期刊
COMPOSITES COMMUNICATIONS
卷 32, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2022.101116
关键词
Multiple-heteroatom-doping; Hollow carbon nanocage; Covalent triazine polymer; Sodium-ion battery
资金
- National Natural Science Foundation of China [U20A20257]
A template-initiated strategy was used to fabricate nitrogen, phosphorus, fluorine co-doped hollow carbon nanocages, which showed excellent electrochemical performance in sodium-ion batteries.
Carbon-based material is one of the most promising candidates of anode materials for sodium-ion batteries (SIBs). However, the poor rate performance and low capacity due to intrinsic nature greatly impact their practical application. Heteroatom-doped carbon material is an efficient method to optimize the electrochemical performance of anode electrodes for SIBs. Herein, we report a template-initiated strategy to fabricate nitrogen, phosphorus, fluorine co-doped hollow carbon nanocages (NPF-HCN) derived from a rationally designed zeolitic imidazolate framework-8@covalent triazine polymer core-shell structured nanocomposites (ZIF-8@CTP). High proportions of tailored multi-heteroatom species within the CTP network contribute to the in-situ generation of N, P, F-doping in the resultant hollow carbon nanocages. Additionally, the hierarchical porous and hollow nanostructures of the NPF-HCN can promote the penetration of electrolytes, thus reduce diffusion barrier of Na+. As anode materials of SIBs, the as-prepared NPF-HCN delivers a higher initial capacity of 569.6 mA h/g at 1 A/g and a superior cycling behavior with a high capacity of 220.3 mA h/g at 5 A/g after 5000 cycles.
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