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题名: Preparing LiNi0.5Mn1.5O4 nanoplates with superior properties in lithium-ion batteries using bimetal-organic coordination-polymers as precursors
作者: Yang, Shifeng1, 2;  Chen, Jian1;  Liu, Yingjia1;  Yi, Baolian1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2014
DOI: 10.1039/c4ta01147c
卷: 2, 期:24, 页:9322-9330
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: LiNi0.5Mn1.5O4 nanoplates were prepared using a two-step method composed of a hydrothermal method and a solid-state reaction. At first, bimetal-organic coordination-polymers containing Ni2+ and Mn2+ were synthesized using the ligand 3,4,9,10-perylenetetracarboxylic dianhydride (ptcda) by a template-assisted self-assembly method in a hydrothermal atmosphere. This was followed by thermal treatment to remove the organic components and then calcination with lithium acetate, and nanoplate-stacked LiNi0.5Mn1.5O4 was obtained. The nanoplate structure shortens the diffusion path of the lithium ions in the bulk of LiNi0.5Mn1.5O4 and then promotes fast charge-discharge properties of the material. In addition, an amorphous Li2CO3 layer with nanometer thickness in situ generated on the surface of the LiNi0.5Mn1.5O4 particles was confirmed by TEM and XPS. This is helpful for suppressing the interfacial side reactions and thereby improving the cycling stability of the material. Owing to these advantages, the LiNi0.5Mn1.5O4/Li2CO3 material exhibits excellent rate capability and cycling stability. The as-prepared material delivers 129.8 mA h g(-1) at a 1 C rate and retains 86.4% of the initial capacity even after 1000 cycles of charge-discharge at 25 degrees C. Even at a high discharge rate of 40 C, the specific capacity of the material is 120.9 mA h g(-1), and the capacity retention is 84.7% over 500 cycles. The high-temperature stability of the material is also superior. When operating at 55 degrees C, the capacity loss by cycle is only 0.037% throughout 250 cycles.
关键词[WOS]: V-CATHODE MATERIAL ;  LONG-CYCLE-LIFE ;  IMPROVED ELECTROCHEMICAL PERFORMANCE ;  HIGH-RATE CAPABILITY ;  55 DEGREES-C ;  ELEVATED-TEMPERATURE ;  LICR0.2NI0.4MN1.4O4 SPINEL ;  STABILIZED LINI0.5MN1.5O4 ;  ORDERED LINI0.5MN1.5O4 ;  SURFACE MODIFICATION
语种: 英语
WOS记录号: WOS:000336850600048
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145600
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Adv Rechargeable Battery Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Yang, Shifeng,Chen, Jian,Liu, Yingjia,et al. Preparing LiNi0.5Mn1.5O4 nanoplates with superior properties in lithium-ion batteries using bimetal-organic coordination-polymers as precursors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(24):9322-9330.
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