A universal strategy towards porous carbons with ultrahigh specific surface area for high-performance symmetric supercapacitor applications

Liang, Honghuo; Sun, Tao; Xu, Lang; Sun, Chaoying; Wang, Dewei

doi:10.1007/s10854-019-01733-y

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…h-PC-2 SC / 12.95 Wh•kg −1 @250 W kg −1 6 m KOH [38] PPC ASC 257 F g −1 @10 A g −1 12.4 Wh•kg −1 @25.1 W kg −1 1 m ZnSO 4 [39] EDTA-3K ASC 264 F g −1 @1 A g −1 200 Wh•kg −1 @20.11 W kg −1 6 m KOH [40] CU-800 ASC 340.7 F g −1 @0.1 A g −1 6400 Wh kg −1 @30 W kg…”

Section: Mb/cr Adsorptionunclassified

In Situ Synthesis of Rare‐Earth Hybridized Functional Core‐Shell Architectures from Microporous Salt Templates and Capacitance‐Adsorption Correlation Mechanisms

Zheng,

Guo

2024

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Biochar Porous Carbon (BPC) has become a research hotspot in the fields of energy storage, conversion, catalysis, adsorption, and separation engineering. However, the key problem of pore structure liable to collapse has not yet been addressed effectively. Here, an innovative salt ionic coordination modulation technique is reported to synthesize a new core‐shell structure of BPC (Dual‐doped porous carbonaceous materials, RHPC3@LaYO3) by the asymmetric load of the f orbital ion, which prevents pore structural collapse. The result shows that the novel asymmetric supercapacitors (ASCs) with an excellent energy density (193.11 Wh·kg−1) and capacitance (267.14 F·g−1) by assembling the prepared porous BPC carrier and RHPC3@LaYO3, which surpass the typical supercapacitor. In order to elucidate the association between adsorption and capacitance, the adsorption coexistence equation (MACE) is constructed with the aim of providing a comprehensive explanation for the mechanism of single‐multilayer adsorption. Furthermore, a specific linkage mechanism is discovered using adsorption/ desorption properties to validate the pros/cons of capacitive properties. These results demonstrate the potential of renewable biomass materials as ASCs, which can provide new ideas for the construction of an evaluation approach for the performance of future efficient multi‐reaction energy storage devices.

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Section: Mb/cr Adsorptionunclassified

In Situ Synthesis of Rare‐Earth Hybridized Functional Core‐Shell Architectures from Microporous Salt Templates and Capacitance‐Adsorption Correlation Mechanisms

Zheng,

Guo

2024

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When High‐Temperature Cesium Chemistry Meets Self‐Templating: Metal Acetates as Building Blocks of Unusual Highly Porous Carbons

Kossmann

Zeng

et al. 2023

Angewandte Chemie

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Self-templating is a facile strategy for synthesizing porous carbons by direct pyrolysis of organic metal salts. However, the method typically suffers from low yields (< 4%) and limited specific surface areas (SSA < 2000 m 2 g À 1 ) originating from low activity of metal cations (e.g., K + or Na + ) in promoting construction and activation of carbon frameworks. Here we use cesium acetate as the only precursor of oxo-carbons with large SSA of the order of 3000 m 2 g À 1 , pore volume approaching 2 cm 3 g À 1 , tunable oxygen contents, and yields of up to 15 %. We unravel the role of Cs + as an efficient promoter of framework formation, templating and etching agent, while acetates act as carbon/oxygen sources of carbonaceous frameworks. The oxo-carbons show record-high CO 2 uptake of 8.71 mmol g À 1 and an ultimate specific capacitance of 313 F g À 1 in the supercapacitor. This study helps to understand and rationally tailor the materials design by a still rare organic solidstate chemistry.

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When High‐Temperature Cesium Chemistry Meets Self‐Templating: Metal Acetates as Building Blocks of Unusual Highly Porous Carbons

Kossmann

Zeng

et al. 2023

Angew Chem Int Ed

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Self‐templating is a facile strategy for synthesizing porous carbons by direct pyrolysis of organic metal salts. However, the method typically suffers from low yields (<4%) and limited specific surface areas (SSA<2000 m2 g−1) originating from low activity of metal cations (e.g., K+ or Na+) in promoting construction and activation of carbon frameworks. Here we use cesium acetate as the only precursor of oxo‐carbons with large SSA of the order of 3000 m2 g−1, pore volume approaching 2 cm3 g−1, tunable oxygen contents, and yields of up to 15 %. We unravel the role of Cs+ as an efficient promoter of framework formation, templating and etching agent, while acetates act as carbon/oxygen sources of carbonaceous frameworks. The oxo‐carbons show record‐high CO2 uptake of 8.71 mmol g−1 and an ultimate specific capacitance of 313 F g−1 in the supercapacitor. This study helps to understand and rationally tailor the materials design by a still rare organic solid‐state chemistry.

show abstract

A universal strategy towards porous carbons with ultrahigh specific surface area for high-performance symmetric supercapacitor applications

Cited by 5 publications

References 48 publications

In Situ Synthesis of Rare‐Earth Hybridized Functional Core‐Shell Architectures from Microporous Salt Templates and Capacitance‐Adsorption Correlation Mechanisms

In Situ Synthesis of Rare‐Earth Hybridized Functional Core‐Shell Architectures from Microporous Salt Templates and Capacitance‐Adsorption Correlation Mechanisms

When High‐Temperature Cesium Chemistry Meets Self‐Templating: Metal Acetates as Building Blocks of Unusual Highly Porous Carbons

When High‐Temperature Cesium Chemistry Meets Self‐Templating: Metal Acetates as Building Blocks of Unusual Highly Porous Carbons

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