In situ reduction of iron oxide with graphene for convenient synthesis of various graphene hybrids

Sun, Renhui; Zhang, Haobin; Yao, Jian; Mai, Yiu‐Wing; Yu, Zhong‐Zhen

doi:10.1016/j.carbon.2016.05.041

Cited by 14 publications

(6 citation statements)

References 57 publications

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“…However, the intercalation of FeCl 3 leads to the shift of G band from 1580 to 1621 cm –1 . , The G band returns to ∼1580 cm –1 for α-Fe 2 O 3 /FLG hybrids due to the disappearance of the charge transfer. The broad and weak band at ∼1315 cm –1 is mainly ascribed to the typical magnon scattering band of α-Fe 2 O 3 (1312 cm –1 ). ,, The defects induced by the anchored α-Fe 2 O 3 also contribute to the D band. The D band becomes even weaker and partly shifts to 1350 cm –1 for α-Fe 2 O 3 /FLG-10 hybrid, indicating the low content of α-Fe 2 O 3 and fewer defects.…”

Section: Results and Discussionmentioning

confidence: 99%

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Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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A highly efficient and continuous high-pressure homogenization (HPH) approach is developed for scalable production of graphene sheets and sandwich-structured α-FeO/graphene hybrids by liquid-phase exfoliation of stage-1 FeCl-based graphite intercalation compounds (GICs). The enlarged interlayer spacing of FeCl-GICs facilitates their efficient exfoliation to produce high-quality graphene sheets. Moreover, sandwich-structured α-FeO/few-layer graphene (FLG) hybrids are readily fabricated by thermally annealing the FeCl intercalated FLG sheets. As an anode material of Li-ion battery, α-FeO/FLG hybrid shows a satisfactory long-term cycling performance with an excellent specific capacity of 1100.5 mA h g after 350 cycles at 200 mA g. A high reversible capacity of 658.5 mA h g is achieved after 200 cycles at 1 A g and maintained without notable decay. The satisfactory cycling stability and the outstanding capability of α-FeO/FLG hybrid are attributed to its unique sandwiched structure consisting of highly conducting FLG sheets and covalently anchored α-FeO particles. Therefore, the highly efficient and scalable preparation of high-quality graphene sheets along with the excellent electrochemical properties of α-FeO/FLG hybrids makes the HPH approach promising for producing high-performance graphene-based energy storage materials.

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Section: Results and Discussionmentioning

confidence: 99%

“…The broad and weak band at ∼1315 cm −1 is mainly ascribed to the typical magnon scattering band of α-Fe 2 O 3 (1312 cm −1 ). 25,30,40 The defects induced by the anchored α-Fe 5d). 25 The O 1s XPS results further verify the formation of Fe−O (530.2 eV), C−O−Fe (531.1 eV), and Fe−OH (532.2 eV) bonds (Figure 5e).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Zhang

et al. 2017

ACS Appl. Mater. Interfaces

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“…This method and its modied form has also been used by several other groups for the synthesis of graphite oxide. [55][56][57][58][59][60] 2.3. Hofmann method: concentrated HNO 3 acid, concentrated H 2 SO 4 acid and KClO 3…”

Section: Brodie's Oxidation Methodsmentioning

confidence: 99%

Graphene oxide: strategies for synthesis, reduction and frontier applications

2016

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Till now, several innovative methods have been developed for the synthesis of graphene materials including mechanical exfoliation, epitaxial growth by chemical vapor deposition, chemical reduction of graphite oxide, liquid-phase exfoliation, arc discharge of graphite, in situ electron beam irradiation, epitaxial growth on SiC, thermal fusion, laser reduction of polymers sheets and unzipping of carbon nanotubes etc. Generally large scale graphene nanosheets are reliably synthesized utilising other forms of graphene-based novel materials, including graphene oxide (GO), exfoliated graphite oxide (by thermal and microwave), and reduced graphene oxide. The degree of GO reduction and number of graphene layers are minimized mainly by applying two approaches via chemical or thermal treatments. The promising and excellent properties together with the ease of processibility and chemical functionalization makes graphene based materials specially GO, ideal candidates for incorporation into a variety of advanced functional materials. Chemical functionalization of graphene can be easily achieved, by the introduction of various functional groups. These functional groups help to control and manipulate the graphene surfaces and help to tune the properties of the resulting hybrid materials. Importantly, graphene and its derivatives GO, have been explored in a wide range of applications, such as energy generation/storage, optical devices, electronic and photonic devices, drug delivery, clean energy, and chemical/bio sensors. In this review article, we have incorporated general introduction of GO, their synthesis, reduction and some selected frontier applications.

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“…On the other hand, Fe 3 O 4 nanoparticles connect with each other through the net‐like carbon shell, resulting in the improvement of the electron transmission efficiency. Third, at the high calcination temperature of 750 °C, the carbothermal effect urges the incomplete transformation from Fe 3 O 4 to Fe, which further increases the conductivity of the product ,…”

Section: Figurementioning

confidence: 99%

Scalable Dry Production Process of a Superior 3D Net‐Like Carbon‐Based Iron Oxide Anode Material for Lithium‐Ion Batteries

Kuai

et al. 2017

Angew Chem Int Ed

131

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Carbon-based transition-metal oxides are considered as an appropriate anode material candidate for lithium-ion batteries. Herein, a simple and scalable dry production process is developed to produce carbon-encapsulated 3D net-like FeO /C materials. The process is simply associated with the pyrolysis of a solid carbon source, such as filter paper, adsorbed with ferrite nitrate. The carbon derived from filter paper induces a carbothermal reduction to form metallic Fe, the addition of carbon and iron increase the conductivity of this material. As expected, this 3D net-like FeO /C composite delivers an excellent charge capacity of 851.3 mAh g after 50 cycles at 0.2 A g as well as high stability and rate performance of 714.7 mAh g after 300 cycles at 1 A g . Superior performance, harmlessness, low costs, and high yield may greatly stimulate the practical application of the products as anode materials in lithium-ion batteries.

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In situ reduction of iron oxide with graphene for convenient synthesis of various graphene hybrids

Cited by 14 publications

References 57 publications

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Graphene oxide: strategies for synthesis, reduction and frontier applications

Scalable Dry Production Process of a Superior 3D Net‐Like Carbon‐Based Iron Oxide Anode Material for Lithium‐Ion Batteries

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In situ reduction of iron oxide with graphene for convenient synthesis of various graphene hybrids

Cited by 14 publications

References 57 publications

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe2O3/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe2O3/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Graphene oxide: strategies for synthesis, reduction and frontier applications

Scalable Dry Production Process of a Superior 3D Net‐Like Carbon‐Based Iron Oxide Anode Material for Lithium‐Ion Batteries

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Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries

Highly Efficient High-Pressure Homogenization Approach for Scalable Production of High-Quality Graphene Sheets and Sandwich-Structured α-Fe₂O₃/Graphene Hybrids for High-Performance Lithium-Ion Batteries