Core-shell structured carbon nanofibers yarn@polypyrrole@graphene for high performance all-solid-state fiber supercapacitors

Chen, Long; Li, Deping; Chen, Lina; Si, Pengchao; Feng, Jinkui; Zhang, Lin; Li, Yanhui; Lou, Jun; Ci, Lijie

doi:10.1016/j.carbon.2018.06.022

Cited by 117 publications

(48 citation statements)

References 38 publications

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“…[13] Unfortunately, PANI suffers from continuous expansion and shrinkage during ion doping and dedoping process. [14] Generally, the PANI/carbon composite materials, such as PANI/carbon fibers, [15] PANI/carbon nanotubes, [16] and PANI/graphene [17] are adopted to improve cyclic stability of PANI since carbon materials have high surface area, excellent structural stability, and high connectivity. The capacitance retention of PANI after 1000 cycles is usually below 50%, which limits the practical application of PANI in the field of energy storage.…”

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confidence: 99%

Electrochemical Performance of Manganese Coordinated Polyaniline

Chen

Xie

2019

Adv Elect Materials

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Manganese (II) coordinated polyaniline (PANI‐Mn) is designed as an energy‐storage electrode to improve electrochemical cycling stability of conductive polymer‐based supercapacitors. A PANI‐Mn electrode is synthesized through electro‐polymerization and hydrothermal coordination processes. A tetrahedron coordination structure is formed between manganese (II) dichloride and neighboring imino nitrogen to enforce the bonding strength of conjoint aniline units, restraining excessive volume expansion of the PANI molecule chain. Specific capacitance is enhanced from 350 F g−1 of PANI to 810 F g−1 of PANI‐Mn at 1 A g−1. Cycling capacitance retention is improved from 61% of PANI to 88% of PANI‐Mn at 5 A g−1 for 1000 cycles. PANI‐Mn shows larger response current than PANI at the same potential. First principle calculations prove that PANIs‐Mn exhibits higher density of state at Fermi level than PANI. The conjugated electron delocalization is strengthened in transitional metal‐coordinated conductive polymer, causing the improved conductivity of PANI‐Mn. Furthermore, an all‐solid‐state symmetric supercapacitor based on a PANI‐Mn electrode exhibits an energy density of 51.38 Wh kg−1 at a power density of 850 W kg−1 and a considerable cycling life of 82% after 1000 cycles at 5 A g−1. PANI‐Mn coordination polymer exhibits enhanced electrochemical stability, thus showing promise for energy storage application.

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confidence: 99%

Electrochemical Performance of Manganese Coordinated Polyaniline

Chen

Xie

2019

Adv Elect Materials

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“…PANI-coated C/CNTs fibers are able to retain 98% of the initial capacitance even after 2000 cycles at a current density of 10 A/g [185]. Outstanding stability (86% capacitance retention after 10000 cycles) and excellent flexibility (but associated to much lower specific capacitance values (~93 F/g)) has been reported by Chen et al [186] for fiber-shaped all-solid-state supercapacitors fabricated, as shown in Figure 23, by using a binder-free carbon nanofibers yarn (CNY) with a core-shell structure (Figure 23e). CNY has been prepared by At the same rate, much higher specific capacitance (1119 F/g) has been obtained by Agyemang et al [185] by coating CNT-enriched carbon fibers (produced by stabilization and carbonization of as-spun PAN/CNTs fibers under conditions reported in Table S5) with aniline monomer, through in situ chemical polymerization, to form PANI-coated C/CNTs fibers (Figure 22).…”

Section: Supercapacitorsmentioning

confidence: 61%

“…PANI-coated C/CNTs fibers are able to retain 98% of the initial capacitance even after 2000 cycles at a current density of 10 A/g [185]. Outstanding stability (86% capacitance retention after 10000 cycles) and excellent flexibility (but associated to much lower specific capacitance values (~93 F/g)) has been reported by Chen et al [186] for fiber-shaped all-solid-state supercapacitors fabricated, as shown in Figure 23, by using a binder-free carbon nanofibers yarn (CNY) with a core-shell structure (Figure 23e). CNY has been prepared by Outstanding stability (86% capacitance retention after 10000 cycles) and excellent flexibility (but associated to much lower specific capacitance values (~93 F/g)) has been reported by Chen et al [186] for fiber-shaped all-solid-state supercapacitors fabricated, as shown in Figure 23, by using a binder-free carbon nanofibers yarn (CNY) with a core-shell structure (Figure 23e).…”

