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Mechanically Reinforced Localized Structure Design to Stabilize Solid–Electrolyte Interface of the Composited Electrode of Si Nanoparticles and TiO2 Nanotubes
Ge, Mingzheng1,2; Tang, Yuxin3; Malyi, Oleksandr I.4; Zhang, Yanyan4; Zhu, Zhiqiang4; Lv, Zhisheng4; Ge, Xiang4; Xia, Huarong4; Huang, Jianying1; Lai, Yuekun1; Chen, Xiaodong4
2020-07-01
Source PublicationSmall
ISSN1613-6810
Volume16Issue:30
Abstract

Silicon anode with extremely high theoretical specific capacity (≈4200 mAh g), experiences huge volume changes during Li-ion insertion and extraction, causing mechanical fracture of Si particles and the growth of a solid–electrolyte interface (SEI), which results in a rapid capacity fading of Si electrodes. Herein, a mechanically reinforced localized structure is designed for carbon-coated Si nanoparticles (C@Si) via elongated TiO nanotubes networks toward stabilizing Si electrode via alleviating mechanical strain and stabilizing the SEI layer. Benefited from the rational localized structure design, the carbon-coated Si nanoparticles/TiO nanotubes composited electrode (C@Si/TiNT) exhibits an ideal electrode thickness swelling, which is lower than 1% after the first cycle and increases to about 6.6% even after 1600 cycles. While for traditional C@Si/carbon nanotube composited electrode, the initial swelling ratio is about 16.7% and reaches ≈190% after 1600 cycles. As a result, the C@Si/TiNT electrode exhibits an outstanding capacity of 1510 mAh g at 0.1 A g with high rate capability and long-time cycling performance with 95% capacity retention after 1600 cycles. The rational design on mechanically reinforced localized structure for silicon electrode will provide a versatile platform to solve the current bottlenecks for other alloyed-type electrode materials with large volume expansion toward practical applications.

KeywordLithium-ion Batteries Mechanical Strains Minimizing Thickness Changes Silicon Anodes Solid–electrolyte Interfaces
DOI10.1002/smll.202002094
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Materials Science ; Science & Technology - Other Topics ; Physics
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000539572900001
Scopus ID2-s2.0-85086232968
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Cited Times [WOS]:30   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorTang, Yuxin; Lai, Yuekun; Chen, Xiaodong
Affiliation1.National Engineering Research Center of Chemical Fertilizer Catalyst (NERC-CFC), College of Chemical Engineering, Fuzhou University, Fuzhou, 350116, China
2.National & Local Joint Engineering Research Center of Technical Fiber Composites for Safety and Health, School of Textile and Clothing, Nantong University, Nantong, 226019, China
3.Institute of Applied Physics and Materials Engineering, University of Macau, 999078, Macao
4.Innovative Centre for Flexible Devices (iFLEX), School of Materials Science and Engineering, Nanyang Technological University, Singapore, 50 Nanyang Avenue, 639798, Singapore
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Ge, Mingzheng,Tang, Yuxin,Malyi, Oleksandr I.,et al. Mechanically Reinforced Localized Structure Design to Stabilize Solid–Electrolyte Interface of the Composited Electrode of Si Nanoparticles and TiO2 Nanotubes[J]. Small,2020,16(30).
APA Ge, Mingzheng,Tang, Yuxin,Malyi, Oleksandr I.,Zhang, Yanyan,Zhu, Zhiqiang,Lv, Zhisheng,Ge, Xiang,Xia, Huarong,Huang, Jianying,Lai, Yuekun,&Chen, Xiaodong.(2020).Mechanically Reinforced Localized Structure Design to Stabilize Solid–Electrolyte Interface of the Composited Electrode of Si Nanoparticles and TiO2 Nanotubes.Small,16(30).
MLA Ge, Mingzheng,et al."Mechanically Reinforced Localized Structure Design to Stabilize Solid–Electrolyte Interface of the Composited Electrode of Si Nanoparticles and TiO2 Nanotubes".Small 16.30(2020).
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