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Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries

Hierarchically porous nitrogen-doped graphene frameworks (N-GFs) are fabricated through the ice-templating of GO with polyethylenimine and the thermal treatment of the resultant hybrids. As cathode materials in lithium ion batteries (LIBs), the obtained N-GFs exhibit an outstanding specific capacity of 379 mA h g−1 at 0.5 A g−1 for 2500 cycles. Even at an ultrahigh current density of 5 A g−1, the N-GFs maintain a capacity of 94 mA h g−1, superior to that of most reported LIB cathode materials. The experimental results and quantum mechanics calculations suggest that pyridinic-like N and pyridinic N-oxide in graphene are responsible for the excellent cathodic performance of the bipolar N-GFs by providing fast surface faradaic reactions with both p- and n-doped states.

Identiferoai:union.ndltd.org:DRESDEN/oai:qucosa.de:bsz:14-qucosa-225697
Date17 July 2017
CreatorsHuang, Yanshan, Wu, Dongqing, Dianat, Arezoo, Bobeth, Manferd, Huang, Tao, Mai, Yiyong, Zhang, Fan, Cuniberti, Gianaurelio, Feng, Xinliang
ContributorsRoyal Society of Chemistry,
PublisherSaechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden
Source SetsHochschulschriftenserver (HSSS) der SLUB Dresden
LanguageEnglish
Detected LanguageEnglish
Typedoc-type:article
Formatapplication/pdf
SourceJournals of materials chemistry (2017), 5(4). S. 1588-1594. ISSN 2050-7488. DOI: 10.1039/C6TA09161J.

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