Aluminum-stabilized NASICON-structured Li3V2( PO4)(3)

作者：Lu, Yuhao^*; Wang, Long; Song, Jie; Zhang, Dawei; Xu, Maowen; Goodenough, John B

来源：Journal of Materials Chemistry A, 2013, 1(1): 68-72.

DOI：10.1039/c2ta00029f

• Cath-ode materials
• Electrochemical evaluations
• Interstitial space
• Lithium ion exchange
• Lithium transport
• Phase analysis
• Redox couple
• Reversible capacity

The redox couple, V4 /V3 , exhibits a potential of 3.76 V in NASICON-structured Li3Al0.1V1.9(PO4)(3), which is suitable for a cathode material of a lithium-ion battery. The rhombohedral NASICON framework provides a large interstitial space for fast lithium transport, but the structure has to be prepared by the lithiumion-exchange method from NASICON-structured Na3V2(PO4)(3). We used a LiNO3 aqueous solution to treat Na3V2(PO4)(3) for two weeks; a mixture of rhombohedral and monoclinic Li3V2(PO4)(3) was obtained in the final product. Therefore, we introduced aluminum into the NASICON framework. Results from phase analysis and electrochemical evaluation have concluded that the aluminum stabilizes the NASICON framework of V-2(PO4)(3) in the lithium ion-exchange process. The aluminum-stabilized Li3Al0.1V1.9(PO4)(3) showed a reversible capacity of 70mA h g(-1) compared to 15mAh g(-1) for the non-aluminum-doped n-LVP at 5C rate.

• 出版日期2013
• 单位合肥工业大学