Core-shell nanostructured SiO2@a-TiO2@Ag composite with high capacity and safety for Li-ion battery anode

Ding, Mengzhao; Miao, Xuelong; Cao, Lijie; Zhang, Chaomin; Ping, Yunxia

doi:10.1016/j.matlet.2021.131276

Cited by 8 publications

(2 citation statements)

References 9 publications

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“…The peak of carbon is present due to the mounting base. The binding energy related to the different valence states of constituent material (Si 2s, Si 2p, O1s, Ti 2p) is validated with the literature [22,23]. profiles of Si@TiO2 for 1 st , 2 nd and 50 th cycle (c) Capacity retention curve for Si@TiO2 and bare silicon (d) Comparison of capacity retention curve for Si@TiO2 developed through the peptization and sol-gel method [24] The anodic (de-lithiation) and cathodic (lithiation) peaks of the developed core-shell (Si@TiO2) nano-material are shown in CV profile, Fig 4a . In the first cycle, a hump is observed during the lithiation process at 0.7 V due to the SEI formation.…”

Section: Resultsmentioning

confidence: 81%

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Vats,

Gupta,

Gupta

et al. 2023

MSF

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Electric vehicles (EVs) have a significant advantage in terms of energy efficiency and environmental friendliness. In lithium-ion batteries, silicon is seeking more attention than graphite-based anodes due to its high storage capacity. However, it faces severe structural degradation due to volume expansion which is responsible for fast capacity degradation. In the present study, the core shell is developed with the core as silicon and titania as shell (Si@TiO2) and utilized it as an anode in the 2016-coin cell. The material characterization (FE-SEM, TEM, EDS, XRD and XPS) of this developed core-shell material is recorded to confirm its elemental composition and structural validation. The electrochemical performance is measured using cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) test. Cyclic voltammetry profiles reveal the stable lithiation and delithiation process. Initial specific capacity of ≈3180 mAh/g is reported, capacity retention of 61% for the developed core-shell while 34% for the bare silicon is noted over 100 cycles. The proposed method (peptization technique) for the development of core-shell nanoparticles is also compared with the sol-gel approach. The result shows an increment of 5% in capacity retention after 100 cycles by following the peptization technique.

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Section: Resultsmentioning

confidence: 81%

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Vats,

Gupta,

Gupta

et al. 2023

MSF

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“…Anatase titanium dioxide (TiO 2 ) has quite an inferior volume expansion rate and a stable structure [23]. Meanwhile, the Li x TiO 2 , (0 x 1) generated after lithiation has excellent electrical conductivity and good reversibility, which is ideal for composite materials [24][25][26][27][28][29][30][31]. Xin and co-workers prepared a SiO x @TiO 2 @CNF composite with a doubleconstrained structure by electrospinning and sol-gel methods.…”

Section: Introductionmentioning

confidence: 99%

Design of SiO _x /TiO₂@C hierarchical structure for efficient lithium storage

Zou,

Yuan,

Huang

et al. 2023

Nanotechnology

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The large volume expansion effect and unstable SEI films of SiOx-based anode materials have hindered their commercial development. It has been shown that composite doping is a general strategy to solve critical problems. In this study, TiO2-doped core-shell SiOx/TiO2@C composites were created using the sol-gel method. On the one hand, the uniformly dispersed TiO2 nanoparticles can alleviate the volume expansion of the SiOx active material during the lithiation process. On the other hand, they can react with Li+ to form LixTiO2, thereby increasing the ion diffusion rate in the composite material. The outer carbon shell acts as a protective layer that not only alleviate the volume expansion of the composite, but also improve the electron migration rate of the composite. The prepared SiOx/TiO2@C composite has a reversible capacity of 828.2 mA h g-1 828.2 mA h g-1 (0.2 A g-1 100 cycles). After 500 cycles, it still maintains a reversible capacity of 500 mA h g-1 even at a high current density of 2 A g-1. These findings suggest that SiOx/TiO2@C composites have a bright future in applications.

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Constructing a hybrid high-performance photocatalyst by selective laser precisely heating in nanoscale

Yang

Zhu

et al. 2022

Applied Surface Science

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Core-shell nanostructured SiO2@a-TiO2@Ag composite with high capacity and safety for Li-ion battery anode

Cited by 8 publications

References 9 publications

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Design of SiO _x /TiO₂@C hierarchical structure for efficient lithium storage

Constructing a hybrid high-performance photocatalyst by selective laser precisely heating in nanoscale

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Core-shell nanostructured SiO2@a-TiO2@Ag composite with high capacity and safety for Li-ion battery anode

Cited by 8 publications

References 9 publications

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Investigation of Peptization Technique to Synthesize Si@TiO<sub>2</sub> for a Li-Ion Battery Anode Material

Design of SiO x /TiO2@C hierarchical structure for efficient lithium storage

Constructing a hybrid high-performance photocatalyst by selective laser precisely heating in nanoscale

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Design of SiO _x /TiO₂@C hierarchical structure for efficient lithium storage