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Enhancing LiNiO2 cathode materials by concentration-gradient yttrium modification for rechargeable lithium-ion batteries
- Source :
- Journal of Energy Chemistry. 63:312-319
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Lithium nickel oxide (LiNiO2) cathode materials are featured with high capacity and low cost for rechargeable lithium-ion batteries but suffer from severe interface and structure instability. Here we report that rationally designed LiNiO2 via concentration-gradient yttrium modification exhibits alleviative side reactions and improved electrochemical performance. The LiNiO2 cathode with LiYO2-Y2O3 coating layer delivers a discharge capacity of 225 mAh g−1 with a high initial Coulombic efficiency of 93.4%. These improvements can be attributed to the formation of in-situ modified hybrid LiYO2-Y2O3 coating layer, which suppresses phase transformation, electrolyte oxidation and salt dissociation due to the formation of protective cathode electrolyte interface. The results indicate promising application of concentration-gradient yttrium coating as a facile approach to stabilize nickel-rich cathode materials.
- Subjects :
- Materials science
Nickel oxide
Energy Engineering and Power Technology
chemistry.chemical_element
Electrolyte
Yttrium
engineering.material
Electrochemistry
Cathode
law.invention
Fuel Technology
Coating
chemistry
Chemical engineering
law
engineering
Lithium
Faraday efficiency
Energy (miscellaneous)
Subjects
Details
- ISSN :
- 20954956
- Volume :
- 63
- Database :
- OpenAIRE
- Journal :
- Journal of Energy Chemistry
- Accession number :
- edsair.doi...........ed37bce55014e718e1f91ebcd64e6bb1