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Enhanced reversibility of single crystal Ni-rich cathode materials via Ti doping.
- Source :
-
Electrochimica Acta . Mar2024, Vol. 479, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Single crystal nickel-rich cathodes have been widely studied in the field of lithium-ion batteries (LIBs) due to their high volumetric energy density and good structural/electrochemical stability. However, a larger particle size (∼ 5 µm) prolongs the diffusion path of Li+ and leads to poor rate performance. In this work, a modification strategy of Ti4+ doping was used to prepare single-crystal Ni-rich cathodes LiNi 0.88 Co 0.06 Mn 0.06 O 2 with good rate performance. Compared to the polycrystalline Ni-rich cathode, the modified cathodes will have wider lithium channels to strip and embed lithium ions more easily. Concurrently, the secure Ti-O bonds can not only maintain the transition metal layer but also inhibit the "air sensitive effect". After 100 cycles, the electrochemical performance shows that the modified cathodes with 1 at.% Ti4+ doping have a comparatively high original capacity of 193.8 mAh g −1 and an upgraded capacity retention of ∼ 93.6 % (2.8–4.3 V) at 1 C. A better rate performance (118.6 mAh g −1) can be achieved at 10 C. This discovery will provide a good research direction for improving the insufficiency of single crystal nickel-rich cathodes. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 479
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 175499700
- Full Text :
- https://doi.org/10.1016/j.electacta.2024.143855