Investigation of electrical conductivity based on porous hollow carbon black for EDLC

Seo, Sang Wan; Ahn, Won Jun; Kang, Seok Chang; Im, Ji Sun

doi:10.1016/j.inoche.2023.110571

Cited by 2 publications

(2 citation statements)

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“…[9][10][11][12][13] Due to crystalline inhomogeneity, several studies have shown that oxidation can preferentially remove the amorphous core while maintaining the ordered shell, forming HCNS with applications as an adsorbent and electrode for batteries and supercapacitors. 1,9,10,[14][15][16][17][18][19] The CB gas and particle emission characteristics during oxidation have also been reported. 20 Increased surface area and porosity in CB after oxidation are directly linked to the development of HCNS.…”

Section: Introductionmentioning

confidence: 99%

“…This structure consists of a reactive amorphous core formed by loosely stacked carbon flakes that are enclosed by a relatively well‐ordered, more crystalline shell 9–13 . Due to crystalline inhomogeneity, several studies have shown that oxidation can preferentially remove the amorphous core while maintaining the ordered shell, forming HCNS with applications as an adsorbent and electrode for batteries and supercapacitors 1,9,10,14–19 . The CB gas and particle emission characteristics during oxidation have also been reported 20 …”

Section: Introductionmentioning

confidence: 99%

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Preparation of hollow carbon nanospheres from oxidation of spent tyre oil‐derived carbon black in air

Okoye,

Zhang,

Zhang

2024

Asia-Pacific J Chem Eng

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Hollow carbon nanospheres (HCNS) were prepared from carbon black (CB) derived from spent tyre pyrolysis oil. The pristine CB produced by partial oxidation of the pyrolysis oil in a drop tube furnace was subsequently oxidised in air in a fixed bed reactor to yield HCNS. The effect of oxidation temperature (300 to 700°C) and time (1 to 8 h) on the burn‐off (Bt) of the sample over the duration (t) of oxidation and average reaction rate (Rt) was assessed. The BET surface area and pore volume and the nanostructure of the HCNS samples obtained were characterised using N2 adsorption–desorption and high‐resolution transmission electron microscope (HRTEM) techniques, respectively. Higher temperature and longer oxidation time led to higher Bt. As Bt increased, the BET surface area and pore volume initially increased linearly due to the removal of the amorphous core and then decreased because of the collapse of the shell of the carbon nanostructure. At Bt of ~56%, the maximum BET surface area and pore volume of the HCNS were 383.2 m2 g−1 and 0.39 cm3 g−1, respectively, compared to ~19.5 m2 g−1 and 0.033 cm3 g−1 of the pristine CB. The HRTEM images indicate that the change in BET surface area corresponds to the formation of the HCNS, as the core of the CB particle was preferentially consumed to create a hollow structure. The formation of HCNS follows an internal oxidation model, which is characterised by rapid core consumption and relatively slow shell consumption.

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