The Si@C‐Network Electrode Prepared by an In Situ Carbonization Strategy with Enhanced Cycle Performance

Deng, Li; Wu, Zhan; You, Jin Hai; Yin, Zu Wei; Ren, Wen; Zhang, Peng Fang; Xu, Bin; Zhou, Yao; Li, Jun Tao

doi:10.1002/celc.202001388

Cited by 5 publications

(4 citation statements)

References 54 publications

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“…Using fully or partially in situ carbonized polymer binder in the evenly distributed electrode to prepare carbonaceous conductive binder is a novel method. Polymer binders, such as gelatin, [ 76 ] XG, [ 77 ] and PAA, [ 78 ] have been fabricated as electrodes supported by carbonaceous conductive binder by in situ full carbonization. For example, Shao et al.…”

Section: Optimization Strategies For Conductive Bindermentioning

confidence: 99%

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Deng

Zheng

et al. 2022

Advanced Energy Materials

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102

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While silicon is considered one of the most promising anode materials for the next generation of high‐energy lithium‐ion batteries (LIBs), the industrialization of Si anodes is hampered by the anode's large volume change during the charging and discharging process. In comparison to the traditional graphite anode used in LIBs, the Si anode places more stringent demands on the binder, which must maintain intimate contact between the electrode components and the integrity of the ion and electron transport channels when subjected to frequent large volume changes. The purpose of this review is to cover the recent advances in binder design strategies by examining the molecular structure, chemical functionalities, physical and mechanical properties of the binder materials, as well as the working strategies involved. The challenges in the design of the innovative polymer binder for commercializing Si anodes are discussed, as well as the future development direction and application prospects.

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Section: Optimization Strategies For Conductive Bindermentioning

confidence: 99%

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Deng

Zheng

et al. 2022

Advanced Energy Materials

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102

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“…The Si@C-network electrode was prepared by in situ carbonization using the same method as that in our previous paper [8]. 0.05 g Si nanoparticles (Alfa Aesar, 50-100 nm) and 0.05 g xanthan gum (XG) were stirred in deionized water to make a homogenous slurry and then coated on the Cu current collector.…”

Section: Si-based Electrodesmentioning

confidence: 99%

“…The continuous growth of the SEI layer will decrease the conductivity between the Si-particles and the conductive agents and become inactive to the lithiation/delithiation processes. To solve this problem, several strategies have been reported, including the modifications of electrode materials [2][3][4][5][6][7][8], binders [9][10][11][12][13][14][15][16][17], electrolyte solvent [18][19][20][21], salts [22][23][24], and electrolyte additives [19,[25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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Solid Electrolyte Interphase Layer Formation on the Si-Based Electrodes with and without Binder Studied by XPS and ToF-SIMS Analysis

Deng

et al. 2022

Batteries

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The formation and evolution of the solid electrolyte interphase (SEI) layer as a function of electrolyte and electrolyte additives has been extensively studied on simple and model pure Si thin film or Si nanowire electrodes inversely to complex composite Si-based electrodes with binders and/or conductive carbon. It has been recently demonstrated that a binder-free Si@C-network electrode had superior electrochemical properties to the Si electrode with a xanthan gum binder (Si-XG-AB), which can be principally related to a reductive decomposition of electrolytes and formation of an SEI layer. Thus, here, the Si@C-network and Si-XG-AB electrodes have been used to elucidate the mechanism of SEI formation and evolution on Si-based electrodes with and without binder induced by lithiation and delithiation applying surface analytical techniques. The X-ray photoelectron spectroscopy and time-of-flight ion mass spectrometry results demonstrate that the SEI layer formed on the surface of the Si-XG-AB electrode during the discharge partially decomposes during the subsequent charging process, which results in a less stable SEI layer. Contrarily, on the surface of the Si@C-network electrode, the SEI shows less significant decomposition during the cycle, demonstrating its stability. For the Si@C-network electrode, initially, the inorganic and organic species are formed on the surface of the carbon shell and the silicon surface, respectively. These two parts of species in the SEI layer gradually grow and then fuse when the electrode is fully discharged. The behavior of the SEI layer on both electrodes corroborates with the electrochemical results.

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Efficient Ionic Conductor Anode Materials with Heterojunction Structure of MnO_x/Si@C Utilized in Lithium‐Ion Batteries

Liu,

Zheng,

et al. 2024

Advanced Sustainable Systems

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The rapid development of alternative energy vehicles has raised higher requirements for electrode materials. Silicon, with superhigh specific capacity, is highly anticipated in the field of lithium‐ion batteries (LIBs). Unfortunately, the original drawbacks of serious volumetric effect and poor conductivity have confined its commercial steps severely. Herein, a novel composite, based on submicron silicon flakes embedded into carbon shell, with heterojunction‐bearing MnOx nanoparticles, is designed and synthesized successfully via sanding process and in situ thermal reduction methods. The results of electrochemical performance tests and related fitting data show that the presence of MnOx particles facilitates rapid Li+ transport and reduces the impedance associated with Li+ diffusion from the surface to the inner core of the MnOx/Si@C material. The two‐dimensional (2D) silicon flakes and uniform carbon shell have positive influence on structural stability and electronic conductivity. Benefit from the rational design, the optimized MnOx/Si@C composite delivers an outstanding cycling stability of 1106.59 mAh·g−1 at 1 A·g−1 over 1000 cycles with a capacity retention of 71.09%. Besides, the goal material possesses a lithium‐ion diffusion coefficient of ≈1.04×10−9 cm2·s−1. This work provides a reference for the mass preparation of advanced anode materials for lithium‐ion batteries.

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The Si@C‐Network Electrode Prepared by an In Situ Carbonization Strategy with Enhanced Cycle Performance

Cited by 5 publications

References 54 publications

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Solid Electrolyte Interphase Layer Formation on the Si-Based Electrodes with and without Binder Studied by XPS and ToF-SIMS Analysis

Efficient Ionic Conductor Anode Materials with Heterojunction Structure of MnO_x/Si@C Utilized in Lithium‐Ion Batteries

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The Si@C‐Network Electrode Prepared by an In Situ Carbonization Strategy with Enhanced Cycle Performance

Cited by 5 publications

References 54 publications

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Design Criteria for Silicon‐Based Anode Binders in Half and Full Cells

Solid Electrolyte Interphase Layer Formation on the Si-Based Electrodes with and without Binder Studied by XPS and ToF-SIMS Analysis

Efficient Ionic Conductor Anode Materials with Heterojunction Structure of MnOx/Si@C Utilized in Lithium‐Ion Batteries

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Product

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Efficient Ionic Conductor Anode Materials with Heterojunction Structure of MnO_x/Si@C Utilized in Lithium‐Ion Batteries