Section: Supercapacitorsmentioning

confidence: 61%

“…Table S5 reports some examples of electrode ENMs and their preparation conditions; the main parameters describing their performance are reported in Table S6. PAN [181][182][183][184][185][186][187] or a blend of PAN and PVP [52][53][54]59] is the most frequently utilized polymeric component of the spinnable solution, whereas N,N-dimethylformamide (DMF) commonly acts as a solvent [52][53][54]59,[181][182][183][184][185][186][187]. A variety of different additives is employed to generate carbon fibers with specific textural, compositional, or conductive properties [46,47,59,178,[182][183][184][185][186][187].…”

Section: Supercapacitorsmentioning

confidence: 99%

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Electrospun Nanomaterials for Energy Applications: Recent Advances

Santangelo

2019

Applied Sciences

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Electrospinning is a simple, versatile, cost-effective, and scalable technique for the growth of highly porous nanofibers. These nanostructures, featured by high aspect ratio, may exhibit a large variety of different sizes, morphologies, composition, and physicochemical properties. By proper post-spinning heat treatment(s), self-standing fibrous mats can also be produced. Large surface area and high porosity make electrospun nanomaterials (both fibers and three-dimensional fiber networks) particularly suitable to numerous energy-related applications. Relevant results and recent advances achieved by their use in rechargeable lithium- and sodium-ion batteries, redox flow batteries, metal-air batteries, supercapacitors, reactors for water desalination via capacitive deionization and for hydrogen production by water splitting, as well as nanogenerators for energy harvesting, and textiles for energy saving will be presented and the future prospects for the large-scale application of electrospun nanomaterials will be discussed.

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“…According to CV curves in Figure b, two distinct peaks attributed to the transition between multiple redox states of PANI materials . GCD curves of the two devices are tested at 1 A g −1 under 0.8 V in Figure c for comparison of their capacities.…”

Section: Resultsmentioning

confidence: 99%

Electrospun Polyaniline Nanofiber Networks toward High‐Performance Flexible Supercapacitors

Lü

Chen

2019

Adv Materials Technologies

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competitive for flexible devices. [10][11][12] Conductive polymers-based electrodes present good mechanical properties owning to the intrinsic flexibility of polymer chains, but show inferior energy capacity because of the bulk structure with limited surface area for ion storage and electrical conductivity for charge transfer. [13][14][15] Considering intrinsic flexibility and cost effectivity of conducting polymers, optimizing their structures and performances shows potential for practical applications. Thus, it is promising to develop an effective structure control strategy to improve charge storage and transfer properties of conductive polymers for flexible supercapacitors.1D nanomaterials, including nanowires, nanofibers, nanorods, and nanotubes, are recognized as promising electrode materials for flexible supercapacitors. [16,17] Comparing to bulk structure materials, the 1D nanomaterials exhibit higher surface area, controllable pore width, better electrical conductivity, and stress tolerance properties. [18,19] First, the large surface area not only enlarge electrode and electrolyte contact area but also improves ion storage capability within electrode by electrical double-layer mechanism. Second, the orientated electron and ion transport within 1D structure facilitate fast electrochemical dynamics and thus provide good rate capability of devices. Third, the enhanced flexibility offers strong tolerance to tough and continuous external deformations without obvious performance degradation of supercapacitors. Up to now, there are several synthetic methods for 1D nanomaterials, such as electrospinning method, solution-phase method, and templateassisted method. [20][21][22] Among these techniques, electrospinning method is a versatile top-down strategy for fabricating 1D nanomaterials with dimensions from nanometer to micrometer scale by electrostatic forces. [23] The subsequent experimental parameters, including temperature, repelling rate, and spinning time, are greatly significant for obtaining high-quality fiber nanomaterials. [24,25] Therefore, it is an urgent demand to fabricate 1D nanofiber materials-based electrodes with combination of conductive polymers and electrospinning technique for flexible supercapacitors.There are some previous works on polyaniline for supercapacitor applications, such as polyaniline web electrode, [26] polyaniline/carbon nanotube composite, [27] and hollow structural polyaniline electrode. [28] These materials electrodes all display Flexible supercapacitors with merits of lightweight, flexibility, and large power density are promising energy storage candidates for portable and wearable electronic devices. Flexibility of electrode materials is critical to their performance, which can be optimized by the screening of soft materials and an effective morphology control strategy. Here, polyaniline (polyacrylonitrile (PANI)) nanofiber networks through a simple electrospinning method are reported, with superior mechanical and electrochemical properties for flexible supercapacitors. T...

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Core-shell structured carbon nanofibers yarn@polypyrrole@graphene for high performance all-solid-state fiber supercapacitors

Cited by 117 publications

References 38 publications

Electrochemical Performance of Manganese Coordinated Polyaniline

Electrochemical Performance of Manganese Coordinated Polyaniline

Electrospun Nanomaterials for Energy Applications: Recent Advances

Electrospun Polyaniline Nanofiber Networks toward High‐Performance Flexible Supercapacitors

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