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原位模板牺牲法制备富锂锰基材料Li[Li0.2Ni0.2Mn0.6]O2及性能研究
Alternative TitleSynthesis and Characteristics of Lithium-Rich Manganese-Based Material Li[Li0.2Ni0.2Mn0.6]O2by in Situ Template-Sacrificial Method
刘焱1,2,3,4; 唐道平1,2,3; 张千玉1,2,3; 张灵志(1,2,)
2017-02
Source Publication新能源进展
ISSN2095-560X
Volume5Issue:1Pages:32-39
Abstract采用原位模板牺牲法、溶胶凝胶法和限域共沉淀法三种不同方法分别制备了不同形貌的富锂锰基材料Li[Li0.2Ni0.2Mn0.6]O2(LLO)纳米颗粒。电化学测试和分析显示,使用原位模板牺牲法制备的LLO样品具有更好的比容量、循环稳定性和倍率性能,原因是:(1)制备出具有空心结构的微米球,每个空心球中的空腔能够为Li+储存提供更多的位点,有利于提高材料的比容量;(2)空心结构的微米球具有更大的比表面积和较短的锂离子扩散路径的优点,有效提高了材料的倍率性能;(3)空心结构中的孔隙能减小体积效应对材料的影响,从而保证了结构的稳定性,提高电极材料的循环性能。
Other AbstractLi[Li0.2Ni0.2Mn0.6]O2(LLO)nanoparticles with diffident morphologies were prepared by the in situ templatesacrificial method,sol-gel method and confinement method,respectively.The electrochemical performance data confirmed that the product prepared by in situ template-sacrificial method had the best specific capacity,cycle stability and rate performance.The improved electrochemical performance of this product is due to the following aspects:(1)the cavity ineach hollow sphere can provide many extra active sites for the storage of Li+,which is beneficial for enhancing the specificcapacity;(2)the hollow structure made of nanoparticles often has a larger surface area and a reduced effective diffusion distance for Li+,leading to improved rate capability;(3)the void space in hollow structures may buffer against the local volume change during the lithium insertion/extraction cycling,thus facilitating the structural stability of the electrode material and improving the cyclability.
Keyword锂离子电池 正极 富锂锰基材料 原位模板牺牲法 lithium ion battery cathode lithium-rich manganese-based material in situ template-sacrificial method
DOI10.3969/j.issn.2095-560X.2017.01.005
Language中文
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/16714
Collection中国科学院广州能源研究所
Affiliation1.中国科学院广州能源研究所,广州510640;
2.中国科学院可再生能源重点实验室,广州510640;
3.广东省新能源和可再生能源研究开发与应用重点实验室,广州510640;
4.中国科学院大学,北京100049
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
刘焱,唐道平,张千玉,等. 原位模板牺牲法制备富锂锰基材料Li[Li0.2Ni0.2Mn0.6]O2及性能研究[J]. 新能源进展,2017,5(1):32-39.
APA 刘焱,唐道平,张千玉,&张灵志.(2017).原位模板牺牲法制备富锂锰基材料Li[Li0.2Ni0.2Mn0.6]O2及性能研究.新能源进展,5(1),32-39.
MLA 刘焱,et al."原位模板牺牲法制备富锂锰基材料Li[Li0.2Ni0.2Mn0.6]O2及性能研究".新能源进展 5.1(2017):32-39.
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