Porous Na3V2(PO4)3 prepared by freeze-drying method as high performance cathode for sodium-ion batteries. Issue 8 (1st June 2018)

• Record Type: Journal Article
• Authors: Zheng, Li-Li; Xue, Yuan; Hao, Su-E.; Wang, Zhen-bo
• Is Part Of: Ceramics international. Volume 44:Issue 8(2018)
• Page Start: 9880
• Page End: 9886
• Publication Date: 2018-06-01
• Subjects: Sodium-ion batteries -- Na3V2(PO4)3 -- Porous structure -- Freeze drying process; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.03.001
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Na3 V2 (PO4 )3 has aroused extensive attention as next generation cathode material for sodium-ion batteries because of its abundance, good thermal stability and special 3D Na + channel. In the current work, porous Na3 V2 (PO4 )3 material is prepared by a simple freeze drying method followed by calcinations. Inside the porous material, Na3 V2 (PO4 )3 particles are embedded in carbon matrix, thus forming facial electron channels and reducing Na + ion diffusion distance at the same time. Benefiting from the special porous structure, this material displays excellent rate capability of 92.8 mA h g −1 at high rate of 20 C. Equally impressive is the long cycling stability. 90.2% of the initial capacity is retained after 2000 cycles at 5 C. This kind of feasible preparation method and beneficial design provide a good strategy for other materials to improve electric conductivity and cycling stability.