Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries

被引：28

作者：

Rosedhi, Nur Diyana ^{[1
]}

Idris, Nurul Hayati ^{[1
]}

Rahman, Md Mokhlesur ^{[2
]}

Din, M. F. Md ^{[3
]}

Wang, Jianli ^{[4
]}

机构：

[1] Univ Malaysia Terengganu, Sch Ocean Engn, Kuala Terengganu 21030, Terengganu, Malaysia

[2] Deakin Univ, Inst Frontier Mat, Waurn Ponds, Vic 3216, Australia

[3] Natl Def Univ Malaysia, Dept Elect & Elect Engn, Fac Engn, Kuala Lumpur 57000, Malaysia

[4] Univ Wollongong NSW, Inst Superconducting & Elect Mat, Wollongong, NSW, Australia

来源：

ELECTROCHIMICA ACTA | 2016年 / 206卷

关键词：

LiNi0.5Mn1.5O4; lithium-ion batteries; cathode materials; glycine; POLYMER PRECURSOR METHOD; SOL-GEL METHOD; ELECTROCHEMICAL PROPERTIES; ANODE MATERIAL; RECHARGEABLE BATTERIES; ASSISTED SYNTHESIS; TEMPERATURE; ELECTRODE; GRAPHENE; STORAGE;

D O I：

10.1016/j.electacta.2016.04.152

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The high voltage LiNi0.5Mn1.5O4 cathode with a disordered spinel structure is synthesized by a glycine-assisted low-temperature reaction follows by a thermal treatment at 750 degrees C, 850 degrees C, and 950 degrees C for 12 h. Glycine is used as a chelating agent for the first time to build required environment for shaping the precursor of LiNi0.5Mn1.5O4 materials. The microstructure and morphology of the LiNi0.5Mn1.5O4 product are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, and transmission electron microscopy. The sample prepares at 750 degrees C reveals small particles with well-defined crystals as confirmed by electron microscopy. Electrochemical results demonstrate that LiNi0.5Mn1.5O4 electrode anneal at 750 degrees C (compare to other two samples) delivers the highest reversible capacity of 110 mAh g(-1) at 0.2C after 100 cycles with good rate capability. The enhanced electrochemical performance could be attributed to the smaller particle sizes as well as well-defined crystals which provide a directional and shorter diffusion path length for Li+ transportation within the crystals. (c) 2016 Elsevier Ltd. All rights reserved.

引用

页码：374 / 380

页数：7

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