摘要
以二元金属氧化物CoFe_(2)O_(4)为研究对象,通过次序模板法制备了CoFe_(2)O_(4)中空多壳层结构(HoMS)材料;对其形貌、结构进行了表征;考察了壳层结构与电化学性能之间的关系.电化学测试结果表明,双壳层-核CoFe_(2)O_(4)中空球具有最高的放电比容量(1354.4 mA·h/g)、优异的倍率性能和循环稳定性,其独特的结构优势和最优的空腔体积占有率使其在多次循环过程中能始终保持结构和电化学性质的稳定.
Binary transition metal oxides have attracted significant attention as high-performance lithium ion battery electrode materials,due to their excellent electrochemical activities.However,the poor cycling stability of the material limits its practical application.In this study,we synthesized CoFe_(2)O_(4)hollow multishelled structure(HoMS)material by sequential templating approach,and characterized its morphology and structure.In addition,the relationship between shell structure and battery performance is well studied.It is demonstrated that double-shelled core CoFe_(2)O_(4)HoMS has the highest discharge capacity(1354.4 mA·h/g),excellent rate performance and cycle stability.The outstanding electrochemical performance is mainly attributed to its unique structural advantages and optimal cavity volume occupancy,which enables it to maintain good structure stability and beneficial electrochemical properties during the repeated cycling.
作者
毕如一
赵吉路
王江艳
于然波
王丹
BI Ruyi;ZHAO Jilu;WANG Jiangyan;YU Ranbo;WANG Dan(Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第1期272-279,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21820102002,21931012,51932001,51872024)
中国科学院洁净能源创新研究院合作基金(批准号:DNL202020)
国家重点研发计划项目(批准号:2021YFC2902500,2018YFA0703503)资助。
