首页|High-performance Li/Na hybrid-ion batteries with nonstoichiometric Li2.7V2.1(PO4)3/C as cathode material
High-performance Li/Na hybrid-ion batteries with nonstoichiometric Li2.7V2.1(PO4)3/C as cathode material
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NSTL
Elsevier
? 2022 Elsevier B.V.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.
Cathode materialHybrid-ion batteryLi2.7V2.1(PO4)3
Liu Y.、Shen K.、Zhao W.、Liu D.、Chen Y.、Xu Q.、Ding K.、Fan Q.、Qin S.
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School of Material Science and Engineering Southeast University
College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics
School of Physics Southeast University
School of Sciences Changzhou Institute of Technology
NSTL
Elsevier
