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Abstract:
MOF-derived Co3SnC0.7/Co3Sn2@NC composites with heterostructure were successfully prepared in this work. Typically, with hollow CoSn(OH)(6) as the precursor, ZIF-67 was coated on its surface by controlling Co2+ concentration and solvent, and then carbonized to obtain target products. During the calcination process, the hollow precursor interacts with the MOF material formed in situ on its surface, which not only realizes the regulation of product composition, but also forms a heterogeneous interface and an efficient conductive network. Co3SnC0.7/Co3Sn2@NC composites showed excellent sodium storage properties with the first discharge/charge specific capacity of 767/421 mAh.g(-1) at a current density of 100 mA.g(-1) and reversible specific capacity of 300 mAh.g(-1) after 100 cycles. The heterogeneous interface in the electrode material could increase the active site of sodium storage and promote the diffusion rate of sodium ions. The N-doped MOF-derived carbon layer and the inactive metal Co in Co3SnC0.7/Co3Sn2@NC not only improve Na+/e(-) conduction rates, but also disperse the active material to prevent agglomeration. Our work provides a new strategy for rationally designing the structure and composition of energy materials.
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SOLID STATE IONICS
ISSN: 0167-2738
Year: 2022
Volume: 380
3 . 2
JCR@2022
3 . 2 0 0
JCR@2022
ESI Discipline: PHYSICS;
ESI HC Threshold:41
JCR Journal Grade:2
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 3
SCOPUS Cited Count: 3
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 9
Affiliated Colleges: