Novel conductive binder for high-performance silicon anodes in lithium ion batteries

Liu, Dong; Zhao, Yan; Tan, Rui; Tian, Leilei; Liu, Yidong; Chen, Haibiao; Pan, Feng

doi:10.1016/j.nanoen.2017.04.043

Cited by 193 publications

(139 citation statements)

References 37 publications

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“…Considering that the electronic structures of PFFOMB and PFFO are not largely different, the considerable improvement results from the stronger interaction between PFFOMB and Si, revealing that the binders for Si anodes must have strong supramolecular interactions with the Si surface. Similar conductive binders based on polyfluorene were subsequently reported by introducing other side chains such as triethyleneoxide monomethylester for better electrolyte uptake capability 93 and sodium carboxylic acid for stronger interactions 94 by forming noncovalent bonding between conductive binder and Si surface 95 and also using calendaring technique. 96 Kim et al 97 developed n-type poly(phenanthrenequinone) as a conductive binder for Si electrode.…”

Section: Electrochemically N-doped Conductive Bindersmentioning

confidence: 58%

The emerging era of supramolecular polymeric binders in silicon anodes

2018

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Silicon (Si) anode is among the most promising candidates for the next-generation high-capacity electrodes in Li-ion batteries owing to its unparalleled theoretical capacity (4200 mA h g À1 for Li 4.4 Si) that is approximately 10 times higher than that of commercialized graphitic anodes (372 mA h g À1 for LiC 6 ).The battery community has witnessed substantial advances in research on new polymeric binders for silicon anodes mainly due to the shortcomings of conventional binders such as polyvinylidene difluoride (PVDF) to address problems caused by the massive volume change of Si (300%) upon (de)lithiation. Unlike conventional battery electrodes, polymeric binders have been shown to play an active role in silicon anodes to alleviate various capacity decay pathways. While the initial focus in binder research was primarily to maintain the electrode morphology, it has been recently shown that polymeric binders can in fact help to stabilize cracked Si microparticles along with the solid-electrolyte-interphase (SEI) layer, thus substantially improving the electrochemical performance. In this review article, we aim to provide an in-depth analysis and molecular-level design principles of polymeric binders for silicon anodes in terms of their chemical structure, superstructure, and supramolecular interactions to achieve good electrochemical performance. We further highlight that supramolecular chemistry offers practical tools to address challenging problems associated with emerging electrode materials in rechargeable batteries.

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Section: Electrochemically N-doped Conductive Bindersmentioning

confidence: 58%

The emerging era of supramolecular polymeric binders in silicon anodes

2018

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“…In addition to the highlighted strategies, novel conductive polymer binders such as polyaniline (PANi) hydrogels, poly(3,4‐ethylenedioxythiophene):poly(styrene‐4‐sulfonate) (PEDOT:PSS), poly(aniline‐ co ‐anthranilic acid) (PAAA), and electrolyte additives such as fluoroethylene carbonate (FEC) and vinylene carbonate (VC) were also utilized to improve the electrochemical performance of Si‐based anodes. Novel conducting polymeric binders outperform the most commonly used binders since they integrate dual functions of traditional conductive additives and binders, thereby increasing the electrode volumetric as well as gravimetric capacities . Besides, the conducting polymeric binders can participate in the formation of a smooth and more stable SEI film, which is vital to attain high CE and long‐cycle life in Si‐based anodes.…”

Section: Challenges Of Si‐based Anodes and Strategies To Address Themmentioning

confidence: 99%

Top‐Down Synthesis of Silicon/Carbon Composite Anode Materials for Lithium‐Ion Batteries: Mechanical Milling and Etching

et al. 2020

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“…To address this issue, conducting polymers which have dual functions as a binder and conducting additive have been developed for Si anodes. However, conjugated conductive polymers such as polyaniline and sodium poly[9,9‐bis(3‐propanoate)fluorine] typically exhibit low conductivity at large strains or poor stretchability (Figure c),[4a,17] thereby the battery performances are not desirable for applications. Hence, it is crucial to design and develop novel highly stretchable and conductive binders for large‐capacity Si anodes in order to accomplish large capacity, high capability, and long‐term cycling.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable Conductive Glue for High‐Performance Silicon Anodes in Advanced Lithium‐Ion Batteries

Wang

Liu

Peng

et al. 2017

Adv Funct Materials

124

105

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Binder plays a key role in maintaining the mechanical integrity of electrodes in lithium-ion batteries. However, the existing binders typically exhibit poor stretchability or low conductivity at large strains, which are not suitable for highcapacity silicon (Si)-based anodes undergoing severe volume changes during cycling. Herein, a novel stretchable conductive glue (CG) polymer that possesses inherent high conductivity, excellent stretchablity, and ductility is designed for high-performance Si anodes. The CG can be stretched up to 400% in volume without conductivity loss and mechanical fracture and thus can accommodate the large volume change of Si nanoparticles to maintain the electrode integrity and stabilize solid electrolyte interface growth during cycling while retaining the high conductivity, even with a high Si mass loading of 90%. The Si-CG anode has a large reversible capacity of 1500 mA h g −1 for over 700 cycles at 840 mA g −1 with a large initial Coulombic efficiency of 80% and high rate capability of 737 mA h g −1 at 8400 mA g −1 . Moreover, the Si-CG anode demonstrates the highest achieved areal capacity of 5.13 mA h cm −2 at a high mass loading of 2 mg cm −2 . The highly stretchable CG provides a new perspective for designing next-generation high-capacity and high-power batteries.

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Novel conductive binder for high-performance silicon anodes in lithium ion batteries

Cited by 193 publications

References 37 publications

The emerging era of supramolecular polymeric binders in silicon anodes

The emerging era of supramolecular polymeric binders in silicon anodes

Top‐Down Synthesis of Silicon/Carbon Composite Anode Materials for Lithium‐Ion Batteries: Mechanical Milling and Etching

Highly Stretchable Conductive Glue for High‐Performance Silicon Anodes in Advanced Lithium‐Ion Batteries

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