2023
DOI: 10.1021/acsanm.3c00501
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N-Doped Yolk–Shell Carbon Nanospheres with “Carbon Bridges” for Supercapacitors

Abstract: N-doping multilocular carbon spheres are beneficial to improving the electrical property due to their unique pore structure and elemental composition; nevertheless, there is a great challenge to fabricate this structure in a facile way. In this work, an N-doping yolk–shell carbon nanosphere with a “carbon bridges” structure was prepared by domain-limited carbonization of RF@SiO2 (RF = resorcinol-formaldehyde resin) with ethylenediamine (EDA) as the nitrogen precursor. The structure of the “carbon bridges” and … Show more

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Cited by 15 publications
(2 citation statements)
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“…The area percentages of pyrrolic N (from 34.5 to 18.2%) and pyridinic N (from 29.3 to 26.2%) on Ru/NCB-600 decreased compared with Ru/CB-600, and the decrease of pyrrolic N and pyridinic N can be attributed to the formation of Ru–N species (19.6%), both of which can be preferentially paired with metal ions (Table S3). Compared with Ru/CB-600, the peaks of pyridinic N and pyrrolic N on Ru/NCB-600 shift to higher binding energy, suggesting that there exists an electron transfer from N to Ru. Figure d shows that the binding energy of Ru 3d 5/2 on Ru/NCB-600 moved from 280.3 to 280.2 eV compared with Ru/CB-600 (Figure b), demonstrating that N doping could increase the local electron density of Ru species (Ru δ− ).…”
Section: Resultsmentioning
confidence: 98%
“…The area percentages of pyrrolic N (from 34.5 to 18.2%) and pyridinic N (from 29.3 to 26.2%) on Ru/NCB-600 decreased compared with Ru/CB-600, and the decrease of pyrrolic N and pyridinic N can be attributed to the formation of Ru–N species (19.6%), both of which can be preferentially paired with metal ions (Table S3). Compared with Ru/CB-600, the peaks of pyridinic N and pyrrolic N on Ru/NCB-600 shift to higher binding energy, suggesting that there exists an electron transfer from N to Ru. Figure d shows that the binding energy of Ru 3d 5/2 on Ru/NCB-600 moved from 280.3 to 280.2 eV compared with Ru/CB-600 (Figure b), demonstrating that N doping could increase the local electron density of Ru species (Ru δ− ).…”
Section: Resultsmentioning
confidence: 98%
“…The search for high energy density and low-cost electrode materials for pseudocapacitors is a top priority. [1][2][3][4][5][6] Compared with oxides, transition metal compounds have better thermal stability and higher conductivity. They have attracted much attention as potential supercapacitor electrode materials.…”
Section: Introductionmentioning
confidence: 99%