刘金龙,杨军,郭少帅,王永刚,王丛笑,刘海梅,徐群杰,夏永姚.Li 含量对球形富锂正极材料结构和电化学性能的影响[J].表面技术,2015,44(1):15-23,40.
LIU Jin-long,YANG Jun,GUO Shao-shuai,WANG Yong-gang,WANG Cong-xiao,LIU Hai-mei,XU Qun-jie,XIA Yong-yao.Effects of Lithium Content on the Structure and Electrochemical Performance of Spherical Lithium-rich Cathode Materials[J].Surface Technology,2015,44(1):15-23,40 |
| Li 含量对球形富锂正极材料结构和电化学性能的影响 |
| Effects of Lithium Content on the Structure and Electrochemical Performance of Spherical Lithium-rich Cathode Materials |
| 投稿时间：2015-01-01 修订日期：2015-01-20 |
| DOI： |
| 中文关键词: 电池 富锂正极材料 层状 球形 局域结构 |
| 英文关键词:batteries lithium-rich cathode materials layered spherical local structure |
| 基金项目:科技部纳米重大专项(2011CB935903);国家自然科学基金项目(21333002 and 20925312);上海市科委基础重点项目(13JC1407900,10JC1401500,08DZ2270500) |
| 作者 | 单位 |
| 刘金龙 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
| 杨军 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
| 郭少帅 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
| 王永刚 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
| 王丛笑 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
| 刘海梅 | 上海电力学院, 上海 200215 |
| 徐群杰 | 上海电力学院, 上海 200215 |
| 夏永姚 | 复旦大学, 能源材料化学协同创新中心, 新能源研究院,上海市分子催化与功能材料重点实验室, 化学系, 上海 200433 |
|
| Author | Institution |
| LIU Jin-long | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
| YANG Jun | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
| GUO Shao-shuai | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
| WANG Yong-gang | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
| WANG Cong-xiao | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
| LIU Hai-mei | Shanghai University of Electric Power, Shanghai 200215, China |
| XU Qun-jie | Shanghai University of Electric Power, Shanghai 200215, China |
| XIA Yong-yao | Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Institute of New Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China |
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| 中文摘要: |
| 富锂正极材料已经成为高能量密度锂离子电池最具有前景的正极材料之一。 然而,富锂正极材料电化学性能对其本体和表面的局域结构很敏感,而这些结构跟材料的合成过程密切相关。 在目前的工作中,从合成的角度提出了新的思路,Li 含量 x 将影响着富锂 Li1. 2xMn0. 54Ni0. 13Co0. 13O2 材料的结构特性和电化学性能。 基于电化学,XRD,Raman, XPS 技术的分析结果,改变 Li 含量将在材料的本体和表面产生尖晶石相和 Li2CO3 物种,会造成所合成的材料局部组分发生变化,进而影响其电压容量曲线。 实验结果表明,在正极材料合成的过程中,相比于其他含量,Li 含量过量 5% (摩尔分数)所合成的样品表现出更好的电化学性能,放电容量高达 270 mAh / g。 |
| 英文摘要: |
| Lithium-rich cathode materials have become one of the most promising cathode materials for high-energy-density lithium-ion batteries. However, the electrochemical properties of lithium-rich cathode materials are highly sensitive to the local structure in the bulk and at the surface, which is closely associated with the synthesis process. In the present work, we provided new insights into the structural properties and corresponding electrochemical performance of Li1. 2xMn0. 54Ni0. 13Co0. 13O2 materials as a function of x (Li content) from a synthesis point of view. The spinel and Li2CO3 species in the bulk and at the surface arising from the varying amounts of lithium ions would result in the local compositional change within the as-prepared particles and provoke a change in the voltage-capacity profile as determined by electrochemical analysis, XRD, Raman, and XPS observations. Our results revealed that the as-prepared sample with 5% excess of Li in molar ratio utilized for the material synthesis showed better electrochemical performance in terms of discharge capacity ( ~270 mAh/ g) and voltage in comparison to other as-prepared samples with different Li contents. |
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