期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 914, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165182
关键词
Li2.7V2.1(PO4)(3)/C; Hybrid-ion battery; Cathode material
资金
- National Key R&D Program of China [2017YFB1103500]
- National Natural Science Foundation of China [51771053, 51971109, 51877045, 51802031]
- Fundamental Research Funds for the Central Universities [2242020k30039]
- open research fund of Key Laboratory of MEMS of Ministry of Education, Southeast University
A novel structure for Li/Na hybrid-ion batteries with unique two-stage electrochemical reactions is proposed. This design strategy harnesses the synergistic contribution of Li+ and Na+ ions, providing an efficient solution to improve battery performance and achieve superior rate performance.
A novel structure for Li/Na hybrid-ion batteries with unique two-stage electrochemical reactions is proposed, using nonstoichiometric Li2.7V2.1(PO4)(3)/C materials as the cathode and Na foil as the anode with a Li-ion electrolyte. A discharge specific capacity of 132.99 mAh.g(-1) is delivered at a current density of 100 mA.g(-1) in the range of 2.5-4.2 V. Besides, when the current density increases to 1000 mA.g(-1), the specific density can reach a value of 108.50 mAh.g(-1), which indicates superior rate performance. After 800 cycles, a discharge capacity of 87.11 mAh.g(-1) is still observed at 1000 mA.g(-1) in a voltage range of 3.0-4.3 V, maintaining a retention rate of 80.42%. This simple design strategy for Li/Na hybrid-ion batteries harvests the synergetic contribution of Li+ and Na+ ions and provides an efficient solution to further improve hybrid-ion battery performance. (C) 2022 Elsevier B.V. All rights reserved.
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