Optimized mesopores enabling enhanced rate performance in novel ultrahigh surface area meso-/microporous carbon for supercapacitors

Yang, Jie; Wu, Hao‐Lin; Zhu, Min; Ren, Wenju; Lin, Yuan; Chen, Haibiao; Pan, Feng

doi:10.1016/j.nanoen.2017.02.007

Cited by 224 publications

(79 citation statements)

References 70 publications

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“…By contrast, the freestanding HPC‐based electrodes and powder HPC‐based electrodes both exhibit inferior electrochemical performance due to the limited conducting pathways (Figure 4F; Figure S20, Supporting Information). Importantly, these capacitive characteristics above for NF‐HPC based supercapacitors are also very competitive to the reports of other porous carbon based electrodes, and some of recent results are listed in Table 1 . Figure G further presents the Ragone plot of the device deriving from GCD curves.…”

Section: Resultsmentioning

confidence: 76%

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Miao

Lü

Zhang

et al. 2019

Adv Funct Materials

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Hierarchical porous materials (HPM) have been widely used to enhance electrochemical performance in different fields of application, since their porous structures benefit electrolyte infiltration and ion diffusion. However, the realization of multidimension-controllable synthesis of HPM, including material category, material components, supporting substrates, as well as pore sizes/ distributions, is still a huge challenge. Herein, a novel concept is proposed, for the first time, on the geometry structure of HPM bioinspired by natural ant nests, which features 3D interlaced and well-interconnected porous structures. Moreover, a facile and universal approach is developed to the multidimensioncontrollable synthesis of ant nest-structural HPM. Further investigation shows that the in situ construction of carbon-based ant nests onto porous current collectors to fabricate the integrated electrode for supercapacitors could induce nearly 70% and 45% enhancement on the specific capacitance compared to the common powder and freestanding materials, respectively. Moreover, this synthesis route can be facilely extended to obtain the ant neststructural CuO x , which exhibits fivefold enhancement in sensitivity for glucose detection. Such biomimetic hierarchical porous architectures are of great significance in the field of electrochemical applications.

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Section: Resultsmentioning

confidence: 76%

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Miao

Lü

Zhang

et al. 2019

Adv Funct Materials

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“…Notably,t he high rate-capacitance retentions are better for the AC meso cells. The AC meso electrode with al arger pore size provided easier pathways for ion transport, [38,39] which is favorable for fast doublelayer charging and discharging.…”

Section: Emi][fsi] > [Pmp][fsi] > [Bmp][fsi] > [Emi]bf 4 > [Emi][tfsi]mentioning

confidence: 99%

Supercapacitive Properties of Micropore‐ and Mesopore‐Rich Activated Carbon in Ionic‐Liquid Electrolytes with Various Constituent Ions

et al. 2019

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Ionic‐liquid (IL) electrolytes, characterized by large potential windows, intrinsic ionic conductivity, low environmental hazard, and high safety, are used for micropore‐ and mesopore‐rich activated‐carbon (ACmicro and ACmeso) supercapacitors. IL electrolytes consisting of various cations [1‐ethyl‐3‐methylimidazolium (EMI+), N‐propyl‐N‐methylpyrrolidinium (PMP+), and N‐butyl‐N‐methylpyrrolidinium (BMP+)] and various anions [bis(trifluoromethylsulfonyl)imide (TFSI−), BF4−, and bis(fluorosulfonyl)imide (FSI−)] are investigated. The electrolyte conductivity, viscosity, and ion transport properties at the ACmicro and ACmeso electrodes are studied. In addition, the capacitance, rate capability, and cycling stability of the two types of AC electrodes are systematically examined and post‐mortem material analyses are conducted. The effects of IL composition on the charge–discharge capacitances of the ACmicro electrodes are more pronounced than those for the ACmeso electrodes. The FSI‐based IL electrolytes, for which electrochemical properties are cation dependent, are found to be promising. Incorporating EMI+ with FSI− results in a low electrolyte viscosity and a fast ion transport, giving rise to optimized electrode capacitance and rate capability. Replacing EMI+ with PMP+ increases the cell voltage (to 3.5 V) and maximum energy density (to 42 Wh kg−1) of the ACmicro cell at the cost of cycling stability.

