CMC-citric acid Cu(II) cross-linked binder approach to improve the electrochemical performance of Si-based electrodes

Mazouzi, Driss; Grissa, Rabeb; Paris, Michaël; Karkar, Zouina; Huet, Lucas; Guyomard, Dominique; Roué, Lionel; Devic, Thomas; Lestriez, Bernard

doi:10.1016/j.electacta.2019.03.026

Cited by 26 publications

(63 citation statements)

References 45 publications

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“…From literature review, the presence of Cu 2+ could induce coordination bonds within the polymer network enhancing cycling stability. [18] For pH7, the Cu presence is limited and only observed at the CC proximity. Moreover, no delamination from the CC is observed for pH7, indicating a good electrode/CC adhesion.…”

Section: Component Distribution In the Electrodementioning

confidence: 99%

“…pH1 and pH3, one other pic appears at higher binding energy which could be attributed to the ester bond COO-Si. [22] Si 2p spectra exhibits 4 contributions, 2 components between 99 and 101 eV attributed to Si (0) (2p3/2 and 2p1/2) and two components at higher binding energy (102-106 eV) attributed to silicon oxide (2p3/2 and 2p1/2 of SiOx with x<2). For highest pH, an increase in the intensity as well as a shift toward higher binding energy are observed for the peak attributed to silicon oxide, indicating higher surface oxidation while increasing the formulation pH.…”

Section: 1mentioning

confidence: 99%

“…The crosssection views for pH1 and pH3 show a copper contribution across the electrode thickness, confirming the already observed Cu dissolution from the current collector (CC) in acidic conditions and its migration through the electrode. [18] In neutral condition (pH5), the copper presence is much lower and likely only due to contamination coming from cutting. From literature review, the presence of Cu 2+ could induce coordination bonds within the polymer network enhancing cycling stability.…”

Section: Component Distribution In the Electrodementioning

confidence: 99%

“…[16] Finally, the pH=3 formulation showed an impact on the reorganization of the polymer at the contacts points between silicon particles and CC limiting electrode delamination, and promoting the formation of a thinner and less resistive SEI. [17,18] To sum-up, the acidic condition (pH=3) induces the ester bond formation between silanols (silicon particles surface groups) and carboxylic acid groups from the CMC binder enhancing Si dispersion within the electrode but also adhesion to the CC whereas a neutral pH limits CMC-CMC interaction increasing the Si-CMC weak interactions.…”

Section: Introductionmentioning

confidence: 99%

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Silicon-based electrodes formulation in buffered solution for enhanced electrode-electrolyte interfaces

Roland

Delarre

Ledeuil

et al. 2021

Journal of Power Sources

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Silicon nanoparticles based composite electrodes for Li-ion batteries reach high specific capacities and enhance cyclability compared with larger silicon particles. Such electrodes are foreseen for the next generation Li-ion batteries (LiB). Playing on binder and conductive additives in the formulation of the Si based electrodes is a well-known strategy to to enhance performance. Aqueous electrode formulations using the carboxymethyl cellulose as environmentally friendly binder has already showed great cyclability enhancements, especially when employed in acidic conditions. In this study, pH = 1, 3 and 7 buffered solutions were studied as solvent to prepare the Si/C/CMC composite electrodes.The influence of the formulation pH on the electrode components interactions were followed through a combined ATR-FTIR / XPS experiment and discussed in relation with the electrode electrochemical performance. Interestingly, the pH=7 buffered solution show increased capacity retention and coulombic efficiency during 100 cycles compared with the electrode obtained in acidic conditions. Post mortem analysis and EIS study highlighted differences of electrode/current collector (CC) adhesion and SEI deposition.

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Section: Component Distribution In the Electrodementioning

confidence: 99%

Section: 1mentioning

confidence: 99%

Section: Component Distribution In the Electrodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Silicon-based electrodes formulation in buffered solution for enhanced electrode-electrolyte interfaces

Roland

Delarre

Ledeuil

et al. 2021

Journal of Power Sources

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“…For example, thiosemicarbazide modified CMC [29] was used to adsorb Cu 2 + , alginate-CMC gel beads [30] were used to adsorb Pb 2 + , CMC/sodium styrene sulfonate gels [31] were used to remove Cr 3 + and Pb 2 + , and CMC/polyacrylamide composite hydrogel [32] was used to treat and reuse Cu 2 + , Pb 2 + and Cd 2 + . At the same time, it has been reported that CMC can strongly interact with heavy metal ions, since lots of hydrophilic groups (À COOH and À OH) in its polymer backbone can form coordination bonds with metal ions quite easily [33]. Besides, CMC exhibits good conductivity as a polyelectrolyte and shows excellent filmforming ability as natural cellulose.…”

