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Optimizing the function of SiOx in the porous Si/SiOx network via a controllable magnesiothermic reduction for enhanced lithium storage
Zhou, Chunyue1,2,3; Liu, Jiuhao1,2; Gong, Xuzhong1,2; Wang, Zhi1,2,3
2021-09-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume874Pages:10
AbstractSilicon anodes hold promise to be a possible candidate to replace graphitic carbon used in practical applications. However, it undergoes a huge volume change in the process of electrochemical alloying, which leads to electrical isolation in the long-term cycle. In this work, we focus on regulating the thermal reduction reaction to change the distribution and relative content of residual SiOx in the network of active materials. By analyzing the structure and composition of the product under different reaction conditions combined with electrochemical performances, it is confirmed that there is still a small amount of residual SiOx embedded in the reduced silicon nanoparticles for the completely reduced products which have a positive effect on the cycle stability, while the SiOx core accelerates the particle breakage under the incomplete reduction condition, which is further confirmed by micrograph of the electrode after cycling. Specifically, 628 mAh g-1 of specific capacity can be retained after 100 cycles for almost pure silicon products reduced by 8 h at 660 degrees C, which is better than commercial nanometer silicon anodes. This work provides a theoretical guidance for the construction of silicon anode by thermal reduction, and is conducive to the expansion of this method for the synthesis of practical silicon matrix. (c) 2021 Elsevier B.V. All rights reserved.
KeywordLithium-ion batteries Thermal reduction Regulation Silicon anodes
DOI10.1016/j.jallcom.2021.159914
Language英语
WOS KeywordION BATTERY ANODES ; AT-C ; NANOSTRUCTURED SILICON ; PERFORMANCE ; CARBON ; COMPOSITES ; STRATEGY
Funding ProjectNational Key R&D Program of China[2018YFC1901801] ; National Natural Science Foundation of China[52074255] ; National Natural Science Foundation of China[51704271] ; National Natural Science Foundation of China[U1702251]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS IDWOS:000653090500004
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48740
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Jiuhao; Wang, Zhi
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Chunyue,Liu, Jiuhao,Gong, Xuzhong,et al. Optimizing the function of SiOx in the porous Si/SiOx network via a controllable magnesiothermic reduction for enhanced lithium storage[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,874:10.
APA Zhou, Chunyue,Liu, Jiuhao,Gong, Xuzhong,&Wang, Zhi.(2021).Optimizing the function of SiOx in the porous Si/SiOx network via a controllable magnesiothermic reduction for enhanced lithium storage.JOURNAL OF ALLOYS AND COMPOUNDS,874,10.
MLA Zhou, Chunyue,et al."Optimizing the function of SiOx in the porous Si/SiOx network via a controllable magnesiothermic reduction for enhanced lithium storage".JOURNAL OF ALLOYS AND COMPOUNDS 874(2021):10.
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