Tensile force-induced tearing and collapse of ultrathin carbon shells to surface-wrinkled grape skins for high performance supercapacitor electrodes

Zhang, Jing; Qin, Qing; Cui, Yingxue; Luo, Wenhao; Jin, Cen; Zheng, Wenjun

doi:10.1039/c7ta03113k

Cited by 23 publications

(12 citation statements)

References 40 publications

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“…The cyclic stability of ASCs was checked at 5 A g –1 ; as shown in Figure d, the as-constructed ASCs can still retain 89.5% of their initial capacitance after 50,000 cycles, exhibiting the highest durability for carbon-based ASCs in an aqueous electrolyte. ,− Furthermore, as shown in the inset of Figure d, three ASCs were serially connected to light up a yellow LED to evaluate the feasibility in practical applications. The outstanding capacitive energy storage capability of MHPC electrode materials was further demonstrated by comparing the Ragone plots of MHPC-based SCs and ASCs with other newly reported carbon-based symmetric supercapacitors (Figure e). ,− The optimized MHPC-1.75-based SCs can achieve the highest energy density of 8.6 Wh kg –1 accompanied by a power density of 245.8 W kg –1 and maintained 5.5 Wh kg –1 even at the highest power density of 10.5 kW kg –1 . What is more, the MHPC-1.75-based ASCs deliver a considerable energy density of 7.1 Wh kg –1 at 244 W kg –1 , predictably a bright application prospect.…”

Section: Resultsmentioning

confidence: 84%

Sustainable Low-Temperature Activation to Customize Pore Structure and Heteroatoms of Biomass-Derived Carbon Enabling Unprecedented Durable Supercapacitors

Qiu

Kang

Gao

et al. 2019

ACS Sustainable Chem. Eng.

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Due to the unreasonable configuration of the porous structure and heteroatoms, the heteroatom-doped hierarchical porous carbon employed in supercapacitors generally demonstrates an imbalance in durability and rate performance. Herein, we have exploited a mild and sustainable one-step activation route with KMnO4 as the activator to synthesize a nitrogen/oxygen dual-doped hierarchical porous carbon (MHPC) with quasi-ordered mesopores. The evolution mode and detailed activation mechanism of KMnO4 have been verified by an operando XRD characterization. The three-electrode measurements reveal that as-synthesized MHPCs demonstrate outstanding electrochemical performance, and further kinetic assessments disclose their surface-controlled dominant fast electrochemical kinetics. Owing to the prominent hierarchical porous structure, considerable heteroatom content, and fast electrochemical kinetics, the constructed symmetric supercapacitors exhibit a high specific capacity (255.5 F g–1 at 1 A g–1), outstanding rate performance (85% retention at 50 A g–1), and unprecedented durability (97.8% capacity retention after 100,000 cycles). Furthermore, all-solid-state symmetric supercapacitors still present high energy and power density (7.1 Wh kg–1 at 244 W kg–1) as well as a remarkable lifespan (89.5% capacitance retention over 50,000 cycles). This work has successfully exploited a new activation method to synthesize the biomass-derived carbon with a prominent hierarchical porous structure.

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Section: Resultsmentioning

confidence: 84%

Sustainable Low-Temperature Activation to Customize Pore Structure and Heteroatoms of Biomass-Derived Carbon Enabling Unprecedented Durable Supercapacitors

Qiu

Kang

Gao

et al. 2019

ACS Sustainable Chem. Eng.

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“…CV profiles of N-HPCN electrodes (Figure 6a) exhibit quasi-rectangular shapes at 10 mV s −1 , indicating a typical EDLC nature of energy storage. 75 High N dopants of N-HPCNs contribute Faradic capacitance; however, there are no redox peaks in CV curves, indicating a charge/discharge at a pseudoconstant frequency during the whole voltage range. 76 The electrode capacitance integrated from the CV profile declines as follows: N-HPCN-90-30 > N-HPCN-60-60 > N-HPCN-120-0 > N-HPCN-30-90 > N-HPCN-0-120.…”

Section: Resultsmentioning

confidence: 92%

“…Electrochemical tests were initially conducted on a three-electrode system in 6 M KOH electrolyte. CV profiles of N-HPCN electrodes (Figure a) exhibit quasi-rectangular shapes at 10 mV s –1 , indicating a typical EDLC nature of energy storage . High N dopants of N-HPCNs contribute Faradic capacitance; however, there are no redox peaks in CV curves, indicating a charge/discharge at a pseudoconstant frequency during the whole voltage range .…”

Section: Resultsmentioning

confidence: 97%

Nitrogen-Enriched Hollow Porous Carbon Nanospheres with Tailored Morphology and Microstructure for All-Solid-State Symmetric Supercapacitors

Song

Zhu

Xue

et al. 2018

ACS Appl. Energy Mater.

