Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 929, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.167299
Keywords
Lithium-ion batteries; Oxygen-vacancy; High capacity; Superior rate capability
Categories
Funding
- Scientific Research Foundation of Chongqing University of Technology
- Youth Project of Science and Technology Research Program of Chongqing Education Commission of China
- National Natural Science Foundation of China
- [2022ZDZ004]
- [2022ZDZ011]
- [KJQN 202201104]
- [KJQN 202201127]
- [21875155]
Ask authors/readers for more resources
This study reports the use of Co3O4-x nanocrystals with abundant oxygen-vacancy and pores as an anode for lithium-ion batteries. The Co3O4-x anode shows increased electronic conductivity and shortened Li+ ions diffusion pathway, leading to remarkable rate capability and high capacity.
The development of high capacity, superior rate capability and long lifespan anodes for lithium-ion bat-teries (LIBs) is an ongoing challenge for meeting the ever-increasing demand of high energy density and fast charging property. In this work, we report Co3O4-x nanocrystals with abundant oxygen-vacancy and pores as the anode for LIBs. Taking profit of the introduced oxygen-vacancy, pores and nanostructure, the Co3O4-x shows an increased electronic conductivity, shortened Li+ ions diffusion pathway, and enables ultrahigh pseudo-capacitive behavior, thereby providing a remarkable rate capability and an ultrahigh capacity be-yond the redox chemistry. On the basis of this understanding, the Co3O4-x anode delivers high capacity (1616 mAh g-1 at 0.1 C, 1 C = 1000 mA g-1), excellent cycling stability and can operate well at rates of 0.1-20 C (842 mAh g-1 at 20 C), which is significantly improved comparable to that of common Co3O4. Furthermore, applications of ex-situ XRD, FTIR, Raman and XPS tests demonstrate the reversible Li+ ions storage mechanism in such well-designed Co3O4-x. Our study highlights the great feasibility and validity of oxygen-vacancy and nanostructure for improving the Li+ ions storage performance.(c) 2022 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available