Synthesis and Characterization of a Multi-Layer Core-Shell Composite Cathode Material LiVOPO4-Li3V2(PO4)3
Synthesis and Characterization of a Multi-Layer Core-Shell Composite Cathode Material LiVOPO4-Li3V2(PO4)3
复制标题
多层核壳复合正极材料LiVOPO4-Li3V2(PO4)3的合成与表征
DOI：
10.1149/2.050405jes
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发表时间：
2014
影响因子：
3.9
通讯作者：
Li Hui
中科院分区：
文献类型：
--
作者：
Ming Lei;Wang Jian-long;Qin Shan-e;Li Hui
将Li3V2(PO4)3在350℃空气气氛中焙烧2 h，合成了新型多层核壳复合正极材料LiVOPO4-Li3V2(PO4)3。X射线衍射结果表明，三斜晶型LiVOPO4和单斜晶系Li3V2(PO4)3共存。XPS结果表明，V在样品外表面和内表面的价态分别为+4和+3。高分辨电子显微镜结果表明，样品为多层核壳结构，外层为无定形碳，内层为LiVOPO4，核心层为Li3V2(PO4)3。在45 mA g−1电流密度下，样品的首次放电容量约为132.8 mAhg−1,100次循环后的放电容量约为126.8 mAhg−1。电池保持了95.5%的初始放电容量。其电化学性能远好于纯LiVOPO4。
A novel multi-layer core-shell composite cathode material LiVOPO 4-Li 3 V 2 (PO 4) 3 was synthesized by calcining Li 3 V 2 (PO 4) 3 at 350 C for 2 h in the air atmosphere. The XRD results indicate the triclinic type LiVOPO 4 and the monoclinic Li 3 V 2 (PO 4) 3 co-exist. XPS results reveal that the valence states of V in external surface area and the internal surface area of the sample are+ 4 and+ 3, respectively. HRTEM results indicate the sample has a multi-layer core-shell structure, the external shell is amorphous carbon, the internal shell of the sample is LiVOPO 4, and the core is Li 3 V 2 (PO 4) 3. The initial discharge capacity of LVOP-LVP at the current density of 45 mA g− 1 is about 132.8 mAh g− 1, and the discharge capacity is about 126.8 mAh g− 1 after 100 cycles. The cell retains 95.5% of its initial discharge capacity. The electrochemical performance is much better than that of bare LiVOPO 4.
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影响因子：
2.3
作者：
B. Crist
通讯作者：
B. Crist
影响因子：
9.2
作者：
M. Ren;Zhen Zhou;Liwei Su;X. P. Gao
通讯作者：
M. Ren;Zhen Zhou;Liwei Su;X. P. Gao
影响因子：
8.6
作者：
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通讯作者：
D. Morgan;G. Ceder;M. Saidi;J. Barker;Jeffrey Swoyer;A. H. Huang;G. Adamson
影响因子：
6.6
作者：
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通讯作者：
Jiexi Wang;Xinhai Li;Zhixing Wang;Huajun Guo;Yunhe Zhang;Xunhui Xiong;Zhenjiang He
影响因子：
9.2
作者：
Jun‐chao Zheng;Xinhai Li;Zhixing Wang;S. Niu;De-rong Liu;Ling Wu;Lingjun Li;Jin-hui Li;
通讯作者：
Jun‐chao Zheng;Xinhai Li;Zhixing Wang;S. Niu;De-rong Liu;Ling Wu;Lingjun Li;Jin-hui Li;