The oxidizability-resistance of graphite products have been studied with the addition of H3PO4 and H3BO3. A available way has been found to increase the oxidizability-resistance of graphite products. The oxidizability...The oxidizability-resistance of graphite products have been studied with the addition of H3PO4 and H3BO3. A available way has been found to increase the oxidizability-resistance of graphite products. The oxidizability-resistance of graphite products rises remarkably after treating with 1% H3PO4 and 3% H3BO3. Meanwhile, the relative princi-ple has been proposed also.展开更多
In this paper, the mechanism of corrosion between flexible graphite which is used as a sealing material and metal is in-vestigated, the anticorrosive measures are introduced, and some mordern measures which should be ...In this paper, the mechanism of corrosion between flexible graphite which is used as a sealing material and metal is in-vestigated, the anticorrosive measures are introduced, and some mordern measures which should be paid attention are provided.展开更多
Exfoliated graphite(EG)is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films(FGFs).It has been a critical challenge to energy conservation and pollution abatement f...Exfoliated graphite(EG)is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films(FGFs).It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique.Here,we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature,not involving any pollutant emission.The influence factors in the preparation process were explored,such as the amount of H_(2)SO_(4)and H_(2)O_(2),the temperature for the preparation of room temperature exfoliated graphite(RTEG).In contrast to the EG by high temperature exfoliation(HTEG),RTEG exhibits a homogeneous structure and a significantly increased volume and surface area.Moreover,EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method.Especially,FGFs fabricated by RTEG has high flexibility,thermal conductivity and electrical conductivity.It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials.展开更多
Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainabl...Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainable electrodes for lithium ion batteries. Content ratio of components and dispersion protocol were tailored in order to have theological properties suitable for a large and cheap manufacturing process as well as screen printing. The bio-sourced printed electrodes exhibit a high porosity value of 70% that limits the electrochemical performances. However, the calendering process enhances electrode performances by increasing the reversible capacity from 85 until 315 mAh/g and reducing porosity to an optimal value of 34%. Moreover the introduction of 2% w/w of monofluoro-ethylene carbonate in the electrolyte reduced their reversible capacity loss of 11% in the printed electrode.展开更多
文摘The oxidizability-resistance of graphite products have been studied with the addition of H3PO4 and H3BO3. A available way has been found to increase the oxidizability-resistance of graphite products. The oxidizability-resistance of graphite products rises remarkably after treating with 1% H3PO4 and 3% H3BO3. Meanwhile, the relative princi-ple has been proposed also.
文摘In this paper, the mechanism of corrosion between flexible graphite which is used as a sealing material and metal is in-vestigated, the anticorrosive measures are introduced, and some mordern measures which should be paid attention are provided.
文摘Exfoliated graphite(EG)is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films(FGFs).It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique.Here,we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature,not involving any pollutant emission.The influence factors in the preparation process were explored,such as the amount of H_(2)SO_(4)and H_(2)O_(2),the temperature for the preparation of room temperature exfoliated graphite(RTEG).In contrast to the EG by high temperature exfoliation(HTEG),RTEG exhibits a homogeneous structure and a significantly increased volume and surface area.Moreover,EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method.Especially,FGFs fabricated by RTEG has high flexibility,thermal conductivity and electrical conductivity.It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials.
基金partially supported by theénergies du Futur Carnot Institute(Investissements d’Avenir-grant agreement No.ANR-11-CARN-030-01)the facilities of the Tek Li Cell platform funded by the Région Rhone-Alpes(ERDF:European Regional Development Fund)
文摘Free organic solvent ink containing graphite, carboxymethyl cellulose and microfibrillated cellulose as active material, dispersing and binder, respectively, has been formulated to produce flexible and eco- sustainable electrodes for lithium ion batteries. Content ratio of components and dispersion protocol were tailored in order to have theological properties suitable for a large and cheap manufacturing process as well as screen printing. The bio-sourced printed electrodes exhibit a high porosity value of 70% that limits the electrochemical performances. However, the calendering process enhances electrode performances by increasing the reversible capacity from 85 until 315 mAh/g and reducing porosity to an optimal value of 34%. Moreover the introduction of 2% w/w of monofluoro-ethylene carbonate in the electrolyte reduced their reversible capacity loss of 11% in the printed electrode.
