Facile synthesis of silicon films by photosintering as anode materials for lithium-ion batteries

Chen, Wei; Jiang, Nan; Fan, Zhiping; Dhanabalan, Abirami; Chen, Chuansheng; Li, Yunjun; Yang, Mohshi

doi:10.1016/j.jpowsour.2012.04.047

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…However, the peak current stays almost the same at the 10th cycle, implying that the activation process of Si is almost completed at the end of 10th cycle. The observed CV curves and the activation process are in good agreement with previous report of porous silicon [32,33,34,35,36]. The reconstruction of crystal structure near silicon surface is explained as the reason for the activation phenomenon [35,36].…”

Section: Resultssupporting

confidence: 90%

“…However, this broad peak disappears in the third cycle. No obvious oxidation peaks corresponding to this reduction process is observed in the anodic branch, which indicates that this peak corresponds to the solid electrolyte interphase (SEI) formation [32,33]. There is a distinctive reduction peak which starts at 0.3 V and becomes quite sharp below 0.1 V. This peak is attributed to the lithiation of silicon [32,33].…”

Section: Resultsmentioning

confidence: 99%

“…No obvious oxidation peaks corresponding to this reduction process is observed in the anodic branch, which indicates that this peak corresponds to the solid electrolyte interphase (SEI) formation [32,33]. There is a distinctive reduction peak which starts at 0.3 V and becomes quite sharp below 0.1 V. This peak is attributed to the lithiation of silicon [32,33]. During charging, two well defined peaks centered at 0.34 and 0.51 V are observed and are ascribed to the formation of intermediate Li x Si and amorphous silicon, respectively [30,31].…”

Section: Resultsmentioning

confidence: 99%

“…However, one of the major drawbacks of silicon is the ~300% volumetric change upon charging and discharging, which results in peeling and pulverization of the electrode and eventual capacity loss. Numerous works have been carried out to address these issues, such as using nano-enabled silicon structures, preparing Si/C composites to improve electric conductivity and constructing porous structure or compositing with other active/non-active matrix to buffer the volume change [30,31,32,33]. Considering the structure stability of LTO, it is expected that LTO can also alleviate some of the volumetric expansion of silicon during the cycling process by acting as a buffer.…”

Section: Introductionmentioning

confidence: 99%

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High Performance Li4Ti5O12/Si Composite Anodes for Li-Ion Batteries

Chen

Agrawal

2015

Nanomaterials

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Improving the energy capacity of spinel Li4Ti5O12 (LTO) is very important to utilize it as a high-performance Li-ion battery (LIB) electrode. In this work, LTO/Si composites with different weight ratios were prepared and tested as anodes. The anodic and cathodic peaks from both LTO and silicon were apparent in the composites, indicating that each component was active upon Li+ insertion and extraction. The composites with higher Si contents (LTO:Si = 35:35) exhibited superior specific capacity (1004 mAh·g−1) at lower current densities (0.22 A·g−1) but the capacity deteriorated at higher current densities. On the other hand, the electrodes with moderate Si contents (LTO:Si = 50:20) were able to deliver stable capacity (100 mAh·g−1) with good cycling performance, even at a very high current density of 7 A·g−1. The improvement in specific capacity and rate performance was a direct result of the synergy between LTO and Si; the former can alleviate the stresses from volumetric changes in Si upon cycling, while Si can add to the capacity of the composite. Therefore, it has been demonstrated that the addition of Si and concentration optimization is an easy yet an effective way to produce high performance LTO-based electrodes for lithium-ion batteries.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High Performance Li4Ti5O12/Si Composite Anodes for Li-Ion Batteries

Chen

Agrawal

2015

Nanomaterials

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“…The severe volume change during Li-ion insertion and extraction may lead to a poor electrical contact between the active material and the current collector, and thus a poor electrochemical performance. A variety of Si nanostructures and their composites, such as thin films [7,8], Si nanoparticles (NPs) [9,10], Si nanowires (NWs) [11,12], Si nanotubes (NTs) [13][14][15], three-dimensional (3D) nanoporous Si frameworks [16], yolk-shell Si nanoparticle-amorphous carbon structures [17,18], Si-carbon nanotubes (CNTs) [19,20] and Si-graphene composites [21,22] have been reported for diminishing the induced failure by volume change and thus improving the stability of Si-based anodes.…”

Section: Introductionmentioning

confidence: 99%

Ultra-thick porous films of graphene-encapsulated silicon nanoparticles as flexible anodes for lithium ion batteries

Yue

Wang

Yang

et al. 2015

Electrochimica Acta

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Mitigation of Volumetric Expansion in Silicon Anodes via Engineered Porosity: Electrochemical Performances and Stress Distribution Implication

Liu,

Zhang,

Xue

et al. 2024

Energy Tech

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To overcome the significant volume expansion issue encountered by traditional silicon anodes in lithium‐ion batteries, this study employs chemical etching techniques to treat aluminum–silicon alloys of various ratios, successfully preparing three types of porous silicon electrode materials with different pore structures. Through a series of electrochemical tests, this article investigates the role of porous silicon structures in improving electrode performance. The results demonstrate that the porous silicon anodes exhibit superior cycle stability and rate capability compared to traditional solid silicon anodes. This confirms the effectiveness of the porous structure in mitigating the significant volume expansion during the charge and discharge process of silicon materials and in preventing premature electrode failure, thereby significantly enhancing the electrode's cycle life. Remarkably, the porous silicon with a high porosity rate shows exceptionally outstanding performance. Additionally, using computer simulations, this study also models the impact of changes in pore size within the porous silicon material at different states of charge and discharge on the stress distribution at the particle center and surface. These experimental and simulation results jointly provide strong empirical evidence for applying porous silicon materials as high‐performance anode materials for lithium‐ion batteries and offer essential guidance for future stress analysis and electrode design of porous silicon electrode materials.

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Facile synthesis of silicon films by photosintering as anode materials for lithium-ion batteries

Cited by 12 publications

References 26 publications

High Performance Li4Ti5O12/Si Composite Anodes for Li-Ion Batteries

High Performance Li4Ti5O12/Si Composite Anodes for Li-Ion Batteries

Ultra-thick porous films of graphene-encapsulated silicon nanoparticles as flexible anodes for lithium ion batteries

Mitigation of Volumetric Expansion in Silicon Anodes via Engineered Porosity: Electrochemical Performances and Stress Distribution Implication

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