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 |
ISSN | 0925-8388 |
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 |
DOI | 10.1016/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 | |
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 |
推荐引用方式 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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