electric and electrochemical behavior, size stability, chemical stability, different from the simple additive properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].Hybrid-phase nanocomposites [21] are not only of academic, but of commercial interest, because they posses improved mechanical and thermal properties as compared with the same content of conventional fillers (such as carbon soot or deposited silica gel). The methods of production of hybrid nanocomposites from polymer solutions or polymerization in situ in combination with delamination and exfoliation were already studied at the end of the last century (for example, [22,23]). However, there were technological drawbacks: these methods had low correlation with polymer production and demanded great amounts of organic solvents. At the beginning of 1990s more convenient technique appeared on the basis of PEO (polyethylene-oxide) and MMT (montmorillonite), which advantageously demonstrated the intercalation process in the polymer melt, as well as potential applications of the obtained products in solid phase electrolytes of recharged lithium batteries.However, highly promising commercial strategy in this problem was formulated after the group of researchers of Toyota company [24][25][26] had found extraordinary strengthening of mechanical properties of polymer-layered nylon-based nanocomposites, which was caused by extremely large surface contacts of the ingredients and high aspect ratio reached in the intercalation/exfoliation process, and by homogenous dispersion of silica plates in the polymer matrix [27,28]. On the one hand, these functional materials have a relation to nanocomposites via

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Improvement in the Ppy/V2O5 hybrid as a cathode material for Li ion batteries using PSA as an organic additive

Cited by 56 publications

References 38 publications

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

Increase in Discharge Capacity of Li Battery Assembled with Electrochemically Prepared V₂O₅/polypyrrole-composite-film Cathode

Physical Chemistry of Intercalated System

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Improvement in the Ppy/V2O5 hybrid as a cathode material for Li ion batteries using PSA as an organic additive

Cited by 56 publications

References 38 publications

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

Graphene-modified nanostructured vanadium pentoxide hybrids with extraordinary electrochemical performance for Li-ion batteries

Increase in Discharge Capacity of Li Battery Assembled with Electrochemically Prepared V2O5/polypyrrole-composite-film Cathode

Physical Chemistry of Intercalated System

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Increase in Discharge Capacity of Li Battery Assembled with Electrochemically Prepared V₂O₅/polypyrrole-composite-film Cathode