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Abstract:
Volume changechange during the insertion/extractio of Li+ in electrode materials is in important issue to affect the safety and stability of Li-ion batteries. Here, we prepare a near-zero volume change material of COF derived mesh-liked carbon/TiO2 (MC/TiO2) composite by using a layered TiO2 as a template, and a two-dimensional COF material is insert into the interlayers by the Schiff base polymerization between melamine and terephthalaldehyde, followed by carbonization at 500 degrees C to convert COF to mesh-liked carbon nanosheets. Due to the introduction of mesh-liked carbon nanosheets, the interlayer conductivity of TiO2 is improved, and the nanocavities in mesh-liked carbon nanosheets provide additional chambers for the insertion/extraction Li-ions without any change of the interlayer distance. The MC/TiO2 shows a specific capacity of 472.7 mAh/g at a current density of 0.1 A/g, and good specific capacity retention of 65% remains after 1000 cycles at a current of 1 A/g.
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Source :
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
ISSN: 0254-5861
CN: 35-1112/TQ
Year: 2021
Issue: 6
Volume: 40
Page: 797-805
0 . 8 4 7
JCR@2021
5 . 9 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:117
JCR Journal Grade:4
CAS Journal Grade:3
Cited Count:
SCOPUS Cited Count: 4
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: