Core-shell Ni0.5TiOPO4/C composites as anode materials in Li ion batteries

被引：19

作者：

Zhang, X. J. ^{[1
]}

Zhang, Y. ^{[1
]}

Zhou, Z. ^{[1
]}

Wei, J. P. ^{[1
]}

Essehli, R. ^{[2
,3
]}

El Bali, B. ^{[3
]}

机构：

[1] Nankai Univ, Minist Educ, Inst New Energy Mat Chem, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China

[2] Univ Nantes, Ecole Mines Nantes, CNRS, SUBATECH,IN2P3,Unite Mixte Rech 6457, F-44307 Nantes 3, France

[3] Univ Mohamed I, Fac Sci, Dept Chem, LMSAC, Oujda 60000, Morocco

来源：

ELECTROCHIMICA ACTA | 2011年 / 56卷 / 05期

关键词：

Ni0.5TiOPO4/C; Lithium-ion batteries; Core-shell; Anode materials; ELECTROCHEMICAL PERFORMANCES; CATHODE MATERIALS; CRYSTAL-STRUCTURE; LITHIUM; NANOCOMPOSITE; FE; INTERCALATION; TEMPERATURE; PHOSPHATES; ELECTRODE;

D O I：

10.1016/j.electacta.2010.12.033

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pristine Ni0.5TiOPO4 was prepared via a traditional solid-state reaction, and then Ni0.5TiOPO4/C composites with core-shell nanostructures were synthesized by hydrothermally treating Ni0.5TiOPO4 in glucose solution. X-ray diffraction patterns indicate that Ni0.5TiOPO4/C crystallizes in monoclinic P2(1)/c space group. Scanning electron microscopy and transmission electron microscopy show that the small particles with different sizes are coated with uniform carbon film of similar to 3 nm in thickness. Raman spectroscopy also confirms the presence of carbon in the composites. Ni0.5TiOPO4/C composites presented a capacity of 276 mAh g(-1) after 30 cycles at the current density of 42.7 mA g(-1), much higher than that of pristine Ni0.5TiOPO4 (155 mAh g(-1)). The improved electrochemical performances can be attributed to the existence of carbon shell. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2290 / 2294

页数：5

共 34 条

[1] Structural and lithium intercalation studies of Mn(0.5-x)CaxTi2(PO4)3 phases (0≤x≤0.50) [J].