Artefact peaks of pore size distributions caused by unclosed sorption isotherm and tensile strength effect

Lai, Wende; Yang, Shuo; Jiang, Yanghui; Zhao, Fangyuan; Li, Zheng-jiong; Zaman, Bilal; Fayaz, Muhammad; Li, Xiran; Chen, Yong

doi:10.1007/s10450-020-00228-1

Cited by 32 publications

(12 citation statements)

References 65 publications

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“…As the N 2 measurements do not start in close vicinity to zero, adsorption at the lowest p/p 0 point of 10 -3 represents a cumulative value for pores smaller than the initial isotherm point. Similar disturbances of results are known for the desorption branch of DFT models for activated carbons [68]. Therefore, micropore filling in micropores below 1 nm cannot be ruled out.…”

Section: Pore Specific Model: Hs-nldftsupporting

confidence: 55%

Do you BET on routine? The reliability of N2 physisorption for the quantitative assessment of biochar’s surface area

Maziarka

Wurzer

Arauzo

et al. 2021

Chemical Engineering Journal

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Section: Pore Specific Model: Hs-nldftsupporting

confidence: 55%

Do you BET on routine? The reliability of N2 physisorption for the quantitative assessment of biochar’s surface area

Maziarka

Wurzer

Arauzo

et al. 2021

Chemical Engineering Journal

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“…To investigate the electrochemical performance of Zn and C@Zn in ZIHS, we adopted AC, prepared in‐house, [ 51 ] which can provide extremely high specific capacity, as the cathode. [ 52–55 ] Such a high‐capacity cathode may lead to more zinc ions participating in the energy‐storage process, which is favorable for us to test the stability of anode when a large amount of zinc deposition occurs. As shown in Figure 2 a,b, the pore structure details of AC are revealed by the nitrogen adsorption−desorption measurements.…”

Section: Resultsmentioning

confidence: 99%

Uniform Zn Deposition Achieved by Conductive Carbon Additive for Zn Anode in Zinc‐Ion Hybrid Supercapacitors

et al. 2021

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The nonuniform zinc nucleation process on the surface of zinc metal anodes is known to result in irreversible dendrite growth, which brings the risk of short circuit for the zinc‐ion hybrid supercapacitor (ZIHS). Herein, a conductive carbon−zinc composite anode with dense active sites is reported to achieve controllable dendrite growth. This unique modified anode in the ZIHS enables extremely low polarization (47 mV) in the symmetric battery test and delivers excellent application performance (capacity retention of 97.7% for 10 000 cycles). In addition, the changes in crystallographic orientation and morphological characteristics of the zinc electrode during deposition are observed by ex situ analysis. The improved zinc nucleation pattern of the modified anode verifies that the carbon additive can significantly facilitate isotropy in Zn deposition. Such a successful application of this economic and expandable modification strategy shows that carbon additives have significant potential in improving the stability of the anode.

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“…Therefore, the concept of carrying out a new original series of analyses using more advanced and reliable methods of porous structure analysis, i.e., QSDFT [42][43][44][45] and the LBET [46][47][48][49][50] methods, taking into account, among other things, surface heterogeneity.…”

Section: Methodsmentioning

confidence: 99%

“…In the present research, the following parameters and indicators were determined: the specific surface area S QSDFT [m 2 g −1 ], the volume of micropores V QSDFT [cm 3 g −1 ], and the pore size distribution PSD obtained via the QSDFT method [42][43][44][45], the value of parameters of the porous structure. i.e., the volume of the first adsorbed layer V hA [cm 3 g −1 ], the dimensionless energy parameter for the first adsorbed layer Q A /RT, the dimensionless energy parameter for the higher adsorbed layers, B C , the geometrical parameter of the porous structure determining the height of the adsorbate molecule clusters α, the geometrical parameter of the porous structure determining the width of the adsorbate molecule clusters β calculated via the LBET method [46][47][48][49][50].…”

Section: Methodsmentioning

confidence: 99%

Computer Analysis of the Effects of Time and Gas Atmosphere of the Chemical Activation on the Development of the Porous Structure of Activated Carbons Derived from Oil Palm Shell

Kwiatkowski

2021

Energies

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The results of the advanced computer analysis of the influence of time and gas atmosphere of the chemical activation process on the microporous structure formation of activated carbons prepared from oil palm shell via microwave irradiation and activation, using potassium hydroxide as an activation agent, are presented in this paper. The quenched solid density functional theory (QSDFT) and the new numerical clustering-based adsorption analysis (LBET) methods were used especially in the analysis of the microporous structure of the activated carbons, taking into account the surface heterogeneity, and the results obtained were confronted with the simple results achieved earlier using Brunauer–Emmett–Teller (BET) and T-plot methods. On the basis of the computer analysis carried out and taking into account the results obtained, it has been shown that the material with the best adsorption properties and suitable for practical industrial applications is activated carbon obtained in a gaseous nitrogen atmosphere at an activation time of 30 min. Moreover, the value of the heterogeneity parameter indicates that the surface area of this activated carbon is homogeneous, which is of particular importance in the practical application. The paper emphasizes that an erroneous approach to the interpretation of analytical results based on gas adsorption isotherms, which consists in basing conclusions only on the values of a single parameter such as specific surface area or micropore volume, should be avoided. Therefore, it is recommended to use in the analysis of measurement data, several methods of porous structure analysis, including methods considering the heterogeneity of the surface, and when interpreting the results one should also take into account the adsorption process for which the analyzed materials are dedicated.

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Artefact peaks of pore size distributions caused by unclosed sorption isotherm and tensile strength effect

Cited by 32 publications

References 65 publications

Do you BET on routine? The reliability of N2 physisorption for the quantitative assessment of biochar’s surface area

Do you BET on routine? The reliability of N2 physisorption for the quantitative assessment of biochar’s surface area

Uniform Zn Deposition Achieved by Conductive Carbon Additive for Zn Anode in Zinc‐Ion Hybrid Supercapacitors

Computer Analysis of the Effects of Time and Gas Atmosphere of the Chemical Activation on the Development of the Porous Structure of Activated Carbons Derived from Oil Palm Shell

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