Thermally induced chain orientation for improved thermal conductivity of P(VDF-TrFE) thin films

Zhao, Junnan; Tan, Aaron; Green, Peter F.

doi:10.1039/c7tc03240d

Cited by 33 publications

(34 citation statements)

References 30 publications

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“…Even at a high power density of 9357 W kg À 1 , the C-ACs-8//Fe 3 O 4 /G LIC can still deliver a high energy density of 47 Wh kg À 1 . The performance of the C-ACs-8//Fe 3 O 4 /G LICs are comparable or superior to the previously reported LICs, such as AC//LTO, [53] CNT//V 2 O 5 , [54] MWNT//α-Fe 2 O 3 /MWNT, [55] AC// LFSO, [56] AC//TiO 2 -rGO, [57] LNdMONF//black pearl carbon [58] etc (Table S2). To demonstrate the potential application, the C-ACs-8//Fe 3 O 4 /G LIC device was used to power a light-emitting diode (LED) (the inset of Figure 6c).…”

Section: Resultssupporting

confidence: 76%

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sun

Yang

et al. 2019

ChemistrySelect

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Lithium‐ion capacitor (LIC) is an advanced energy storage system due to the combination of high energy density and rapid charge–discharge capability. However, one of the challenges is to improve the specific capacitance and energy density of cathode at high power density. For activated carbon based cathode, the unique hierarchical porous structure and suitable graphitization are crucial for the improvement of the specific capacitance and energy density. Herein, a novel heating‐rate‐induced method is developed to prepare corncob‐derived activated carbons (C‐ACs) with high electrochemical performances. The as‐obtained C‐ACs possess large surface area (1154 m2 g−1), optimal hierarchical porous structure, and suitable graphitization. Particularly, optimal hierarchical porous structure contains not only the high energy storage of the micropores but also the high‐rate performance of the mesopores and macropores. The optimized C‐ACs‐8 electrode exhibits a specific capacitance of 158 F g−1 at 0.5 A g−1, exciting rate performance, and fast charge transfer capability. A lithium‐ion capacitor device based on C‐ACs‐8 cathode delivers a high energy density of 75 Wh kg−1 at power density of 562 W kg−1 and shows a long cycle life with 86.4% capacitance retention after 1000 cycles.

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Section: Resultssupporting

confidence: 76%

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sun

Yang

et al. 2019

ChemistrySelect

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“…Generally, the increase in power density leads to a reduction in energy density. [42] We noticed similar behavior with SLP-AC, but surprisingly no considerable reduction in energy density was observed with increasing power density. This reveals the stable and superior performance of SLP-AC electrodes.…”

Section: Electrochemical Measurements Using Two-electrode Cellsupporting

confidence: 71%

Sweet‐Lime‐Peels‐Derived Activated‐Carbon‐Based Electrode for Highly Efficient Supercapacitor and Flow‐Through Water Desalination

et al. 2019

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In the present work, highly porous activated carbon with an excellent surface area has been successfully synthesized from the agricultural waste product; sweet lime peels (Citrus limetta) using a facile chemical approach. The structural and morphological properties of sweet lime peels derived activated carbon (SLP‐AC) were studied using X‐ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and X‐ray photoelectron spectroscopy (XPS). Brunauer‐Emmett‐Teller (BET) surface area and pore structure were studied using nitrogen adsorption‐desorption isotherms. Electrochemical characterizations were performed in two and three electrode cell configurations using techniques like cyclic voltammetry (CV), Galvanostatic charge‐discharge (GCD) and electrochemical impedance spectroscopy (EIS) in aqueous (1 M H2SO4 and 1 M NaCl) and ionic liquid electrolytes (EMIMBF4). SLP‐AC based electrodes showed high electrochemical charge storage capacity of 421.67 F/g (at 1 A/g) along with outstanding cyclic stability up to 10000 GCD cycles. Fabricated supercapacitor device demonstrated high energy density of 45.53 Wh/kg in the ionic liquid electrolyte. SLP‐AC was also used to prepare the porous sponge electrodes to study their applicability in flow‐through electrode capacitive deionization (CDI), where it achieved the maximum electrosorption capacity of 22.8 mg/g. The electrosorption results fitted well with the Langmuir isotherm and the kinetics study indicates a pseudo‐first‐order kinetic model for the electrosorption of salt ions onto the electrodes surface. This confirms the outstanding performance of SLP‐AC as a highly stable and low‐cost electrode material for supercapacitors and water desalination applications.

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“…During the preparation of polymers, there are many ways to control the alignment of chain orientations, such as mechanical stretching, nanoscale templating, electrospinning, applying magnetic and electric field, and thermal annealing . Among them, mechanical stretching is an easy‐to‐implement and effective way to enhance the thermal conductivity of amorphous polymers.…”

Section: Manipulation Of Thermal Conductivitymentioning

confidence: 99%

Section: Manipulation Of Thermal Conductivitymentioning

confidence: 99%

“…During the preparation of polymers, there are many ways to control the alignment of chain orientations, such as mechanical stretching, [30,33,46,89,133,134] nanoscale templating, [135] electrospinning, [136] applying magnetic [137][138][139] and electric field, [140][141][142] and thermal annealing. [143] Among them, mechanical stretching is an easy-to-implement and effective way to enhance the thermal conductivity of amorphous polymers. For instance, using molecular dynamic simulations, Pal et al [133] have shown that the axial thermal conductivity of conductive polymers, PA and PANI, increases with the increase of axial stress.…”

Section: Alignment Of Chain Orientationsmentioning

confidence: 99%

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Thermal Transport in Conductive Polymer–Based Materials

Zhou

Chen

2019

Adv Funct Materials

162

106

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The demand for flexible conductive materials has motivated many recent studies on conductive polymer–based materials. However, the thermal conductivity of conductive polymers is relatively low, which may lead to serious heat dissipation problems for device applications. This review provides a summary of the fundamental principles for thermal transport in conductive polymers and their composites, and recent advancements in regulating their thermal conductivity. The thermal transport mechanisms in conductive polymer–based materials and up‐to‐date experimental approaches for measuring thermal conductivity are first summarized. Effective approaches for the regulation of thermal conductivity are then discussed. Finally, thermal‐related applications and future perspectives are given for conductive polymers and their composites.

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Thermally induced chain orientation for improved thermal conductivity of P(VDF-TrFE) thin films

Cited by 33 publications

References 30 publications

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Hierarchical Porous Activated Carbon Obtained by a Novel Heating‐Rate‐Induced Method for Lithium‐Ion Capacitor

Sweet‐Lime‐Peels‐Derived Activated‐Carbon‐Based Electrode for Highly Efficient Supercapacitor and Flow‐Through Water Desalination

Thermal Transport in Conductive Polymer–Based Materials

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