Ethylenediamine-assisted Co-assembly Strategy: Controllable Synthesis of Nitrogen-rich Doped Hollow Porous Carbon Spheres for Supercapacitors

doi:10.1007/s40242-025-5128-3

Chemical Research in Chinese Universities ›› 2026, Vol. 42 ›› Issue (1): 176-183.doi: 10.1007/s40242-025-5128-3

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Ethylenediamine-assisted Co-assembly Strategy: Controllable Synthesis of Nitrogen-rich Doped Hollow Porous Carbon Spheres for Supercapacitors

HUANG Jiaxing¹, LIU Yumeng¹, ZHANG Liangliang¹, LI Li¹, TAN Zhengwen¹, ZHANG Ling², QIAO Zhen-an¹

1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China;
2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China

Received:2025-06-11 Online:2026-02-01 Published:2026-01-28
Contact: QIAO Zhen-an,E-mail:qiaozhenan@jlu.edu.cn;ZHANG Ling,E-mail:zhanglingchem@jlu.edu.cn E-mail:qiaozhenan@jlu.edu.cn;zhanglingchem@jlu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Nos. 22175071, 22425104), the National Key R&D Program of China (No. 2023YFA1506301), the “111” Project of the Ministry of Education of China (No. B17020), and the Jilin Province Science and Technology Development Plan, China (No. YDZJ202101ZYTS137).

Abstract

Abstract: Owing to the unique structural characteristics and heteroatom doping as electrode materials for supercapacitor application, nitrogen-doped hollow porous carbon spheres (N-HPCS) have been extensively studied. However, the synthesis of N-HPCS with high nitrogen contents above 15% (mass fraction) is still a great challenge. Herein, an ethylenediamine-assisted co-assembly strategy is used to control the self-assembly between the 2,6-diaminopyridine-glyoxal Schiff base polymer precursor and the silica template, resulting in high N-content N-HPCS. The N-HPCS renders quantitatively controllable shell thickness (7—40 nm), controllable diameter of cavity (270—620 nm), high and adjustable N content (up to 15.1%, mass fraction), as well as a high ratio of beneficial N species (44.5% pyridine N and 36.7% pyridone/pyrrole N). N-HPCS exhibits excellent properties for supercapacitors with a ratio capacitance of 335 F/g at 0.2 A/g, and almost no attenuation of specific capacitance after 3000 cycles at a current density of 5 A/g, showing excellent cycle stability. The as-synthesized N-HPCS with high surface area, hollow structure and high nitrogen content exhibits broad application prospects as an advanced energy storage material.

Key words: Co-assembly strategy, Nitrogen-rich doping, Hollow porous carbon sphere, Supercapacitor

HUANG Jiaxing, LIU Yumeng, ZHANG Liangliang, LI Li, TAN Zhengwen, ZHANG Ling, QIAO Zhen-an. Ethylenediamine-assisted Co-assembly Strategy: Controllable Synthesis of Nitrogen-rich Doped Hollow Porous Carbon Spheres for Supercapacitors[J]. Chemical Research in Chinese Universities, 2026, 42(1): 176-183.

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Ethylenediamine-assisted Co-assembly Strategy: Controllable Synthesis of Nitrogen-rich Doped Hollow Porous Carbon Spheres for Supercapacitors

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