A highly crosslinked polymeric binder for silicon anode in lithium-ion batteries

Hu, Xianchao; Liang, Kang; Li, Jianbin; Ren, Yurong

doi:10.1016/j.mtcomm.2021.102530

Cited by 13 publications

(12 citation statements)

References 27 publications

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“…To measure the swelling ratio (S%) of SA, PAA, and SA−SB, binders were soaked in an electrolyte for 1, 2, 5, 24, and 48 h. S % was computed as eq 1 27…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…To measure the swelling ratio ( S %) of SA, PAA, and SA–SB, binders were soaked in an electrolyte for 1, 2, 5, 24, and 48 h. S % was computed as eq In eq , w initial is the initial weight of the dry electrode plates and w after is the weight of electrode plates after soaking for a certain time.…”

Section: Resultsmentioning

confidence: 99%

“…The swelling ratio of an electrode in an electrolyte has a great influence on electrochemical performance, which largely relies on the properties of binders. The low swelling ratio would lead to inferior wettability, decrease the diffusion rate of Li + , and further enhance the internal resistance. ,, As shown in Figure a, after immersion in the electrolyte for 48 h, the cross-linked SA–SB (27.58%) has a higher electrolyte absorption ratio than that of PAA (23.15%) and SA (22.91%). Contact angle testing also indicates the similar wettability of binders in the electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to the previously mentioned strategies, developing a new type of binder is also an effective way of mitigating the volume effect. As an important component in the conventional lithium-ion battery, the binder could keep the active material and the conducting material in close contact with the current collector as well as maintain the structural integrity of the electrode. − …”

Section: Introductionmentioning

confidence: 99%

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Cross-Linked Sodium Alginate–Sodium Borate Hybrid Binders for High-Capacity Silicon Anodes in Lithium-Ion Batteries

Zhao

et al. 2021

Langmuir

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Silicon is considered one of the most promising next-generation anode materials for lithium-ion batteries. It has the advantages of high theoretical specific capacity (4200 mAh·g–1), which is 10 times larger than that of a commercial graphite anode (372 mAh·g–1). However, there are some problems such as the pulverization of the electrode and an unstable solid electrolyte interphase (SEI) layer aroused by the huge bulk effect (>300%) of Si during the repeated lithiation/delithiation process. A binder plays a vital role in the conventional lithium-ion batteries that can effectively relieve the bulk expansion stress of a silicon anode. In this work, the inorganic cross-linker sodium borate (SB) and the commonly used binder sodium alginate (SA) were condensed through an esterification reaction and the reaction product was marked as SA–SB. It is found that the mechanical robustness and the peel strength of SA–SB are improved after cross-linking, which is conducive to maintaining the structural stability of the silicon anode in long cycle life. In consequence, the capacity retention of the silicon anode using the SA–SB binder (64.1%) is higher than that of SA (50.6%) after 100 cycles at 0.2 A·g–1.

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“…To measure the swelling ratio (S%) of SA, PAA, and SA−SB, binders were soaked in an electrolyte for 1, 2, 5, 24, and 48 h. S % was computed as eq 1 27…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cross-Linked Sodium Alginate–Sodium Borate Hybrid Binders for High-Capacity Silicon Anodes in Lithium-Ion Batteries

Zhao

et al. 2021

Langmuir

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“…To meet the ever increasing demands of portable electronics requirement for higher energy and power densities, high-performance materials development is imperative for lithium-ion batteries (LIBs). Silicon anode materials show the brightest future owing to their super high theoretical capacity (4200 mAh g –1 for Li 22 Si 5 ), − relatively low discharge potential (∼0.4 V versus Li + /Li), − and rich abundance in the earth. − Nevertheless, the commercial application of silicon anode materials is still hindered with the challenges related to the huge volume expansion. − The solid electrolyte interface (SEI) and electrode structure are damaged due to tremendous volume change of silicon anode materials during Li + lithiation and delithiation processes, which seriously deteriorate the lifespan of the lithium-ion battery. − Various strategies have been adopted to ameliorate these issues, such as controlling the morphology of silicon anode materials, − using late-model electrode structures, − and employing high-performance binders. − …”

Section: Introductionmentioning

confidence: 99%

Carboxyl Function Group Introduced to Polyimide Binders for Silicon Anode Materials

Zhang

et al. 2023

Energy Fuels

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Silicon has been considered as one of the most promising candidate anode material for Li-ion batteries due to its high theoretical specific capacity. Nevertheless, its low cycling performance due to the huge volume change during cycling hinders the commercial application of silicon anodes. Binders play a crucial role in Li-ion batteries and can effectively relieve the volumetric expansion stress of silicon anodes. Herein, we developed a polyimide binder with an introduced carboxyl group (PI-COOH). The introduced −COOH group can effectively bond with the oxide layer on the silicon surface through forming improved interface stability and then reducing the damage of the solid electrolyte interface film during cycling. Combined with the excellent intrinsic mechanical and thermodynamic properties of polyimide, the as-prepared PI-COOH binder significantly improved the cycling stability and rate performance of silicon anode.

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A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries

Hwang,

Kim,

Lim

et al. 2023

Advanced Science

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Silicon has garnered significant attention as a promising anode material for high‐energy density Li‐ion batteries. However, Si can be easily pulverized during cycling, which results in the loss of electrical contact and ultimately shortens battery lifetime. Therefore, the Si anode binder is developed to dissipate the enormous mechanical stress of the Si anode with enhanced mechanical properties. However, the interfacial stability between the Si anode binder and Cu current collector should also be improved. Here, a multifunctional thiourea polymer network (TUPN) is proposed as the Si anode binder. The TUPN binder provides the structural integrity of the Si anode with excellent tensile strength and resilience due to the epoxy‐amine and silanol‐epoxy covalent cross‐linking, while exhibiting high extensibility from the random coil chains with the hydrogen bonds of thiourea, oligoether, and isocyanurate moieties. Furthermore, the robust TUPN binder enhances the interfacial stability between the Si anode and current collector by forming a physical interaction. Finally, the facilitated Li‐ion transport and improved electrolyte wettability are realized due to the polar oligoether, thiourea, and isocyanurate moieties, respectively. The concept of this work is to highlight providing directions for the design of polymer binders for next‐generation batteries.

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A highly crosslinked polymeric binder for silicon anode in lithium-ion batteries

Cited by 13 publications

References 27 publications

Cross-Linked Sodium Alginate–Sodium Borate Hybrid Binders for High-Capacity Silicon Anodes in Lithium-Ion Batteries

Cross-Linked Sodium Alginate–Sodium Borate Hybrid Binders for High-Capacity Silicon Anodes in Lithium-Ion Batteries

Carboxyl Function Group Introduced to Polyimide Binders for Silicon Anode Materials

A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries

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