Scalable synthesis of Li1.2Mn0.54Ni0.13Co0.13O2/LiNi0.5Mn1.5O4 sphere composites as stable and high capacity cathodes for Li-ion batteries

被引：22

作者：

Yin, Huaqi ^{[1
]}

Ji, Shaomin ^{[1
]}

Gu, Mingzhe ^{[1
]}

Zhang, Liguo ^{[1
]}

Liu, Jun ^{[1
,2
]}

机构：

[1] Xiangtan Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Low Dimens Mat & Applicat Technol, Xiangtan 411105, Peoples R China

[2] S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 103期

基金：

中国国家自然科学基金;

关键词：

LITHIUM BATTERIES; ELECTROCHEMICAL-BEHAVIOR; SURFACE MODIFICATION; ANODE MATERIALS; PERFORMANCE; MN; NANOMEMBRANES; ELECTRODES; OXIDE; NI;

D O I：

10.1039/c5ra17804e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Li-rich materials have become a very promising kind of cathode materials due to their high specific capacities and working potentials. Herein, we successfully synthesized a high voltage cathode of Li1.2Mn0.54Ni0.13Co0.13O2 spheres coated with thin LiNi0.5Mn1.5O4 layers via a simple co-precipitation method. The finally obtained composite cathode was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), clearly confirming that the inner core was completely uniformly coated by the outer shell. X-ray powder diffraction (XRD) and energy dispersive spectrometry (EDS) results show that the products have no other component. The coated composite cathode exhibited a superior rate capacity and stable cycle performance in a voltage range of 2.0-4.8 V. The Li1.2Mn0.54Ni0.13Co0.13O2/LiNi0.5Mn1.5O4 microsphere cathode delivers high capacities of 249.5 and 96 mA h g(-1) at rates of 0.2C and 5C, respectively.

引用

页码：84673 / 84679

页数：7

共 37 条

[1] Demonstrating oxygen loss and associated structural reorganization in the lithium battery cathode Li[Ni0.2Li0.2Mn0.6]O2 [J].