NDLI: Isolated Boron and Nitrogen Sites on Porous Graphitic Carbon Synthesized from Nitrogen-Containing Chitosan for Supercapacitors

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Isolated Boron and Nitrogen Sites on Porous Graphitic Carbon Synthesized from Nitrogen-Containing Chitosan for Supercapacitors

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sun, Li Fu, Yu Tian, Chungui Yang, Ying Wang, Lei Yin, Jie Ma, Jing Wang, Ruihong Fu, Honggang
Description	Author Affiliation: Sun L ( Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080 (PR China).)
Abstract	Separated boron and nitrogen porous graphitic carbon (BNGC) is fabricated by a facile hydrothermal $coordination/ZnCl_{2}-activation$ process from renewable and inexpensive nitrogen-containing chitosan. In this synthetic pathway, chitosan, which has a high nitrogen content, first coordinates with $Fe^{3+}$ ions to form chitosan–Fe that subsequently reacts with boric acid (boron source) to generate the BNGC precursor. After simultaneous carbonization and $ZnCl_{2}$ activation followed by removal of the Fe catalyst, BNGC, containing isolated boron and nitrogen centers and having a high surface area of $1567 m^{2} g^{−1}$ and good conductivity, can be obtained. Results indicate that use of chitosan as a nitrogen-containing carbon source effectively prevents nitrogen atoms from direct combination with boron atoms. In addition, the incorporation of $Fe^{3+}$ ions not only endows BNGC with high graphitization, but also favors for nitrogen fixation. Remarkably, the unique microstructure of BNGC enables its use as an advanced electrode material for energy storage. As electrode material for supercapacitors, BNGC shows a high capacitance of $313 F g^{−1}$ at $1 A g^{−1},$ and also long-term durability and coulombic efficiency of >99.5 % after 5000 cycles. Notably, in organic electrolytes, the energy density could be up to $50.1 Wh kg^{−1}$ at a power density of $10.5 kW kg^{−1}.$ The strategy developed herein opens a new avenue to prepare BNGC without inactive BN bonds from commercially available chitosan for high-performance supercapacitors.
File Format	HTM / HTML
ISSN	18645631
Issue Number	6
Volume Number	7
e-ISSN	1864564X
Journal	ChemSusChem
Language	English
Publisher	Wiley-VCH
Publisher Date	2014-06-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Zinc Compounds Discipline Sustainable Chemistry Nitrogen Journal Article Electrodes Boron Chemistry Chlorides Graphite Electric Capacitance Chitosan Porosity
Content Type	Text
Resource Type	Article
Subject	Energy Environmental Chemistry Materials Science Chemical Engineering

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