Section: Introductionmentioning

confidence: 99%

Highly Hydrophilic Polymer Composite Modified Electrode for Trace Copper Detection Based on Synergetic Electrostatic Attractions and Chelating Interactions

Wang

Liu

et al. 2020

Electroanalysis

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A new electrochemical sensor for Cu 2 + detection by square wave voltammetry with high sensitivity has been constructed, based on a composite of sodium carboxymethyl cellulose and Nafion. Starting from these two polymers that are rich of hydrophilic groups in backbones, a highly negative-charged composite has been easily prepared, which displays outstanding ability to adsorb and enrich Cu 2 + onto the electrode surface through both electrostatic attractions and chelating interactions. After optimizing test conditions, this new sensor exhibits a good linear signal response to Cu 2 + in a concentration range from 1.0 nΜ to 50.0 nM with a limit of detection of 0.6 nM (S/N = 3), as well as good antiinterference for commonly co-existing metal ions. Besides, this new electrochemical copper sensor has been successfully applied to detect trace Cu 2 + in natural water samples with satisfactory recoveries of 98-104 %. These findings provide a new simple but effective way for the determination of heavy metal ions in environmental pollutants.

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From the Direct Observation of a PAA‐Based Binder Using STEM‐VEELS to the Ageing Mechanism of Silicon/Graphite Anode with High Areal Capacity Cycled in an FEC‐Rich and EC‐Free Electrolyte

Xiong

Dupré

Moreau

et al. 2022

Advanced Energy Materials

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significantly overtake graphite, thanks to its higher specific capacity (3579 mAh g −1 vs 372 mAh g −1 for graphite). Other assets of this material are its low delithiation potential (0.4 V vs Li + /Li), abundance and low cost. However, its use in commercial batteries still remains in practice very limited due to its strong cyclical variation in volume, which can reach 280% in a completely lithiated state (Li 3.75 Si). This results in an irreversible change in the morphology of the Si particles (fragmentation, nanoporosification) as well as severe mechanical damage to the electrode film (cracking, delamination of the current collector). In addition, the expansion/contraction cycles of silicon lead to a degradation of the solid electrolyte interphase (SEI), which must reform with each cycle. [2] Many partial solutions have been proposed to increase the cyclability of negative silicon-based electrodes, such as the nanostructuring of silicon, the combination with carbon or other elements, in the form of composite or alloy, the mixture with graphite, designing the electrodes architecture, the use of electrolytic additives. [3][4][5][6][7][8][9][10][11][12][13] Numerous studies have underlined the key role of the binder on the cyclability of silicon-based electrodes. This one is essential for maintaining the cohesion of the electrode film and its adhesion to the current collector during cycling. The binder also acts more or less effectively as an artificial passivation layer. [14][15][16] The literature is abundant on this subject but it remains difficult to take advantage of it because few studies have been devoted to electrodes of loading and/or density high enough to be rationalizable for the application. A strong limitation in all studies relating to the binder is the difficulty of visualizing it. This one is in the form of nanometric deposits, on the surface or at the point of contact between the particles, which requires very high resolution techniques and/or sensitive to the presence of light elements. [17][18][19][20] Finally, the precipitation of the degradation products of the electrolyte masks the binder in all post-mortem studies. Although it is a key constituent of the formulation of silicon-based electrodes, the binder remains in most cases invisible to observation and its effects must be deduced from the more global measurements made on the electrode.

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CMC-citric acid Cu(II) cross-linked binder approach to improve the electrochemical performance of Si-based electrodes

Cited by 26 publications

References 45 publications

Silicon-based electrodes formulation in buffered solution for enhanced electrode-electrolyte interfaces

Silicon-based electrodes formulation in buffered solution for enhanced electrode-electrolyte interfaces

Highly Hydrophilic Polymer Composite Modified Electrode for Trace Copper Detection Based on Synergetic Electrostatic Attractions and Chelating Interactions

From the Direct Observation of a PAA‐Based Binder Using STEM‐VEELS to the Ageing Mechanism of Silicon/Graphite Anode with High Areal Capacity Cycled in an FEC‐Rich and EC‐Free Electrolyte

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