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We develop a straightforward and highly efficient approach to design N-enriched hollow porous carbon nanospheres (N-HPCNs) based on the self-polymerization of dopamine in mixed water/ethanol solvents. The control of the morphology, pore parameters, and nitrogen content of N-HPCNs can be effectively achieved by simple tuning of the volume ratios of water/ethanol and the amounts of the solvents. The representative N-HPCNs exhibit the characteristics of spherical and hollow geometry with a uniform diameter (∼400 nm), high surface area (1789 m 2 g −1 ), abundant ultramicropores with reasonable supermicro-and mesopores, and high-level nitrogen content (up to 6.86 wt %). N-HPCNs as supercapacitor electrodes in 6 M KOH electrolyte show outstanding electrochemical performances including a high specific capacitance (353 F g −1 at 0.5 A g −1 ), superb rate capability (214 F g −1 at 20 A g −1 ), and excellent cycling stability (91.9% capacitance retention at 1.0 A g −1 after 10,000 cycles). Furthermore, the assembled symmetric all-solid-state supercapacitor based on N-HPCN electrodes and poly(vinyl alcohol)/KOH gel electrolyte exhibits high integrated energy−power density of 10.42 W h kg −1 at 250 W kg −1 . This study provides promising prospects to design N-doped carbons with tailored morphology and microstructure for high-performance supercapacitors.

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“…Similarly, FLPC showed a longer discharge time and a larger current density than HLPC and CLPC (Figure S10). As shown in Figure 5B, FLPC displayed a capacitance of 276 F g À1 at 1 A g À1 and high retention of 66% at 100 A g À1 , which are significantly higher than those of HLPC, CLPC, and carbon shells, 43 porous carbon, 44 carbon nanocage, 45 carbon aerogel, 46 graphene. 47 The constructed supercapacitor retains 99% of its initial capacitance and an almost 100% coulombic efficiency after 20 000 cycles (Figure 5C).…”

Section: Resultsmentioning

confidence: 95%

In‐situ expansion strategy towards hierarchical mesoporous carbon: Formation mechanism and application in supercapacitors

Guo

Luo

Zhou

et al. 2022

Intl J of Energy Research

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Summary The microporous carbon with large surface area is widely used in supercapacitors. However, the sluggish ion transport kinetics drastically hampers the practical application. Herein, an efficient in‐situ expansion strategy for the preparation of hierarchically structured mesoporous carbon is developed by the pyrolysis of sodium lignosulfonate with HCOOK. Various techniques including in‐situ methods are employed and the formation mechanism of the hierarchical mesoporous structure is thus clarified. The grain refinement, crystal rearrangement and in‐situ expansion enable the formation of the unique porous carbon with a high mesoporous volume, an interconnected and hierarchical porous structure and a large ion‐accessible specific surface area. The specific capacitance and capacitance retention of the obtained sample reach 436 F g−1 (1 A g−1) and 64% at 100 A g−1 in the aqueous electrolyte in a three‐electrode system. Moreover, the obtained sample also shows a high energy density of 41.2 Wh kg−1 in a two‐electrode system using ionic liquid as electrolyte. The novel in‐situ route can be extended to the synthesis of other biomass‐based carbon materials for electrochemical applications.

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Tensile force-induced tearing and collapse of ultrathin carbon shells to surface-wrinkled grape skins for high performance supercapacitor electrodes

Abstract: Mesoporous carbon nano grape skins have been fabricated via a facile hydrothermal method. The resulting carbon nano grape skins showed excellent performance when used as supercapacitor electrode.

Cited by 23 publications

References 40 publications

Sustainable Low-Temperature Activation to Customize Pore Structure and Heteroatoms of Biomass-Derived Carbon Enabling Unprecedented Durable Supercapacitors

Sustainable Low-Temperature Activation to Customize Pore Structure and Heteroatoms of Biomass-Derived Carbon Enabling Unprecedented Durable Supercapacitors

Nitrogen-Enriched Hollow Porous Carbon Nanospheres with Tailored Morphology and Microstructure for All-Solid-State Symmetric Supercapacitors

In‐situ expansion strategy towards hierarchical mesoporous carbon: Formation mechanism and application in supercapacitors

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