Ion-Cross-Linking-Promoted High-Performance Si/PEDOT:PSS Electrodes: The Importance of Cations’ Ionic Potential and Softness Parameters

Liu, Xuejiao; Iqbal, Asma; Ali, Nazakat; Qi, Rongrong; Qian, Xuefeng

doi:10.1021/acsami.0c00755

Cited by 23 publications

(23 citation statements)

References 35 publications

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“…Qian et al studied the crosslinking of electrically conductive PEDOT: PSS polymer by multivalent cations in the 5th period and Group 2, including Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , In 3+ , Sn 4+ (Figure 20E). 167 They found that the variation trend of viscosity and conductivity of crosslinked PEDOT: PSS was consistent with that of ionic potential and softness parameters. Especially, the Sn 4+ crosslinked PEDOT: PSS binder displayed more increased viscosity, electrical conductivity, and mechanical properties due to the higher ionic potential and positive softness parameter of Sn 4+ .…”

Section: Designing Of Polymer Binders For Si‐based Anodesmentioning

confidence: 57%

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

Zhao

Yue²,

Li³

et al. 2021

InfoMat

202

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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Section: Designing Of Polymer Binders For Si‐based Anodesmentioning

confidence: 57%

Section: Designing Of Polymer Binders For Si‐based Anodesmentioning

confidence: 99%

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

Zhao

Yue²,

Li³

et al. 2021

InfoMat

202

151

View full text Add to dashboard Cite

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“…This means that the 3D interconnected carbon‐net can provide a lower and stable interfacial resistance and effectively enhance the conductivity of the silicon‐based materials. [ 47,48 ] As shown in Figure 5b, Si@void@C/C‐2 electrode is activated by current density of 0.4 A g −1 , followed by the current density of 1.0 A g −1 . The anode can still maintain 480 mA h g −1 charge capacity after 1000 cycles, which is 1.29 times higher than the theoretical capacity of artificial graphite (372 mA h g −1 ).…”

Section: Resultsmentioning

confidence: 99%

Facile and Scalable Synthesis of Si@void@C Embedded in Interconnected 3D Porous Carbon Architecture for High Performance Lithium‐Ion Batteries

Tan

Liu

et al. 2021

Part & Part Syst Charact

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Si‐based materials possess huge potential as an excellent anode material for Li‐ion batteries. However, how to realize scalable synthesis of Si‐based anode with a long cycling life and high‐performance is still a critical challenge. Here a water‐in‐oil microemulsion process followed by UV illumination, calcination, and hydrothermal method to produce yolk‐shell Si@void@C embedded in interconnected 3D porous carbon network architecture using silicon nanoparticles is reported. As a result, the sample Si@void@C/C‐2 electrode has achieved a reversible capacity of 1160 mA h g−1 at 0.2 A g−1 after 300 cycles and a stable long cycling life of 480 mA h g−1 at 1 A g−1 after 1000 cycles. A full battery with the synthesized anode shows a capacity of 128 mA h g−1 at 0.2 A g−1 as well as good cycling stability after 1100th cycles. Such excellent electrochemical performance is ascribed to its unique structure, the yolk‐shell void space, highly robust carbon shells and interconnected porous carbon nets that can improve the conductivity of the electrode, buffer the volume expansion, and also suppress Si nanoparticles stress variation. This water‐in oil system makes it possible for mass production of environmentally friendly synthesis of core–shell structure.

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“…In addition to sodium alginate, this method can also be used in other binders to improve their performance. [117] For example, the cross-linking effect of polyvalent cations of the fifth period in the periodic table and polyvalent cations of the second main group on the Si/PEDOT:PSS electrode had been systematically studied [116] (Figure 21). The results show that the changes in viscosity and conductivity are consistent with the ion potential and softness parameters.…”

Section: Polymer Cross-linking With Metal Ionmentioning

confidence: 99%

Key Factors for Binders to Enhance the Electrochemical Performance of Silicon Anodes through Molecular Design

Wang

et al. 2021

Small

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Silicon is considered the most promising candidate for anode material in lithium‐ion batteries due to the high theoretical capacity. Unfortunately, the vast volume change and low electric conductivity have limited the application of silicon anodes. In the silicon anode system, the binders are essential for mechanical and conductive integrity. However, there are few reviews to comprehensively introduce binders from the perspective of factors affecting performance and modification methods, which are crucial to the development of binders. In this review, several key factors that have great impact on binders’ performance are summarized, including molecular weight, interfacial bonding, and molecular structure. Moreover, some commonly used modification methods for binders are also provided to control these influencing factors and obtain the binders with better performance. Finally, to overcome the existing problems and challenges about binders, several possible development directions of binders are suggested.

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Ion-Cross-Linking-Promoted High-Performance Si/PEDOT:PSS Electrodes: The Importance of Cations’ Ionic Potential and Softness Parameters

Cited by 23 publications

References 35 publications

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

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

Facile and Scalable Synthesis of Si@void@C Embedded in Interconnected 3D Porous Carbon Architecture for High Performance Lithium‐Ion Batteries

Key Factors for Binders to Enhance the Electrochemical Performance of Silicon Anodes through Molecular Design

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