On the binding mechanism of CMC in Si negative electrodes for Li-ion batteries

Lestriez, Bernard; Bahri, Syaiful; Sandu, I.; Roué, Lionel; Guyomard, Dominique

doi:10.1016/j.elecom.2007.10.001

Cited by 311 publications

(252 citation statements)

References 21 publications

Supporting

Mentioning

248

Contrasting

Order By: Relevance

mentioning

confidence: 99%

“…7 In particular, binders containing hydroxyl substituents on the backbone, such as polyarcrylic acid (PAA) and carboxymethyl cellulose (CMC), have been reported to have chemical bonding between binder and silicon, ensuring stronger adhesion. [20][21][22][23] Efforts to stabilize the large surface area of nano-structured silicon electrodes have utilized electrolyte additives such as fluoroethylene carbonate (FEC) and vinylene carbonate (VC) which lead to the generation of a more effective SEI.24-30 * Electrochemical Society Active Member. z E-mail: blucht@chm.uri.edu Even though the electrochemical performance of silicon electrodes can be significantly enhanced by the combination of nano-structured silicon, effective binders, and SEI forming electrolyte additives; the capacity retention and efficiency of the silicon electrodes remain insufficient for commercial application.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Capacity Fading Mechanisms of Silicon Nanoparticle Negative Electrodes for Lithium Ion Batteries

Yoon

Nguyen

Seo

et al. 2015

J. Electrochem. Soc.

130

126

View full text Add to dashboard Cite

A thorough analysis of the evolution of the voltage profiles of silicon nanoparticle electrodes upon cycling has been conducted. The largest changes to the voltage profiles occur at the earlier stages (> 0.16 V vs Li/Li + ) of lithiation of the silicon nanoparticles. The changes in the voltage profiles suggest that the predominant failure mechanism of the silicon electrode is related to incomplete delithiation of the silicon electrode during cycling. The incomplete delithiation is attributed to resistance increases during delithiation, which are predominantly contact and solid electrolyte interface (SEI) resistance. The capacity retention can be significantly improved by lowering delithiation cutoff voltage or by introducing electrolyte additives, which generate a superior SEI. The improved capacity retention is attributed to the reduction of the contact and SEI resistance. Due to increasing demands for lithium ion batteries with higher energy density, several electrode materials capable of improving lithium ion capacity have been investigated. Among them, silicon has been steadily highlighted as one of the most promising materials for negative electrodes due to excellent electrochemical properties; large theoretical specific capacity and low working potential.1 While these properties make silicon an interesting electrode material with promise to bring innovation to energy storage devices, other electrochemical behavior such as cycling performance, coulombic efficiency, and capacity retention are insufficient for commercial batteries. In the context of improving the cycling behavior of silicon electrodes, the mechanism of capacity fade has been investigated extensively. Most reported failure mechanisms are based on problems associated with the large volume change which the silicon particle experiences during lithiation and delithiation. The repeated volume expansion/contraction results in cracking or pulverization of the silicon particles during prolonged cycling.1,3-5 Furthermore, it has been reported that volume contraction of silicon particles upon delithiation is accompanied by loss of electric conductivity of the electrode layer since the contracted silicon particles are poorly connected with surrounding conductive carbon additives and current collector.6,7 The failure of the SEI (solid electrolyte interphase) on the silicon electrode, is another key factor for electrochemical reversibility of lithium ion batteries. The SEI layer does not have mechanical tolerance to endure the large volumetric changes during expansion/contraction of the silicon surface. [8][9][10][11][12][13][14] As a result, the electrolyte decomposes continuously to cover newly exposed surface and increase the thickness of the SEI. In addition to the problems due to the large volume changes, low conductivity of silicon and structural stress owing to phase transformation have also been reported to contribute to capacity fading. 15,16 The widespread approach to overcome the aforementioned failures of volume change is to employ nano-structu...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Capacity Fading Mechanisms of Silicon Nanoparticle Negative Electrodes for Lithium Ion Batteries

Yoon

Nguyen

Seo

et al. 2015

J. Electrochem. Soc.

130

126

View full text Add to dashboard Cite

show abstract

“…However, the Si is well known to suffer from severe volume change during reaction with lithium 3 followed by electrochemical and mechanical particle disintegration 2,4 leading to a poor cycling ability. Recent reports have shown that the use of amorphous 5 or nanostructured Si, 6 and carboncoating 7,8 or carbon composite, [9][10][11] and the use of advanced elastic binder [12][13][14] and electrolyte composition 15,16 yields enhancement of cycling ability. It still however remains a great challenge to develop new approaches for obtaining a reliable performance of lithium-ion batteries employing Si-based anodes.…”

mentioning

confidence: 99%

Self-organized Artificial SEI for Improving the Cycling Ability of Silicon-based Battery Anode Materials

