期刊
COMPOSITES PART B-ENGINEERING
卷 224, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.109247
关键词
Covalent-organic frameworks; Lithium-ion batteries; HollowCo(3)O(4) nanomaterials; Carbon nanobubble film; N-doped carbon
资金
- National Natural Science Foundation of China [21765009, 21964010]
- Science and Technol-ogy Support Program of Jiangxi Province [20123BBE50104, 20133BBE50008]
Co3O4 nanomaterials and N-doped carbon nanobubble film composites were successfully prepared by using COFs as templates, showing good lithium storage ability and cycle stability. The combination of CNBF and H-Co3O4 provides a new guide for the preparation of novel metal oxides and carbon composites.
Co3O4 nanomaterials and their composites are replacing carbon as anode materials of lithium-ion batteries (LIBs) because of their large theoretical capacity, low cost and high abundance. However, the volume expansion in the process of charging/discharging leads to the destruction of Co3O4 nanomaterials and thus results in poor cyclic stability, which limits their practical application seriously. Herein, a novel N-doped carbon nanobubble film (CNBF) with hollow Co3O4 nanomaterials (H-Co3O4) composites (H-Co3O4@CNBF) was prepared by proposing covalent-organic framework (COF) as template and carrier of Co2+. Using in-situ anchoring H-Co3O4 strategy, a two-step calcination method was employed to prepare H-Co3O4@CNBF. The obtained H-Co3O4@CNBF exhibited a good lithium storage ability originated from anchored H-Co3O4 nanomaterials and high cycle performance as the anode of LIBs came from the buffering of CNBF. The as-prepared H-Co3O4@CNBF showed excellent capacity of 808.0 mA h g-1 after 100 cycles at 0.2 A g-1 and outstanding cycle stability of 540.0 mA h g-1 after 200 cycles at 2 A g-1. The combination of CNBF derived from COFs with H-Co3O4 is a good strategy, which provides a new guide for the preparation of novel metal oxides and carbon composites.
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