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赵建庆副教授和高立军教授等合作在Journal of Power Sources发表论文

发布者:系统管理员发布时间:2016-12-09浏览次数:332

赵建庆副教授和高立军教授与美国路易斯安那州立大学Ying Wang课题组等合作在Journalof Power Sources (IF 6.333)上发表研究论文


标题: TailorableElectrochemical Performance of Spinel Cathode Materials via In-situ Integratinga Layered Li2MnO3 Phase for Lithium-Ion Batteries

 

作者: Jianqing Zhao,* Hao Wang,Zhiqiang Xie, Sara Ellis, Xiaoxiao Kuai, Jun Guo, Xing Zhu, Ying Wang,* andLijun Gao*

 

 

论文摘要:Electrochemicalperformances of spinel cathode materials have been evaluated in a broad voltagerange of 2.0-4.8 V vs. Li/Li+ via in-situ integrating a layered Li2MnO3 phase for high-voltage and high-capacity lithium ion batteries. Effects of sintering temperatures on manipulatinghybrid spinel-layered structures have been systematically studied during thedecomposition of nonstoichiometric Li0.65Mn0.59Ni0.12Co0.13Oδ material. The spinel component undergoes a phase transition from an initial Li4Mn5O12-typeto a LiMn1.5Ni0.5O4-type spinel structure under high temperatures above 700 °C;meanwhile the content of layered Li2MnO3 component is increased. Li2MnO3-stabilized spinel-layeredcathodes can deliver the discharge capacity more than 225 mAh/g at 0.1 C and exhibit outstanding capacityretentions above 90 % at 0.5 C (1 C = 250 mA/g) in an extended voltagerange between 2.0 and 4.8 V. In addition to clarify significant Li2MnO3 impacts on improving cycling stability of spinel cathode materials, it isnoticeable that LiMn1.5Ni0.5O4-based spinel materials can effectively suppress the electrochemical activationof the layered Li2MnO3 up to 4.8 V. This work sheds lights on tailoring hybrid structures andmaximizing electrochemical performances of Li2MnO3-basedspinel-layered cathode materials for superior lithium ion batteries.

 

原文链接:http://www.sciencedirect.com/science/article/pii/S0378775316313350

期刊名称:Journal ofPower Sources

///页:Volume 333, pages 43-52