Bipolar nitrogen-doped graphene frameworks as high-performance cathodes for lithium ion batteries
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
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.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 1588-1594 |
Seitenumfang | 7 |
Fachzeitschrift | Journal of Materials Chemistry. A, Materials for energy and sustainability |
Jahrgang | 5 |
Ausgabenummer | 4 |
Publikationsstatus | Veröffentlicht - 2017 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 85010441022 |
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Schlagworte
Ziele für nachhaltige Entwicklung
Schlagwörter
- nanotechnology