Min¹,

Bae²,

Kim³

et al. 2013

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Silicon (Si)-based materials are considered as potential alternative anode materials to graphite for a use in the lithium-ion batteries for electric vehicles and energy storage systems because of superior theoretical capacity of 3759 mAhg −1 at room temperature 1,2 and appropriate operation voltages of a few hundreds milivolts above lithium. However, the Si is well known to suffer from severe volume change during reaction with lithium 3 followed by electrochemical and mechanical particle disintegration 2,4 leading to a poor cycling ability. Recent reports have shown that the use of amorphous 5 or nanostructured Si, 6 and carboncoating 7,8 or carbon composite, 9-11 and the use of advanced elastic binder 12-14 and electrolyte composition 15,16 yields enhancement of cycling ability. It still however remains a great challenge to develop new approaches for obtaining a reliable performance of lithium-ion batteries employing Si-based anodes.Our earlier work showed that the interfacial reaction between LiPF 6 of commercial electrolyte and the Li x Si deleteriously affects cycling performance.17-20 The interfacial reaction did not provide the formation of a stable solid electrolyte interphase (SEI) layer at the Si surface but deactivates the Si gradually with cycling by surface coverage with PF-containing species together with LiF salt, while accelerating irreversible particle disintegration and a consequent and dynamic change in the active surface area. We have proposed that interfacial control is a promising approach for improving the cycling ability of Si-based anodes, which was determined based on a basic understanding of electrode-electrolyte interfacial reactions and its impacts on structural degradation and performance fade via electrochemical and interfacial studies of film model electrodes. Surface protection of Si was necessary both to prevent the attack by LiPF 6 -derived species and to form a stable SEI layer. 17-20In the present work, we demonstrate that the cycling ability of Si nanoparticle anode is improved via a new approach of interfacial control. In order to suppress direct interfacial contact between Si and electrolyte while protecting the Si surface, we build up siloxane network as an artificial SEI at the surface of bulk Si active material, utilizing self-organized condensation reaction between alkoxy groups of silane molecules and hydroixde or oxygen groups of Si surface. The Si nanoparticles and composite with graphite decorated with an artificial SEI show significantly improved cycling stability.Building up of an artificial SEI with siloxane network is simply made first by dispersing commercial Si nanoparticles in the solution of tris(2-methoxyethoxy)vinylsilane (hereafter TMVS) using ultrasonication. The presence of a trace of water in the electrolyte assists the hydrolysis and polycondensation of silanes forming the siloxane network at the Si surface.

show abstract

“…Therefore, it will be beneficial to develop binders that can be processed with less toxic, or even non-toxic solvents. Recently, it was reported that water-based binder such as styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) effectively improves the cycling stability of silicon electrode [15][16][17][18][19][20][21][22][23][24][25][26] . According to a previous report by Hochgatterer et al [21] , the formation of a covalent chemical bond between the CMC and silicon particle plays an important role in the effective binding and improved performance.…”

Section: Introductionmentioning

confidence: 99%

Organic Solvent Free Process to Fabricate High Performance Silicon and Graphite Composite Anode

Xiao¹,

Zheng²,

Liu³

2018

Preprint

View full text Add to dashboard Cite

Abstract:Cycling reliability is crucial for Si-based materials due to severe volume change during cycles that results in the fast capacity fading. Though the binder only occupies a very low amount of the total mass of anodes, it is proved to perform a key parameter to improve the cycle performance of Si-based anodes. Because they are eco-friendly and cost saving, water-based binders styrene-butadiene rubber (SBR) and carboxymethyl cellulose (CMC) are regarded as the better binder to substitute Poly (vinylidene difluoride) (PVDF) as the binder for Si-based anode. In this study, the anodes are fabricated by simply mixing the active materials (naso Si, graphite and conductive additive) together and using the mixture of SBR and CMC as a binder. The results showed that the retention capacities of the anodes are more than 440 mAh/g after 400 cycles. It indicates that it is an easy and simple way to make high performance anodes.

show abstract

On the binding mechanism of CMC in Si negative electrodes for Li-ion batteries

Cited by 311 publications

References 21 publications

Capacity Fading Mechanisms of Silicon Nanoparticle Negative Electrodes for Lithium Ion Batteries

Capacity Fading Mechanisms of Silicon Nanoparticle Negative Electrodes for Lithium Ion Batteries

Self-organized Artificial SEI for Improving the Cycling Ability of Silicon-based Battery Anode Materials

Organic Solvent Free Process to Fabricate High Performance Silicon and Graphite Composite Anode

Contact Info

Product

Resources

About