journal article·2018-08-27

Nitrogen-Enriched Hollow Porous Carbon Nanospheres with Tailored Morphology and Microstructure for All-Solid-State Symmetric Supercapacitors

Ziyang Song, Dazhang Zhu, Danfeng Xue, Jingjing Yan, Xiaolan Chai, Wei Xiong, Zhiwei Wang, Yaokang Lv, Tongcheng Cao, Mingxian Liu, Lihua Gan

ACS Applied Energy Materials· Volume 1· Issue 8
Publisher page

Abstract

We develop a straightforward and highly efficient approach to design N-enriched hollow porous carbon nanospheres (N-HPCNs) based on the self-polymerization of dopamine in mixed water/ethanol solvents. The control of the morphology, pore parameters, and nitrogen content of N-HPCNs can be effectively achieved by simple tuning of the volume ratios of water/ethanol and the amounts of the solvents. The representative N-HPCNs exhibit the characteristics of spherical and hollow geometry with a uniform diameter (∼400 nm), high surface area (1789 m2 g–1), abundant ultramicropores with reasonable supermicro- and mesopores, and high-level nitrogen content (up to 6.86 wt %). N-HPCNs as supercapacitor electrodes in 6 M KOH electrolyte show outstanding electrochemical performances including a high specific capacitance (353 F g–1 at 0.5 A g–1), superb rate capability (214 F g–1 at 20 A g–1), and excellent cycling stability (91.9% capacitance retention at 1.0 A g–1 after 10,000 cycles). Furthermore, the assembled symmetric all-solid-state supercapacitor based on N-HPCN electrodes and poly(vinyl alcohol)/KOH gel electrolyte exhibits high integrated energy–power density of 10.42 W h kg–1 at 250 W kg–1. This study provides promising prospects to design N-doped carbons with tailored morphology and microstructure for high-performance supercapacitors.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Biomedical Multidisciplinary Innovation Research Institute, Shanghai East Hospital, Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China

School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, People’s Republic of China

State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China

Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, People’s Republic of China

College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China

Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, People’s Republic of China

Funding

Ministry of Education of the People's Republic of China · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Large Equipment Test Foundation, Tongji University

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