“Chimie douce”: A land of opportunities for the designed construction of functional inorganic and hybrid organic-inorganic nanomaterials

Sánchez, Clément; Rozes, Laurence; Ribot, François; Laberty-Robert, Christel; Grosso, David; Sassoye, Capucine; Boissière, Cédric; Nicole, Lionel

doi:10.1016/j.crci.2009.06.001

Cited by 288 publications

(187 citation statements)

References 268 publications

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“…13,14 In this way, the capability of layered titanates to accommodate a variety of guest species between the layers can be exploited to design new materials with improved properties, such as increased capacity for reductive intercalation processes when used as electrodes in battery systems.…”

Section: Introductionmentioning

confidence: 99%

Lepidocrocite-type Layered Titanate Structures: New Lithium and Sodium Ion Intercalation Anode Materials

2014

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The electrochemical characteristics of lepidocrocite-type titanates derived from K 0.8 Ti 1.73 Li 0.27 O 4 are presented for the first time. By exchanging sodium ions for potassium, the practical specific capacity of the titanate in both sodium and lithium half cells is considerably enhanced. Although the gross structural features of the titanate framework are maintained during the ion exchange process, the symmetry changes because sodium occupies different sites from potassium. The smaller size of the sodium ion compared to potassium and the change in site symmetry allow more alkali metal cations to be inserted reversibly into the structure during discharge in sodium and lithium cells than in the parent compound. Insertion of lithium cations takes place at an average of about 0.8V vs. Li + /Li while sodium intercalation occurs at 0.5V vs. Na + /Na, with sloping voltage profiles exhibited for both cell configurations, implying singlephase processes. Ex situ synchrotron X-ray diffraction measurements show that a lithiated 2 lepidocrocite is formed during discharge in lithium cells, which undergoes further lithium insertion with almost no volume change. In sodium cells, insertion of sodium initially causes an overall expansion of about 12% in the b lattice parameter but reversible uptake of solvent minimizes changes upon further cycling. In the case of the sodium cells, both the practical capacity and the cyclability are improved when a more compliant binder (polyacrylic acid) that can accommodate volume changes associated with insertion processes is used in place of the more common polyvinylidene fluoride. The ability to tune the electrochemical properties of lepidocrocite titanate structures by varying compositions and utilizing ion exchange processes make them especially versatile anode materials for both lithium and sodium ion battery configurations.

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Section: Introductionmentioning

confidence: 99%

Lepidocrocite-type Layered Titanate Structures: New Lithium and Sodium Ion Intercalation Anode Materials

2014

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“…The samples structures were analyzed by FT-IR spectroscopy, 1 H MAS (magical angle spinning), 29 Si MAS and 29 Si-{ 1 H} CP-MAS (cross-polarization magical angle spinning) NMR, and SAXS, using the experimental conditions described in a previous work [16]. The surface topography of sample discs was evaluated using a 3D optical variation system IFM G4 (Alcona).…”

Section: Sample Characterizationmentioning

confidence: 99%

“…C10 and C5S5 samples were analyzed by 1 H MAS NMR and the results are depicted in Figure 3. A peak at 0.08 and at 0.13 ppm is assigned to CH 3 groups in C5S5 and C10 samples respectively.…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…Hybrid materials have the advantage of possessing properties that go beyond the simple sum of its organic and inorganic contributions [1]. A documented example is the combination of the mechanical properties of non-bioactive silicone (polidimethylsiloxane -PDMS), with the ability to bind to hard tissues of bioglasses' [2,3], in an attempt to develop new materials to treat bone injuries/defects.…”

Section: Introductionmentioning

confidence: 99%

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A biocompatible hybrid material with simultaneous calcium and strontium release capability for bone tissue repair

Almeida

Wacha

Gomes

et al. 2016

Materials Science and Engineering: C

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“…The incorporation of inorganic particles into the epoxy resins has attracted significant interest as a way to achieve a synergetic combination of typical properties of each component. However, the distribution of such particles in the polymer matrix is a key parameter which can be solved by developing new organic-inorganic hybrid materials constituted by inorganic core surrounded by organic segments with appropriated functional groups able to provide better compatibilization with the organic polymer matrix [2][3][4][5]. The success of this field is mainly assigned to the possibility of preparing inorganic structures by using the soft chemistry approach, also known as ''chimie douce,'' such as the sol-gel processing [6].…”

Section: Introductionmentioning

confidence: 99%

Zirconium-methacrylate oxoclusters as new hybrid materials for the modification of epoxy systems

et al. 2015

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Oxozirconium clusters bearing methacrylate moiety (ZrMe) were synthesized by sol-gel process and used in epoxy networks to develop epoxy-based nanocomposites with potential application as encapsulant for light-emitting diode. Diglycidyl ether of bisphenol A-based epoxy resin was previously functionalized with acrylic acid to introduce some vinyl groups in the matrix and improve its interaction with the oxocluster. The ZrMe particles were previously dispersed in the epoxy matrix or in the 4-methyl-tetrahydrophthalic anhydride used as hardener, and the systems were cured with anhydride or with a combination of anhydride and benzoyl peroxide. The last compound promotes the covalent bond between the epoxy matrix and the ZrMe through free radical reactions between the vinyl groups. The dispersion of ZrMe into the epoxy matrix resulted in a significant increase in viscosity, mainly for systems dispersed with a combination of high shear mechanical mixing and ultrasonification. The dispersion of ZrMe into the anhydride resulted in nanocomposites with higher transparency, better dispersion of the oxocluster into the matrix bulk, as observed by transmission electron microscopy, and higher thermal conductivity, mainly for systems cured with anhydride and peroxide. The use of anhydride in combination with BPO also resulted in significant increase in glass transition temperature.

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“Chimie douce”: A land of opportunities for the designed construction of functional inorganic and hybrid organic-inorganic nanomaterials

Cited by 288 publications

References 268 publications

Lepidocrocite-type Layered Titanate Structures: New Lithium and Sodium Ion Intercalation Anode Materials

Lepidocrocite-type Layered Titanate Structures: New Lithium and Sodium Ion Intercalation Anode Materials

A biocompatible hybrid material with simultaneous calcium and strontium release capability for bone tissue repair

Zirconium-methacrylate oxoclusters as new hybrid materials for the modification of epoxy systems

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