A Highly Cross‐Linked Polymeric Binder for High‐Performance Silicon Negative Electrodes in Lithium Ion Batteries

Koo, Bonjae; Kim, Hyun-Jung; Cho, Younghyun; Lee, Kyu‐Tae; Choi, Nam‐Soon; Cho, Jaephil

doi:10.1002/anie.201201568

Cited by 689 publications

(633 citation statements)

References 37 publications

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“…Our group reported a thermally cured polymeric binder as an immediate technological solution for Liion batteries with Si-based electrodes [7]. A threedimensionally interconnected network of PAA and sodium carboxymethyl cellulose (Na-CMC) as a binder was used and a nano-sized silicon anode with this crosslinked binder displayed a high Li extraction capacity that exceeded 2000 mAh g -1 after 100 cycles at 30 o C. The crosslinked polymeric binder (Fig.…”

Section: Crosslinked Polymeric Bindersmentioning

confidence: 99%

“…Cross-linked PAA-CMC (c-PAA-CMC) binder formed by condensation between PAA and CMC. Because the OH moieties of the SiO 2 native layer on the Si surface can react with the COOH groups of PAA in a cross-linked binder, chemical binding between Si nanoparticles and c-PAA-CMC is produced [7]. ume change.…”

Section: Crosslinked Polymeric Bindersmentioning

confidence: 99%

“…To achieve high-energy-density LIBs, silicon (Si) has been extensively investigated as a negative-electrode (anode) material due to its high theoretical specific capacity of 3580 mAh g -1 for Li 15 Si 7 [6][7][8][9][10]. However, the practical application of Si to LIBs is quite challenging because Si is associated with significant volume changes which arise during lithium insertion and extraction, which can hasten mechanical fracture of the electrode, cause a loss of electrical conduction paths, and results in continuous electrolyte decomposition at the active surface when exposed by the cracking of Si during cycling, as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

Choi

Lee

et al. 2015

Journal of Electrochemical Science and Technology

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Advanced polymeric binders with unique functions such as improvements in the electronic conduction network, mechanical adhesion, and mechanical durability during cycling have recently gained an increasing amount of attention as a promising means of creating high-performance silicon (Si) anodes in lithium-ion batteries with high energy density levels. In this review, we describe the key challenges of Si anodes, particularly highlighting the recent progress in the area of polymeric binders for Si anodes in cells.

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Section: Crosslinked Polymeric Bindersmentioning

confidence: 99%

Section: Crosslinked Polymeric Bindersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

Choi

Lee

et al. 2015

Journal of Electrochemical Science and Technology

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“…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][25][26][27][28][29][30] * Electrochemical Society Active Member.…”

mentioning

confidence: 99%

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

Yoon

Nguyen

Seo

et al. 2015

J. Electrochem. Soc.

132

126

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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...

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“…Even though it was shown that nano-sized silica is electrochemically active, 40 the results show that the silicon oxide layer at the surface does not provide any benefits to the capacity, but helps in interacting with the binder and other electrode components. 41,42 Our previous results show that ball milling leads to amorphization of crystalline silicon; however, in silicon nanoparticle the amorphization did not improve reversible capacity. The nano-sized silicon might be small enough that amorphization is not required.…”

mentioning

confidence: 92%

Towards Improving the Practical Energy Density of Li-Ion Batteries: Optimization and Evaluation of Silicon:Graphite Composites in Full Cells

Yim

Niketic

Salem

et al. 2016

J. Electrochem. Soc.

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Increasing the energy density of Li-ion batteries is very crucial for the success of electric vehicles, grid-scale energy storage, and nextgeneration consumer electronics. One popular approach is to incrementally increase the capacity of the graphite anode by integrating silicon into composites with capacities between 500 and 1000 mAh/g as a transient and practical alternative to the more-challenging, silicon-only anodes. In this work, we have calculated the percentage of improvement in the capacity of silicon:graphite composites and their impact on energy density of Li-ion full cell. We have used the Design of Experiment method to optimize composites using data from half cells, and it is found that 16% improvements in practical energy density of Li-ion full cells can be achieved using 15 to 25 wt% of silicon. However, full-cell assembly and testing of these composites using LiNi 0.5 Mn 0.5 Co 0.5 O 2 cathode have proven to be challenging and composites with no more than 10 wt% silicon were tested giving 63% capacity retention of 95 mAh/g at only 50 cycles. The work demonstrates that introducing even the smallest amount of silicon into graphite anodes is still a challenge and to overcome that improvements to the different components of the Li-ion battery are required.

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A Highly Cross‐Linked Polymeric Binder for High‐Performance Silicon Negative Electrodes in Lithium Ion Batteries

Cited by 689 publications

References 37 publications

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

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

Towards Improving the Practical Energy Density of Li-Ion Batteries: Optimization and Evaluation of Silicon:Graphite Composites in Full Cells

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