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

Hwang, Jae Hyuk; Kim, Eunji; Lim, Eun Young; Lee, Woohwa; Kim, Ji‐Oh; Choi, Inhye; Kim, Yong Seok; Kim, Dong‐Gyun; Lee, Jin Hong; Lee, Jong‐Chan

doi:10.1002/advs.202302144

Cited by 11 publications

(1 citation statement)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that the slope of the line corresponds to the Warburg factor (eq 1, Experimental Section). 42 Based on the Warburg factor, we determined the Li + diffusion coefficient of the Si/POWPU and Si/PVDF anodes (eq 2, Experimental Section). 43 We confirmed that the Li + diffusion coefficient of the Si/POWPU anode (1.64 × 10 −12 ) was higher than that of the Si/PVDF (8.28 × 10 −13 ).…”

Section: Electrochemical Performance Of the Si/powpu Anodementioning

confidence: 99%

Stress-Dissipative Elastic Waterborne Polyurethane Binders for Silicon Anodes with High Structural Integrity in Lithium-Ion Batteries

Kim,

Lim

et al. 2024

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Silicon (Si) has been recognized as a promising anode material for lithium-ion batteries (LIBs) owing to its high theoretical capacity and cost efficiency. However, conventional poly(vinylidene fluoride) (PVDF) binders have been revealed to be inadequate in withstanding the significant volume changes that occur during repeated lithiation/delithiation processes, leading to the degraded cycling performance of LIBs. To address this problem, polymer binders containing polar functional groups and elastic properties have been developed. However, the use of toxic organic solvents to prepare polymeric binders poses a challenge. In this study, we prepare an eco-friendly polyurethane binder using water as the dispersion solvent by incorporating nonionic hydrophilic poly(ethylene glycol monomethyl ether)-based trimethylolpropane (MPEG-TMP) chains into the polyurethane structure (designated as POWPU). The POWPU binder is designed to remain insoluble in the electrolyte and retain its mechanical stretchability and elasticity at the Si anode. In the Si/binder system, the polar urethane groups form hydrogen bonds with the silanol groups on the Si particles, while the stretchable and elastic poly(propylene oxide) (PPO) chains are able to dissipate stress caused by volume changes. Besides, the high electrolyte absorption of POWPU and the coordination between the PEO segments of the MPEG-TMP chains and Li + facilitated Li + transports, which in turn enhances the ionic conductivity of the POWPU binder. As a result of these advantages, the rate capability and cycling performance are enhanced compared with those of the conventional PVDF binder. These results suggest that the sustainable and environmentally benign POWPU binder could be an attractive choice for fabricating eco-friendly and stable Si anodes.

show abstract

Section: Electrochemical Performance Of the Si/powpu Anodementioning

confidence: 99%

Stress-Dissipative Elastic Waterborne Polyurethane Binders for Silicon Anodes with High Structural Integrity in Lithium-Ion Batteries

Kim,

Lim

et al. 2024

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

Functionalized Binders Boost High‐Capacity Anode Materials

Dong,

Wang,

Huang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

The burgeoning field of energy storage battery innovation has sparked a relentless pursuit of high‐capacity anode materials to meet the escalating demand for improved energy density. Typically, these materials for batteries experience significant volume changes during cycles, which severely test the structural integrity and lifespan of electrode configurations. High‐performance binders have emerged as a critical component in addressing this challenge. Although they represent a small proportion of the battery's composition, binders play a pivotal role in enhancing electrochemical efficiency, safety, and cost‐effectiveness of batteries. The advancement of high‐capacity anode materials has rendered traditional binders inadequate, prompting the development of functional binders that are increasingly being refined to meet these requirements. This article began by outlining the role and requirements of binders within electrodes, examining cutting‐edge characterization methodologies, and discussing the “structure‐function” paradigm that underpins binder selection. It then showcased the research advancements in identifying suitable binders for high‐capacity anode materials, including silicon (Si), phosphorus (P), tin (Sn), antimony (Sb), and germanium (Ge). In summary, the article contemplated the future direction of binder development and application in high‐capacity electrode materials. The aim is to facilitate the progression of high‐performance, high‐capacity anodes, thereby accelerating the development of high‐energy‐density lithium‐ion and sodium‐ion batteries.

show abstract

Electrode Binder Design on Silicon‐Based Anode for Next‐Generation Lithium‐Ion Batteries

Li,

Wang,

Zhang

et al. 2024

Batteries & Supercaps

View full text Add to dashboard Cite

As an important part of the electrode material of lithium‐ion batteries, the binder significantly affects the forming strength of the solid electrolyte interface (SEI), and also determines the mechanical properties and cycling stability. In the silicon anode, binder have greater effect in the chemical and electrochemical stability because of the volume of the silicon anode changes by more than 300 %. Thus, the development of functional new binders with enhanced properties is one of the keys to mitigating the instability of silicon anodes. This concept first briefly introduces the advantages and disadvantages of conventional electrode binders, then the current research progress of silicon anode binders is briefly summarized based on the different types of interaction forces of binders. Finally, we conclude the properties indicators of silicon anode binders with superior performance in batteries, and comment our previous work in detail.

show abstract

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

Cited by 11 publications

References 73 publications

Stress-Dissipative Elastic Waterborne Polyurethane Binders for Silicon Anodes with High Structural Integrity in Lithium-Ion Batteries

Stress-Dissipative Elastic Waterborne Polyurethane Binders for Silicon Anodes with High Structural Integrity in Lithium-Ion Batteries

Functionalized Binders Boost High‐Capacity Anode Materials

Electrode Binder Design on Silicon‐Based Anode for Next‐Generation Lithium‐Ion Batteries

Contact Info

Product

Resources

About