Hierarchical mesoporous Li2FeSiO4/C sheaf-rods as a high-performance lithium-ion battery cathode
Zhang, Qingtang; Yan, Chao; Meng, Yan; Wang, Xiaomei
2018-10-30
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
卷号767页码:195-203
摘要Hierarchical mesoporous Li2FeSiO4/C sheaf-rods (HMLFS-SRs) were fabricated using a hard template method with SBA-15 as a silicon source. For comparision, Li2FeSiO4/C nanocomposites (LFS) were prepared using nano-SiO2 under the same conditions. XRD results prove that both the HMLFS-SRs and LFS contain crystalline Li2FeSiO4 and trace amounts of Fe3O4 impurities. The SEM and TEM images indicate that the HMLFS-SRs are hierarchical sheaf rods composed of nanoparticles. EDS data prove that elemental Fe, Si, O and C are uniformly distributed throughout the whole Li2FeSiO4/C sheaf rod. Nitrogen adsorption/desorption analyses further indicate that the HMLFS-SRs are typical mesoporous materials with an external surface area of 47 m(2) g(-1), which is higher than that of the LFS (31 m(2) g(-1)). These unique structures enable the HMLFS-SRs to exhibit much better electrochemical performance than the LFS. The HMLFS-SRs deliver a high discharge capacity of 206.6 mAh g(-1) at 0.1 C. In addition, the HMLFS-SRs also have good cycling performance, satisfactory rate performance, a low charge transfer resistance and a large lithium-ion diffusion coefficient. (C) 2018 Elsevier B.V. All rights reserved.
关键词SBA-15 Lithium iron silicate Cathode material Lithium-ion battery
DOI10.1016/j.jallcom.2018.07.105
收录类别SCI ; SCIE
语种英语
资助项目Gansu Provincial Science Fund[1606RJZA180] ; National Nature Science Foundation of China[21466020]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号WOS:000446316500024
出版者ELSEVIER SCIENCE SA
EI入藏号20182905554190
EI主题词Lithium-ion batteries
EI分类号549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 761 Nanotechnology - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds
引用统计
被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符https://ir.lut.edu.cn/handle/2XXMBERH/32380
专题石油化工学院
材料科学与工程学院
通讯作者Wang, Xiaomei
作者单位Lanzhou Univ Technol, Sch Petrochem Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
第一作者单位兰州理工大学
通讯作者单位兰州理工大学
第一作者的第一单位兰州理工大学
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GB/T 7714
Zhang, Qingtang,Yan, Chao,Meng, Yan,et al. Hierarchical mesoporous Li2FeSiO4/C sheaf-rods as a high-performance lithium-ion battery cathode[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,767:195-203.
APA Zhang, Qingtang,Yan, Chao,Meng, Yan,&Wang, Xiaomei.(2018).Hierarchical mesoporous Li2FeSiO4/C sheaf-rods as a high-performance lithium-ion battery cathode.JOURNAL OF ALLOYS AND COMPOUNDS,767,195-203.
MLA Zhang, Qingtang,et al."Hierarchical mesoporous Li2FeSiO4/C sheaf-rods as a high-performance lithium-ion battery cathode".JOURNAL OF ALLOYS AND COMPOUNDS 767(2018):195-203.
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