Journal
CHEMSUSCHEM
Volume 11, Issue 1, Pages 202-208Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201701759
Keywords
carbon nanotubes; graphite intercalation; metal-organic frameworks; nitrogen-doped; potassium-ion battery
Funding
- National Natural Science Foundation of China [51672188]
- Natural Science Foundation of Tianjin City [16JCYBJC40900]
- Thousand Talents Plan for Young Professionals of China
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To tackle the issue of the poor rate capability of graphite anodes for potassium-ion batteries (KIBs), nitrogen-doped carbon nanotubes (NCNTs) with an edge-open layer-alignment structure were synthesized using a simple and scalable approach of pyrolyzing cobalt-containing metal-organic frameworks. The unique structure enables a facile and fast intercalation of K ions. As anodes of KIBs, the NCNTs demonstrated an improved rate capability by a high capacity retention of 102mAhg(-1) at a high current density of 2000mAg(-1) and a good stability without evident capacity loss over 500cycles at 2000mAg(-1). Our findings can help to develop highperformance anode materials for potassium-ion batteries as large-scale and low-cost energy-storage systems.
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