A Flexible and Conductive Binder with Strong Adhesion for High Performance Silicon‐Based Lithium‐Ion Battery Anode

Tang, Rongbiao; Ma, Lei; Zheng, Xiao Hu; Shi, Yongji; Zeng, Xiangyu; Wang, Xiaoyu; Wei, Liangming

doi:10.1002/celc.201902152

Cited by 47 publications

(32 citation statements)

References 47 publications

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“…The highfrequency semicircle can be approximated as the interface transfer impedance on surface of the silicon electrode, which directly reflects the diffusion and transport of lithium ions on the liquid-solid between electrolyte and electrode, through the dynamic process of SEI and reaction on surface of Si particle surface. [29,30] It can be clearly seen from the EIS curves that the transfer impedance is significantly high for electrolyte without LiDFP, but it can significantly decrease when the ratio of 0.5 wt.% is added in it. After the ratio is further increased to 1 wt.% or 2 wt.%, the impedance is also reduced slightly.…”

Section: Resultsmentioning

confidence: 99%

“…As we know, a typical EIS curve composed of three parts for half‐cell: (i) semicircle at high‐frequency, (ii) semicircle at middle‐frequency, (iii) straight line at low‐frequency. The high‐frequency semicircle can be approximated as the interface transfer impedance on surface of the silicon electrode, which directly reflects the diffusion and transport of lithium ions on the liquid‐solid between electrolyte and electrode, through the dynamic process of SEI and reaction on surface of Si particle surface . It can be clearly seen from the EIS curves that the transfer impedance is significantly high for electrolyte without LiDFP, but it can significantly decrease when the ratio of 0.5 wt.% is added in it.…”

Section: Resultsmentioning

confidence: 99%

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Lithium Difluorophosphate as an Effective Additive for Improving the Initial Coulombic Efficiency of a Silicon Anode

Zhu

Lao

et al. 2020

ChemElectroChem

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Silicon anodes usually endure low initial coulombic efficiency (ICE) in applications for lithium-ion batteries (LIBs), although the volume expansion and structural stability has been greatly improved under many efforts in the recent years. During the first charge and discharge, a large number of lithium ions can participate in the formation of a solid electrolyte interface (SEI) on anode surface, such as LiF, Li 2 CO 3 and many Li-based compounds, resulting in low efficiency, particularly as the nanosized silicon is widely applied to solve the volume effect. Herein, we find that the lithium difluorophosphate (LiPO 2 F 2 , LiDFP) additive shows some special properties, which greatly improve the reversible capacity in the first discharge. The silicon nanoparticles can deliver an ICE of 70.6 % with 2 wt% LiDFP in the electrolyte, which is increased by 17.7 % compared with the cell without LiDFP (ca. 52.9 %). By comparing the XPS and NMR results, it appears the LiDFP may reduce the number of lithium ions involved in the SEI reaction in the electrolyte during the first discharge, and thus the ICE can be improved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Lithium Difluorophosphate as an Effective Additive for Improving the Initial Coulombic Efficiency of a Silicon Anode

Zhu

Lao

et al. 2020

ChemElectroChem

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“…Due to the inherent high conductivity, excellent stretchability, and ductility, CG binder could accommodate the large volume change of SiNPs, and maintain the mechanical integrity and high electrical conductivity of overall electrode, so that enable the stable cycling of SiNP anodes with high Si mass loading. Finally, due to the water‐solubility and conductive property, PEDOT: PSS has also been widely employed to construct 3D interconnected composite binders for Si‐based anodes combined with other water‐soluble polymer binders or functional materials 61,138,201‐204 …”

Section: Designing Of Polymer Binders For Si‐based Anodesmentioning

confidence: 99%

“…Finally, due to the water-solubility and conductive property, PEDOT: PSS has also been widely employed to construct 3D interconnected composite binders for Sibased anodes combined with other water-soluble polymer binders or functional materials. 61,138,[201][202][203][204]…”

Section: Pedot: Pss-based Conductive Bindersmentioning

confidence: 99%

Advances of polymer binders for silicon‐based anodes in high energy density lithium‐ion batteries

Zhao

Yue²,

Li³

et al. 2021

InfoMat

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208

151

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Conventional lithium‐ion batteries (LIBs) with graphite anodes are approaching their theoretical limitations in energy density. Replacing the conventional graphite anodes with high‐capacity Si‐based anodes represents one of the most promising strategies to greatly boost the energy density of LIBs. However, the inherent huge volume expansion of Si‐based materials after lithiation and the resulting series of intractable problems, such as unstable solid electrolyte interphase layer, cracking of electrode, and especially the rapid capacity degradation of cells, severely restrict the practical application of Si‐based anodes. Over the past decade, numerous reports have demonstrated that polymer binders play a critical role in alleviating the volume expansion and maintaining the integrity and stable cycling of Si‐based anodes. In this review, the state‐of‐the‐art designing of polymer binders for Si‐based anodes have been systematically summarized based on their structures, including the linear, branched, crosslinked, and conjugated conductive polymer binders. Especially, the comprehensive designing of multifunctional polymer binders, by a combination of multiple structures, interactions, crosslinking chemistries, ionic or electronic conductivities, soft and hard segments, and so forth, would be promising to promote the practical application of Si‐based anodes. Finally, a perspective on the rational design of practical polymer binders for the large‐scale application of Si‐based anodes is presented.

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“…The conductive polymer with both high specific capacity and cycle stability for the Si anode was reported. [ 62 ] Up to now, various types of conductive binders with different crosslinked structures have been reported [56b,63] …”

Section: Efficient Strategies Toward Si Anodesmentioning

confidence: 99%

Challenges and Recent Progress on Silicon‐Based Anode Materials for Next‐Generation Lithium‐Ion Batteries

et al. 2021

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The electrode materials are the most critical content for lithium‐ion batteries (LIBs) with high energy density for electric vehicles and portable electronics. Considering the high abundance, environmental friendliness, low cost, high capacity, and low operation potential of silicon‐based anode, it has been intensively studied as one of the most promising anode materials for high‐energy LIBs. However, the widespread application of silicon anode is impeded by the poor electrical conductivity, large volume variation, and unstable solid–electrolyte interfaces films. In the past decade, significant efforts have been demonstrated to tackle these major challenges toward industrial applications. Herein, the focus is on combining with advanced structure like nanostructure and composite with other materials, exploring various new polymer binders, improving electrolyte, different prelithiation strategies, and Si/graphite design to meet commercialization requirements, particularly summarized the progress on areal capacity, initial Coulombic efficiency, and cost. Finally, the guidelines and trends for practical silicon electrodes are presented based on the recent reports.

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A Flexible and Conductive Binder with Strong Adhesion for High Performance Silicon‐Based Lithium‐Ion Battery Anode

Cited by 47 publications

References 47 publications

Lithium Difluorophosphate as an Effective Additive for Improving the Initial Coulombic Efficiency of a Silicon Anode

Lithium Difluorophosphate as an Effective Additive for Improving the Initial Coulombic Efficiency of a Silicon Anode

Advances of polymer binders for silicon‐based anodes in high energy density lithium‐ion batteries

Challenges and Recent Progress on Silicon‐Based Anode Materials for Next‐Generation Lithium‐Ion Batteries

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