Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica | |
Zhang, Qingtang; Yan, Chao; Guo, Junhong; Wang, Xiaomei | |
2018-09 | |
发表期刊 | IONICS |
ISSN | 0947-7047 |
卷号 | 24期号:9页码:2555-2563 |
摘要 | Mesoporous Li2FeSiO4/C nanocomposites (LFS-FNS and LFS-NS) were prepared from fumed nano silica (FNS) and nano silica (NS) through facile solid-state reactions, respectively. XRD analysis indicates that the crystalline structures of LFS-FNS and LFS-NS are indexed to monoclinic Li2FeSiO4 of P2(1). SEM results prove that the particle size of LFS-FNS and FNS (25 similar to 40 nm) is smaller than that of LFS-NS and NS, revealing the particle size of Li2FeSiO4/C nanocomposites can be tuned by choosing different silica. TEM further indicates Li2FeSiO4 nanoparticles are uniformly dispersed in the amorphous carbon networking of LFS-FNS. Pore structure analysis indicates the external surface areas of LFS-FNS as well as LFS-NS are 51.4 and 36.1 m(2) g(-1), indicating the pore properties of mesoporous Li2FeSiO4/C nanocomposites can be controlled by using different silica as silicon resource. The reduced particle size and high external surface area shorten the lithium-ion diffusion path and make LFS-FNS possess better electrochemical performance over LFS-NS. The discharge capacity of LFS-FNS is as high as 172 mA h g(-1) at 0.1 C. |
关键词 | Fumed nano silica Li2FeSiO4 Mesoporous materials Nanostructured materials |
DOI | 10.1007/s11581-017-2399-9 |
收录类别 | SCI |
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 ; Electrochemistry ; Physics |
WOS类目 | Chemistry, Physical ; Electrochemistry ; Physics, Condensed Matter |
WOS记录号 | WOS:000441555200005 |
出版者 | SPRINGER HEIDELBERG |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/32472 |
专题 | 石油化工学院 材料科学与工程学院 省部共建有色金属先进加工与再利用国家重点实验室 |
通讯作者 | Wang, Xiaomei |
作者单位 | Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Sch Petrochem Engn, Lanzhou 730050, Gansu, Peoples R China |
第一作者单位 | 省部共建有色金属先进加工与再利用国家重点实验室 |
通讯作者单位 | 省部共建有色金属先进加工与再利用国家重点实验室 |
第一作者的第一单位 | 省部共建有色金属先进加工与再利用国家重点实验室 |
推荐引用方式 GB/T 7714 | Zhang, Qingtang,Yan, Chao,Guo, Junhong,et al. Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica[J]. IONICS,2018,24(9):2555-2563. |
APA | Zhang, Qingtang,Yan, Chao,Guo, Junhong,&Wang, Xiaomei.(2018).Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica.IONICS,24(9),2555-2563. |
MLA | Zhang, Qingtang,et al."Mesoporous Li2FeSiO4/C nanocomposites with enhanced performance synthesized from fumed nano silica".IONICS 24.9(2018):2555-2563. |
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