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“…[4,5] Typical ASCs incorporate electrodes fabricated with iron-containing oxides (such as Fe 2 O 3 ,F e 3 O 4 ,Z nFe 2 O 4 ,a nd NiFe 2 O 4 )a se lectrode mate-rials, [6][7][8][9] which show high capacitance and energy density values, butthese metal oxidesusually have poor electrical conductivity anda re hydrophobic in nature. [10] Syntheticc arbon based materials, such as carbon nanotubes (CNTs), [11] graphene oxide, [12] graphene, [13] polymerderived carbons, [14][15][16] and metal-organic framework (MOF)-derived carbon, [17] are most studied as promisinge lectrode materials in SC applications. [10] Syntheticc arbon based materials, such as carbon nanotubes (CNTs), [11] graphene oxide, [12] graphene, [13] polymerderived carbons, [14][15][16] and metal-organic framework (MOF)-derived carbon, [17] are most studied as promisinge lectrode materials in SC applications.…”

Section: Introductionmentioning

confidence: 99%

“…[10] Therefore, in the last few years, metal oxide nanocomposites that combine metal oxidesa nd highlyc onducting carbon materials have been explored to improvee lectrical conductivity and energy density. [10] Syntheticc arbon based materials, such as carbon nanotubes (CNTs), [11] graphene oxide, [12] graphene, [13] polymerderived carbons, [14][15][16] and metal-organic framework (MOF)-derived carbon, [17] are most studied as promisinge lectrode materials in SC applications. Activated carbons (ACs) are, however, considered as the primary option for EDLCs, because of their low cost, high electrical conductivity,a nd porousn ature.…”

Section: Introductionmentioning

confidence: 99%

Utilizing Waste Thermocol Sheets and Rusted Iron Wires to Fabricate Carbon–Fe₃O₄ Nanocomposite‐Based Supercapacitors: Turning Wastes into Value‐Added Materials

Vadiyar

Liu

2018

ChemSusChem

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The synthesis of porous activated carbon (specific surface area=1883 m g ), Fe O nanoparticles, and carbon-Fe O (C-Fe O ) nanocomposites from local waste thermocol sheets and rusted iron wires is demonstrated herein. The resulting carbon, Fe O nanoparticles, and C-Fe O composites are used as electrode materials for supercapacitor applications. In particular, C-Fe O composite electrodes exhibit a high specific capacitance of 1375 F g at 1 A g and longer cyclic stability with 98 % capacitance retention over 10 000 cycles. Subsequently, an asymmetric supercapacitor, namely, C-Fe O ∥Ni(OH) /carbon nanotube device, exhibits a high energy density of 91.1 Wh kg and a remarkable cyclic stability, with 98 % capacitance retention over 10 000 cycles. Thus, this work has important implications not only for the fabrication of low-cost electrodes for high-performance supercapacitors, but also for the recycling of waste thermocol sheets and rusted iron wires for value-added reuse.

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Optimized mesopores enabling enhanced rate performance in novel ultrahigh surface area meso-/microporous carbon for supercapacitors

Cited by 224 publications

References 70 publications

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Supercapacitive Properties of Micropore‐ and Mesopore‐Rich Activated Carbon in Ionic‐Liquid Electrolytes with Various Constituent Ions

Utilizing Waste Thermocol Sheets and Rusted Iron Wires to Fabricate Carbon–Fe₃O₄ Nanocomposite‐Based Supercapacitors: Turning Wastes into Value‐Added Materials

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Optimized mesopores enabling enhanced rate performance in novel ultrahigh surface area meso-/microporous carbon for supercapacitors

Cited by 224 publications

References 70 publications

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Multidimension‐Controllable Synthesis of Ant Nest‐Structural Electrode Materials with Unique 3D Hierarchical Porous Features toward Electrochemical Applications

Supercapacitive Properties of Micropore‐ and Mesopore‐Rich Activated Carbon in Ionic‐Liquid Electrolytes with Various Constituent Ions

Utilizing Waste Thermocol Sheets and Rusted Iron Wires to Fabricate Carbon–Fe3O4 Nanocomposite‐Based Supercapacitors: Turning Wastes into Value‐Added Materials

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Utilizing Waste Thermocol Sheets and Rusted Iron Wires to Fabricate Carbon–Fe₃O₄ Nanocomposite‐Based Supercapacitors: Turning Wastes into Value‐Added Materials