La2(MoO4)3@C as novel anode for lithium ion battery: Structural and chemical evolutions upon electrochemical cycling

被引:22
作者
Jiang, Cheng [1 ]
Liu, Tingting [1 ]
Zheng, Runtian [1 ]
Peng, Na [1 ]
Zhang, Jundong [1 ]
Cheng, Xing [1 ]
Yu, Haoxiang [1 ]
Shui, Miao [1 ]
Shu, Jie [1 ]
机构
[1] Ningbo Univ, Fac Mat Sci & Chem Engn, Ningbo 315211, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium-ion batteries; Anode material; La-2(MoO4)(3); Carbon coating; Electrochemical reaction mechanism; FACILE FABRICATION; STORAGE PROPERTIES; RECENT PROGRESS; ENERGY-STORAGE; MMOO4; M; PERFORMANCE; COMPOSITE; NANOPARTICLES; NANORODS; NI;
D O I
10.1016/j.ceramint.2019.01.079
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
La-2(MoO4)(3) is a kind of transition metal molybdate. It has been proved to be a possible anode material for lithium ion batteries due to the high theoretical capacity. In this work, molybdenum-based La-2(MoO4)(3) material is successfully synthesized through a traditional solid-state reaction method. Carbon-coated La-2(MoO4)(3) is designed by using glucose as carbon source. By comparing the carbon-coated La-2(MoO4)(3) with the carbon-free La-2(MoO4)(3), carbon-coated La-2(MoO4)(3) delivers better cyclic stability and rate performance. Carbon-coated La-2(MoO4)(3) obtains a reversible charge capacity of 525.9 mA h g(-1) at 100 mA g(-1) after 100 cycles, corresponding to capacity retention of 75.2%. However, the capacity retention of carbon-free La-2(MoO4)(3) is only 33.4%. The results indicate that carbon layer can evidently alleviate the irreversibility of structure and improve capacity retention of La-2(MoO4)(3). It demonstrates that the carbon-coated La-2(MoO4)(3) composite can be a possible anode candidate for high capacity lithium ion batteries. In addition, in-situ X-ray diffraction investigation (XRD), ex-situ X-ray photoelectron spectroscopy (XPS), and ex-situ transmission electron microscopy (TEM) are employed to analyze the electrochemical behavior during process of cycling. These experimental results indicate that the conversion behavior of La-2(MoO4)(3) upon lithiation/delithiation is a process of structural pulverization. Based on that, our work provides guidance for the research of molybdenum-based electrode materials.
引用
收藏
页码:7754 / 7760
页数:7
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