Anhydrous proton exchange membranes comprising of chitosan and phosphorylated graphene oxide for elevated temperature fuel cells

Bai, Huijuan; Li, Yifan; Zhang, Haoqin; Chen, Huiling; Wu, Wenjia; Wang, Jingtao; Liu, Jindun

doi:10.1016/j.memsci.2015.08.012

Cited by 109 publications

(47 citation statements)

References 61 publications

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“…An Arbuzov reaction uses phosphonic acid esters and an hydrolysis step is necessary to obtain phosphonic acids, which in the case of phosphonate esters requires harsh conditions. In the phosphorylated GO nanosheets reported by Bai et al the weight percentage of P was about 0.5% [5], which is unacceptably low taking into account the multi-step approach. According to Kim et al in phosphorous-doped graphene obtained by ball-milling the loading amount of phosphorus could reach up to 23.9 wt % [4].…”

Section: Resultsmentioning

confidence: 99%

“…However interesting, the described method is time consuming and requires specialized equipment. A multistep procedure for phosphorylating GO and the usage of the latter as proton exchange membranes component was presented in [5]. Phosphorylated GO was synthesized via distillation–precipitation polymerization using dimethyl vinylphosphonate as monomer together with cross-linker and initiator.…”

Section: Introductionmentioning

confidence: 99%

“…Effective functionalization by fully scalable, low-cost methods and detailed characterization of the synthesized nanomaterials is the first step towards utilizing the whole spectrum of applications. Functionalization of carbonaceous nanomaterials with phosphonic groups offers great potential for various applications, e.g., in energy conversion and storage [5,10], flame retardation [4,11], catalysis [12], tissue engineering [13], and purification air and water [6,14]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fully scalable one-pot method for the production of phosphonic graphene derivatives

Żelechowska¹,

Prześniak-Welenc²,

Łapiński³

et al. 2017

Beilstein J. Nanotechnol.

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Graphene oxide was functionalized with simultaneous reduction to produce phosphonated reduced graphene oxide in a novel, fully scalable, one-pot method. The phosphonic derivative of graphene was obtained through the reaction of graphene oxide with phosphorus trichloride in water. The newly synthesized reduced graphene oxide derivative was fully characterized by using spectroscopic methods along with thermal analysis. The morphology of the samples was examined by electron microscopy. The electrical studies revealed that the functionalized graphene derivative behaves in a way similar to chemically or thermally reduced graphene oxide, with an activation energy of 0.014 eV.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fully scalable one-pot method for the production of phosphonic graphene derivatives

Żelechowska¹,

Prześniak-Welenc²,

Łapiński³

et al. 2017

Beilstein J. Nanotechnol.

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show abstract

“…Similar to the water uptake behavior, CS/CS@CNTs‐1 composite membrane exhibits the highest area swelling. Although the composite membranes exhibited a slightly increased area swelling ratio, they still possess good dimensional stability when compared with other CS‐based composite membranes …”

Section: Methodsmentioning

confidence: 98%

Chitosan‐based composite membranes containing chitosan‐coated carbon nanotubes for polymer electrolyte membranes

Tsen

Gong

et al. 2017

Polymers for Advanced Techs

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Considering the poor dispersion and inert ionic conduction ability of carbon nanotubes (CNTs), functionalization of CNTs is a critical issue for their application in polymer electrolyte membranes.Herein, CNTs were functionalized by the polyelectrolyte, chitosan (CS), via a facile noncovalent surface-deposition method. The obtained CS-coated CNTs (CS@CNTs) were then incorporated into the CS matrix and fabricated composite membranes. The CS coating can enhance the compatibility between CNTs and the matrix, thus ensuring the homogenous dispersion of CS@CNTs and effectively improved the mechanical properties of the composites. Moreover, the CS coating can make CS@CNTs act as an additional proton-conducting pathway through the membranes.The CS/CS@CNTs-1 composite shows the highest proton conductivity of 3.46 × 10 −2 S cmat 80°C, which is about 1.5-fold of the conductivity of pure CS membrane. Consequently, the single cell equipped with CS/CS@CNTs-1 membrane exhibits a peak power density of 47.5 mW cm −2 , which is higher than that of pure CS (36.1 mW cm −2 ).

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“…Nevertheless, proton conductivity in these membranes still rely mainly on their water contents. To overcome such barrier imposed by water dependent conduction, much work has gone into developing membrane systems that can use alternative protogenic groups including heterocyclic compounds [9,[12][13][14] and phosphorus oxoacid derivatives [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Phosphonated polyimides: Enhancement of proton conductivity at high temperatures and low humidity

Abouzari‐Lotf

Ghassemi

Mehdipour‐Ataei

et al. 2016

Journal of Membrane Science

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Anhydrous proton exchange membranes comprising of chitosan and phosphorylated graphene oxide for elevated temperature fuel cells

Cited by 109 publications

References 61 publications

Fully scalable one-pot method for the production of phosphonic graphene derivatives

Fully scalable one-pot method for the production of phosphonic graphene derivatives

Chitosan‐based composite membranes containing chitosan‐coated carbon nanotubes for polymer electrolyte membranes

Phosphonated polyimides: Enhancement of proton conductivity at high temperatures and low humidity

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