Facile Synthesis of hybrid phase Li2NaV2(PO4)3 and its application in lithium ion full cell: Li2NaV2(PO4)3∥ Li2NaV2(PO4)3

被引:21
作者
Mao, Wen-feng [1 ,2 ]
Ma, Ye [1 ]
Liu, Shan-ke [3 ]
Tang, Zhi-yuan [1 ]
Fu, Yan-bao [2 ]
机构
[1] Tianjin Univ, Sch Chem & Engn, Dept Appl Chem, Tianjin 300072, Peoples R China
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[3] Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
关键词
Lithium ion battery; Composite material; full cell; CATHODE MATERIAL; NANOCOMPOSITE; NA3V2(PO4)(3);
D O I
10.1016/j.electacta.2014.09.148
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
High performance hybrid phase Li2NaV2(PO4)(3) (H-LNVP) composite consist of rhombohedral Li3V2(PO4)(3) (60.9%), rhombohedral Na3V2(PO4)(3) (31.6%) and monoclinic Li3V2(PO4)(3) (7.5%) is successfully synthesized via a sol-gel method. The rhombohedral phase Li2NaV2(PO4)(3) (R-LNVP) is also obtained for comparison. The H-LNVP delivers better electrochemical performance, higher Li+ diffusion coefficient and more stable structure than that of R-LNVP duo to the existence of small amount monoclinic Li3V2(PO4)(3). For the synthesised H-LNVP, there are 123.3 mAh g(-1) that can be delivered at 0.5 C rate as cathode and 128.4 mAh g(-1) that can be delivered at 0.2 Crate as anode. On this basis, a LNVP parallel to LNVP lithium ion full cell is fabricated, with an output output potential of similar to 2.48 V and a specific discharge capacity of 99.3 mA h g(-1). (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:498 / 505
页数:8
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