Tailored N-doped porous carbon nanocomposites through MOF self-assembling for Li/Na ion batteries.
J Colloid Interface Sci
; 538: 267-276, 2019 Mar 07.
Article
em En
| MEDLINE
| ID: mdl-30513468
ABSTRACT
Presently, carbon-based anodes for energy storage, such as graphite for lithium-ion batteries (LlBs) and hard carbon for sodium-ion batteries (SlBs), have low capacity and poor rate properties. However, the capacity and rate capability of these anodes can be improved via morphological control, doping and using nanostructures. In this report, a series of self-assembled N-doped porous carbon nanocomposites (NPCNs) were prepared via pyrolysis of metal-organic frameworks (MOFs)-ZIF-8/carbon nanocomposites grown on various carbon frameworks (1D CNT and/or 2D rGO). It was found that the NPC-CNT@G electrode significantly exhibits superior performance for lithium/sodium storage among the other NPCNs. NPC-CNT@G electrode delivers high initial reversible capacities (986â¯mAhâ¯g-1 at 0.1â¯Aâ¯g-1 in LIBs; 315â¯mAhâ¯g-1 at 0.05â¯Aâ¯g-1 in SIBs), excellent rate properties (443â¯mAhâ¯g-1 at 5â¯Aâ¯g-1 in LIBs; 174â¯mAhâ¯g-1 at 1â¯Aâ¯g-1 in SIBs) and durable cycle life (99% capacity retention after 2000 cycles at 5â¯Aâ¯g-1 in LIBs, 80% capacity retention after 300â¯cycle at 1â¯Aâ¯g-1 in SIBs). This 'carbon-on-carbon' approach described herein can be applied to make other interesting structures for high performance battery materials.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
J Colloid Interface Sci
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
China