Facile assembly of a S@carbon nanotubes/polyaniline/graphene composite for lithium–sulfur batteries

Deng, Huihui; Yao, Libing; Huang, Qiu‐An; Su, Qingmei; Zhang, Jun; Zhang, Fumin; Du, Gaohui

doi:10.1039/c6ra28288a

Cited by 66 publications

(35 citation statements)

References 44 publications

(42 reference statements)

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“…For BN/CNT/PANI, an additional peaks at 400.2 eV has been appeared due to the C−N bonding (Figure c). Figure d represents the deconvoluted C 1s spectrum of BN/CNT/PANI, which shows the presence of C=C (∼284.2 eV), C−N (∼285.6 eV), C−O (∼286.5 eV) and C=O (∼287.5 eV) bonds ,. But the C=C bond energy has been decreased from its ideal value, which may be attributed to the interaction of п‐electron of CNT with PANI.…”

Section: Resultsmentioning

confidence: 99%

Boron Nitride based Ternary Nanocomposites with Different Carbonaceous Materials Decorated by Polyaniline for Supercapacitor Application

et al. 2019

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In this article, we have emphasized on the utilization of hexagonal BN (a 2D material) for supercapacitor application in combination with various carbonaceous materials (GO, RGO, CNT) and polyaniline (PANI). The formation of composite as well as interaction between the individual components in the ternary composites was confirmed by UV, FTIR, and XRD analysis. The morphological analysis established the uniform deposition of polyaniline nanofibers on the exfoliated BN and carbonaceous materials. Among the ternary nanohybrids, BN/ CNT/PANI composite exhibited highest specific capacitance of 387.5 Fg À 1 at a current density of 1 Ag À 1 in 1 M KCl. The ternary composite also achieved a high energy density of 34.44 Whkg À 1 at a power density of 400 Wkg À 1 . Further, the ternary nanohybrid BN/CNT/PANI retained 87% of specific capacitance after 6000 charging disharging cycles. All these superior electrochemical properties demonstrates potentiality of BN/ CNT/PANI for supercapacitors.[a] C.

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Section: Resultsmentioning

confidence: 99%

Boron Nitride based Ternary Nanocomposites with Different Carbonaceous Materials Decorated by Polyaniline for Supercapacitor Application

et al. 2019

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“…On the other hand, a broad peak from 398 to 403 eV corresponding to quinoid amine (N−), benzenoid imine (−N−), and positively charged nitrogen (N + ) PANi is observed for ET‐Se/C/aniline. [ 41–44 ] Previous research has demonstrated that these N functional groups are capable of adsorbing polychalcogenides. [ 33 ] The morphological studies clearly show the formation of PANi in ET‐Se/C/aniline (Figure 2d–g).…”

Section: Resultsmentioning

confidence: 99%

In Batteria Electrochemical Polymerization to Form a Protective Conducting Layer on Se/C Cathodes for High‐Performance Li–Se Batteries

Lee

et al. 2020

Adv Funct Materials

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The lithium–selenium (Li–Se) battery is a promising energy storage system for portable devices owing to its high energy density (2528 Wh L−1) and electrical conductivity (10−3 S m−1). The main issue with Li–Se batteries is their poor stability originating from the dissolution of Se‐containing compounds. Hence, many studies have focused on the immobilization of Se using protective layers prepared via ex situ or in situ approaches. However, these strategies are too complicated and costly for practical use. Herein, a facile in batteria electrochemical treatment to form a protective conductive layer on a Se‐based cathode is introduced. Specifically, aniline monomers added to an assembled Li–Se cell are polymerized into electrically conductive polyaniline. The treated Li–Se cell exhibits 40% higher capacity retention compared to untreated one. Moreover, at a high rate (4 C), the treated cell maintains a capacity of 1538 mAh cm−3, whereas the untreated cell exhibits no capacity. The enhanced cyclic stability and rate capability are attributed to the electrochemical formation of a uniform, ultrathin (≤10 nm) polyaniline layer, to confine lithium polyselenides with its C−N bonds, and improve ionic conductivity by self‐doping with lithium salts to form delocalized polaron lattice in the polyaniline.

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“…Figure 4b shows the binding energies at 164.2, 165.4, and 168.7 eV which are assigned to S 2p3/2, S 2p1/2 and sulfate, respectively. [24,25] The XPS spectrum of the C 1s is fitted into three peaks at 285, 287, and 289 eV, which correspond to the CÀ C, CÀ N, and C=C, respectively. [26] Figure 4d shows the high-resolution spectrum of N 1s.…”

Section: Resultsmentioning

confidence: 99%

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

et al. 2019

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High energy density Li−S battery has attracted wide attention because of its promising application in long driving‐range electric vehicles. However, the shuttle effect of polysulfides, electrical insulation and volume‐change of sulfur, remain great challenges. Herein, inspired from a natural mimosa pudica structure, we present a novel nanocomposite which consists of a mimosa pudica‐structured carbon matrix coating with sulfur. The biomimetic configuration is able to structurally‐respond to the volume‐change of sulfur during charge/discharge; and the carbon matrix provides a good conductivity for rapid electron transfer. The carbon/sulfur composite‐based Li−S batteries exhibit a good electrochemical performance including a stable capacity after 1000 cycles, along with a Coulombic efficiency as high as 99.6 %, and an excellent rate‐performance even after three rounds of measurements. In addition, the density function theory modeling is investigated, which confirms the adsorption effect of carbon towards the polysulfides including Li2S4, Li2S6, and Li2S8, enabling a long‐term cycling stability.

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Facile assembly of a S@carbon nanotubes/polyaniline/graphene composite for lithium–sulfur batteries

Abstract: A carbon nanotube/polyaniline/graphene composite has been prepared to enhance the electrochemical performance of lithium–sulfur batteries.

Cited by 66 publications

References 44 publications

Boron Nitride based Ternary Nanocomposites with Different Carbonaceous Materials Decorated by Polyaniline for Supercapacitor Application

Boron Nitride based Ternary Nanocomposites with Different Carbonaceous Materials Decorated by Polyaniline for Supercapacitor Application

In Batteria Electrochemical Polymerization to Form a Protective Conducting Layer on Se/C Cathodes for High‐Performance Li–Se Batteries

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

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