Back to Search
Start Over
For regenerated graphite: Tailoring sub-surface architecture with strong pre-storage abilities towards high-rate properties.
- Source :
-
Chemical Engineering Journal . Jul2024, Vol. 491, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- • The subsurface tailoring manner is used for recycling graphite from spent LIBs. • Optimizing physicochemical behaviors of graphite with the help of ionic liquids. • The RG-2 anode exhibits impressive long-cycle stability and remarkable ICE. • Specific energy-storage mechanisms for different cycling stages are proposed. • The well-prepared anodes provide outstanding economic and environmental values. Captured by the economic value and environmental friendliness, the high-value recycling of spent batteries has been devoted plenty of attention. However, the regenerated graphite is still limited by large anisotropy and inferior rate abilities. Through the tailoring of low-temperature ionic liquid, the further regenerated graphite displayed rich sub-surface pores and improved crystalline degree, bringing about strong wettability and enhanced isotropy. Utilizing as lithium-storage anode, the optimized sample could deliver a capacity of 321 mAh/g after 300 loops at 1.0 C. Even at 2.0 C after 400 cycles, their capacity could also remain about 278 mAh/g. Supported by the detailed kinetic analysis, the abundant pores of sub-surface served significant roles in the enhancements of diffusion/surface-controlling behaviors. Their pre-storage advantages would be beneficial for the alleviation of voltage dropping, resulting in improved rate properties. Meanwhile, its activation energy was calculated at about 14.52 KJ mol−1, revealing its relatively small ion-diffusion energy barrier. More significantly, assisted by economic analysis, its revenue could also reach up to 5700$ t−1, with a promising recycling value. Given this, the work is expected to offer significant cooperative regeneration manners and shed light on the significant effect of sub-surface designing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 491
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 177747734
- Full Text :
- https://doi.org/10.1016/j.cej.2024.151948