Super-lattices enabled performances of vanadate-phosphate glass-ceramic composite cathode in lithium-ion batteries.
In: Ceramics International, Jg. 50 (2024-05-05), Heft 9, S. 15407-15416
academicJournal
Zugriff:
Among all the cathode materials in lithium-ion batteries (LIBs), V 2 O 5 has gained a lot of attention due to its high theoretical specific capacity (∼440 mAh g−1). However, only some of the lithium-ions can be reversibly extracted after inserting into V 2 O 5 cells, making the actual reversible capacity of the crystalline V 2 O 5 cathode material much lower than its theoretical specific capacity. In this work, we prepared Li 2 O–V 2 O 5 –P 2 O 5 ternary glass by melt-quenching method. Subsequently, we grew nano-sized crystals and super-lattice structures in the glass matrix by precise heat treatment. Systematic structural, electrochemical tests and first-principles computations have shown that a reasonable amount of super-lattice structure can significantly enhance the electronic and ionic conductivity of glass matrix materials. Benefiting from this, the LVP-70-2 composite cathode exhibited excellent lithium storage performance with a stable reversible capacity of nearly ∼280 mAh g−1 at 50 mA g−1 and an outstanding cycling performance of a remaining capacity of 90 mAh g−1 at 1600 mA g−1 after 200 cycles. [ABSTRACT FROM AUTHOR]
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Super-lattices enabled performances of vanadate-phosphate glass-ceramic composite cathode in lithium-ion batteries.
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Autor/in / Beteiligte Person: | Wang, Zhaoyang ; Du, Zijuan ; Li, Zhi ; Zhang, Xuhan ; Liu, Jingtian ; Dai, Yuhang ; Zhang, Wei ; Wang, Dong ; Wang, Yaoyao ; Li, Hengxiang ; Ding, Lei ; Tao, Haizheng |
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Zeitschrift: | Ceramics International, Jg. 50 (2024-05-05), Heft 9, S. 15407-15416 |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0272-8842 (print) |
DOI: | 10.1016/j.ceramint.2024.02.012 |
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