Pyrolyzed polyaniline and graphene nano sheet composite with improved rate and cycle performance for lithium storage

Zhu, Biyu; Deng, Zhuo; Yang, Wanli; Wang, Haibo; Gao, Li

doi:10.1016/j.carbon.2015.05.051

Cited by 21 publications

(11 citation statements)

References 37 publications

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“…R SEI values were also lower in modified electrodes than PGE indicating formation of more conductive graphene layers on the PGE surface during the modification process (Table ) . The capacitances of modified electrodes were increased with the modification of chlorine doping and forming graphene according to the CPE1 and CPE2 which were higher in Cl‐GPGEs and Cl‐GO than PGE . Capacitive behavior of an electrodes can be determined by determination of the phase angle at low frequencies which was highest in Cl‐GPGE1 indicating the highest capacitive property (Table ) .…”

Section: Resultsmentioning

confidence: 99%

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

2018

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Summary One‐step electrochemical preparation of chlorine doped graphene coated electrodes was succeed by cyclic voltammetric method for the first time in the literature in this work. Because hetero atom and oxygen functional groups doped graphene‐based electrodes can improve the electrochemical performance of the battery with formed defects sides on the main structure of the electrodes, the modification of graphene‐based electrodes by chlorine and oxygen including functional groups such as ―Cl, ―ClO4, ―ClO3, ―OH, and ―C═O have been done by arranging of scanned potential in cyclic voltammetric treatment. The structural features of chlorine doped graphene electrodes were analyzed by scanning electron microscopic analysis. Chemical structures of the surface of the electrodes were elucidated by X‐ray photoelectron spectroscopy. Raman analyses were carried out to determine the optical properties of the electrodes. Chlorine doped graphene‐based electrodes were also used as positive electrode component of a vanadium redox battery for the first time in the literature. The electrodes showed great electrochemical performance as positive electrode materials of the battery.

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Section: Resultsmentioning

confidence: 99%

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

2018

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“…40,41 Furthermore, the peak at 44°corresponded to the graphitic (100) crystal plane. 42 Raman spectroscopy was employed to reveal the quality of graphitic structure of carbon samples. As shown in Figure 3F, two major bands appeared in the 500−2500 cm −1 region, including the D band at 1344 cm −1 and the G band at 1595 cm −1 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The insertion of O and/or N caused changes in the reacting carbon atoms. The out of planar C–N or C–O covalent bonds resulted in the atomic scale roughness and thus increased the distance between graphene layers. , Furthermore, the peak at 44° corresponded to the graphitic (100) crystal plane …”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Self-Standing Hierarchical Porous Nitrogen-Doped Carbon Fibers for Supercapacitors from Plant Protein–Lignin Electrospun Fibers

Wang

Luo

2018

ACS Omega

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This research aims to develop self-standing nitrogen-doped carbon fiber networks from plant protein–lignin electrospun fibrous mats for supercapacitors. The challenge in preparing carbon fiber from protein is to maintain a fibrous structure during carbonization process. Thus, lignin was incorporated with protein. At protein-to-lignin ratio of 50:50 to 20:80, the electrospun fibers maintained their structure after carbonization and formed self-standing carbon fiber mats. Stacked graphene layer structure was developed in the carbon fibers at a relatively low carbonization temperature (<1000 °C) without the use of catalysts, which might be derived from both lignin and protein. Graphene layer structure conferred the carbon fibers with superior conductivity. The optimized carbon fiber networks possessed excellent capacitance performance in 6 M KOH of 410 F/g at 1 A/g and good cyclic stability. Such good electrochemical properties were due to the well-engineered characteristics of the materials, including a hierarchical porous texture, heteroatoms (nitrogen and oxygen), and the stacked graphene layer structure. This research not only has provided a convenient way to develop carbon fibers from plant protein−lignin for N-doped supercapacitor electrodes, but also opportunity to add value to plant proteins and lignin as by-products of agricultural industry processing.

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“…Nitrogen‐doped carbon coating layer obtained by pyrolysis of polyaniline is commonly used to improve the redox kinetics and restricted capacity by increasing the partial charges on carbon and nitrogen, avoiding the direct electrolyte access and providing a faradic capacitance . As a result, the pyrolyzed polyaniline graphene nanosheets (PAGNS) composite showed improved coulombic efficiency and cycle stability with a high capacity of 282 mAh g −1 at 1.6 A g −1 after 500 cycles at 50 °C compared with the pure graphene nanosheets …”

Section: Applications Of Pyrolytic Polyanilinementioning

confidence: 99%

Applications of Pyrolytic Polyaniline for Renewable Energy Storage

Luo

Guo

et al. 2018

ChemElectroChem

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A large number of studies have shown that nitrogen‐doped carbon can effectively improve the electrochemical performance of renewable energy storage devices. Polyaniline, as a carbon precursor rich in nitrogen heteroatoms, can be pyrolyzed to introduce a high content of structural nitrogen atoms into the carbon skeleton to fundamentally change the global properties of carbon materials including physical properties (e. g. surface polarity, electric conductivity, and wettability) and chemical properties (e. g. basicity and additional pseudocapacitance). Thus, nitrogen doping is extensively applied in the field of Li‐ion batteries, Li‐sulfur batteries, and supercapacitors to obtain excellent performance. Doping with different kinds of nitrogen configurations (e. g. pyridinic N, pyrrolic N, and graphitic N) shows respective mechanisms for the electrode materials of different energy storage devices. These mechanisms and applications of pyrolytic polyaniline in Li‐ion batteries, Li‐sulfur batteries, and supercapacitors are illustrated in detail here.

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Pyrolyzed polyaniline and graphene nano sheet composite with improved rate and cycle performance for lithium storage

Cited by 21 publications

References 37 publications

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

Facile Preparation of Self-Standing Hierarchical Porous Nitrogen-Doped Carbon Fibers for Supercapacitors from Plant Protein–Lignin Electrospun Fibers

Applications of Pyrolytic Polyaniline for Renewable Energy Storage

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