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Rational design of high nitrogen-doped and core-shell/mesoporous carbon nanospheres with high rate capability and cycling longevity for pseudocapacitive sodium storage
Mao, JY; Niu, DC; Jiang, N; Jiang, GY; Chen, MW; Li, YS; Shi, JL
2020-05-21
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Issue19Pages:9768
SubtypeArticle
AbstractCarbonaceous materials are extensively used as sodium-ion battery (SIB) anodes for their cost-effectiveness, high conductivity and reasonably high capacity. Unfortunately, these anodes suffer from poor rate performances and unsatisfactory lifespan. Herein, the design and construction of high nitrogen-doped, core-shell and intra-core mesoporous structured carbon nanospheres (designated as HN-CSMCNs) for high-rate and stable SIBs is reported. HN-CSMCNs are facilely synthesized by the self-assembly of block copolymer polystyrene-b-poly(acrylic acid), cetyltrimethylammonium bromide and dopamine hydrochloride, and subsequent pyrolysis under an NH3 atmosphere. As an anode for SIBs, HN-CSMCNs exhibit outstanding specific capacity (ca. 251 mA h g(-1) at 0.1 A g(-1)), rate capability (ca. 104 mA h g(-1) at 15 A g(-1)), and more importantly, especially stable cycling properties with a capacity of ca. 153 mA h g(-1) being retained after 20 000 cycles at 10 A g(-1). Electrochemical analysis demonstrates that the core-shell and intra-core mesoporous structures, expanded inter-planar distance and high pyrrolic/pyridinic-N doping of HN-CSMCNs together contribute to the superior sodium storage capability via a pseudocapacitive-dominated electrochemical kinetics, thus leading to superior electrochemical performances for SIBs.
DOI10.1039/d0ta03229h
WOS KeywordHIERARCHICALLY POROUS CARBON ; ION BATTERIES ; HIGH-CAPACITY ; ANODE ; LITHIUM ; NANOPARTICLES ; SPECTROSCOPY ; COMPOSITE ; ELECTRODE ; FILM
Language英语
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
PublisherROYAL SOC CHEMISTRY
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28045
Collection中国科学院上海硅酸盐研究所
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GB/T 7714
Mao, JY,Niu, DC,Jiang, N,et al. Rational design of high nitrogen-doped and core-shell/mesoporous carbon nanospheres with high rate capability and cycling longevity for pseudocapacitive sodium storage[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020(19):9768.
APA Mao, JY.,Niu, DC.,Jiang, N.,Jiang, GY.,Chen, MW.,...&Shi, JL.(2020).Rational design of high nitrogen-doped and core-shell/mesoporous carbon nanospheres with high rate capability and cycling longevity for pseudocapacitive sodium storage.JOURNAL OF MATERIALS CHEMISTRY A(19),9768.
MLA Mao, JY,et al."Rational design of high nitrogen-doped and core-shell/mesoporous carbon nanospheres with high rate capability and cycling longevity for pseudocapacitive sodium storage".JOURNAL OF MATERIALS CHEMISTRY A .19(2020):9768.
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