Anchored CoCO3 on peeled graphite sheets toward high-capacity lithium-ion battery anode

• Published in: Journal of materials science Vol. 56; no. 17; pp. 10510 - 10522
• Main Authors: Xi, Guocui, Jiao, Xun, Peng, Qimeng, Zeng, Tianbiao
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2021; Springer Nature B.V
• Subjects: Anodes; Ball milling; Carbonates; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crushing; Crystallography and Scattering Methods; Energy Materials; Graphene; Graphite; Lithium; Lithium-ion batteries; Materials Science; Polymer Sciences; Rechargeable batteries; Sheets; Solid Mechanics; Transition metals
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-021-05933-y

Transition metal carbonates are attracting significant interests as lithium-ion batteries (LIBs) anode due to their high specific capacity and initial Coulombic efficiency. However, the internal poor conductivity and volume variation hinder their application. In this work, we report an approach to crush CoCO 3 and peel graphite synchronously, in which the crushed CoCO 3 was anchored on peeled graphite sheets via one step ball-milling method. The peeled graphite sheets act as electron conductive layers and can relax the volume expansion/shrink of CoCO 3 during lithiation/de-lithiation. The graphite was peeled to 4.5 layers averagely, and the CoCO 3 was crushed to particles of less than 500 nm simultaneously. CoCO 3 particles play the role of high capacity function material in CoCO 3 /graphene (CoCO 3 /G) anode. The CoCO 3 /G electrode exhibits an initial capacity of 1314 mAh g −1 and 661 mAh g −1 at 200th cycle at 100 mA g −1 . Such facile method is promising for obtaining various graphene-anchored composites with improved electrochemical performances.