In situ crosslinkable acrylic random copolymer binders for silicon anodes in lithium‐ion batteries

Lee, Hyocheol; Preman, Anjali N.; Vo, Thuan Ngoc; Lee, Jin‐Hyeong; Kim, Il Tae; Ahn, Suk‐kyun

doi:10.1002/er.8027

Cited by 12 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the increase in cycles, the impedance of the PAA/Si electrode gradually increases, mainly because the PAA is subject to the change of the Si volume. The linear chain slippage leads to the separation of the conductive agent and Si particles, thus hindering the transmission of electrons, resulting in the increase in the overall impedance of the electrode . In contrast, the impedance of the CA- g -PAA/Si electrode increases is relatively small.…”

Section: Resultsmentioning

confidence: 99%

Multidimensional Branched Composite Binder via Covalent Grafting for High-Performance Silicon-Based Anodes

Shen

Wang

Mei³

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

A binder plays an essential role in preserving the mechanical stability of electrodes and in enhancing the cycle life of Si anodes. Nevertheless, the typical binders normally are not effective enough to relieve the unavoidable volume expansion of Si during cycling. Herein, to make full use of the polar functional groups on the polymer backbone, the citric acid-grafted poly(acrylic acid) (CA-g-PAA) composite binder is rationally designed and prepared by a simple graft modification. The CA molecule not only provides more reactive groups but also connects with PAA to form a multidimensional branched structure. Due to the interaction of CA and PAA, the proposed binder (CA-g-PAA) demonstrates enhanced adhesion strength. Thus, the CA-g-PAA/Si electrode retains a high discharge specific capacity of 2482.3 mAh g–1 after 300 cycles at 840 mA g–1 and exhibits a better structural integrity. This study highlights the synergistic interaction of CA and PAA with Si particles and offers a simple path for the design of optimized binders.

show abstract

Section: Resultsmentioning

confidence: 99%

Multidimensional Branched Composite Binder via Covalent Grafting for High-Performance Silicon-Based Anodes

Shen

Wang

Mei³

et al. 2023

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…The copolymers with >43 mol % UR content, in particular, may undergo considerable elongation (>200%), whereas those with UR content of <32 mol % are relatively stiff. According to previous studies, neither an excessively brittle nor a deformable binder is desirable in accommodating the stress generated during the volume change of Si. ,,− Thus, copolymers with moderate UR content, such as AA(89)UR(11), AA(79)UR(21), and AA(68)UR(32), are better candidates for use as high-performance binders in Si anodes in terms of mechanical properties.…”

Section: Resultsmentioning

confidence: 99%

Self-Healable Poly(Acrylic Acid) Binder toward Optimized Electrochemical Performance for Silicon Anodes: Importance of Balanced Properties

Preman,

Vo,

Choi

et al. 2023

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Si is a promising anode for high-energy lithium-ion batteries, but its severe capacity decay due to volume changes remains a challenge. To address this, we synthesized a series of acrylic copolymer binders with randomly distributed carboxylic acid (CA) and n-butyl carbamate (BC) groups. CA groups ensure good adhesion to the Si surface, while BC groups provide self-healing as well as a wide range of thermal and mechanical properties. By fine-tuning the content of these functional groups, we optimize the mechanical, adhesion, and self-healing properties, and electrolyte uptake of the binders to maximize their electrochemical performance. The Si electrode with a binder containing 68 mol % CA groups and 32 mol % BC groups achieves a high initial discharge capacity of 3628 mA h g −1 , with an initial Coulombic efficiency (ICE) of 84%. This electrode also displays a discharge capacity of 2334 mA h g −1 after 100 cycles at 0.5 A g −1 , surpassing the performance of a Si-poly(acrylic acid) electrode (3171 mA h g −1 at the first cycle, ICE of 86%, and 1367 mA h g −1 at the 100th cycle at 0.5 A g −1 ). Through a systematic investigation of the structure−property−electrochemical performance relationship, we prioritize the desired properties of the binder to enable the development of high-performance Si anodes.

show abstract

“…However, their rate performance and capacity remain constrained because graphite can store Li-ions only through an intercalation mechanism [5][6][7][8][9][10]. Conversely, anode materials that rely on alloying mechanisms, such as Si and Sn, are also proposed owing to their high capacities and rapid rate characteristics [11][12][13][14][15][16][17][18]. However, structural degradation of these active components, caused by substantial volume changes during Li insertion and extraction, results in a subpar cycling performance [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis and Electrochemical Analysis of Zn-Doped V2O5 Anode Materials for High-Rate Li Storage

Jang,

Seo,

Kim

2024

International Journal of Energy Research

View full text Add to dashboard Cite

The surging demand for Li rechargeable batteries with high energy densities and rapid rate capability has propelled research on materials that can replace the conventional anode materials like graphite. Vanadium pentoxides (V2O5) have emerged as promising anode candidates owing to their excellent rate capability. Specifically, V2O5 allows the electrochemical prelithiation process, in which three Li-ions can be inserted to form Li3V2O5, followed by reversible insertion and extraction of two Li-ions. Nevertheless, the unsatisfactory Li-ion diffusion coefficients and electrical conductivities of these materials remain major drawbacks. Here, we propose a Zn-doped V2O5 anode, fabricated using a two-step sol–gel method, for high-rate Li-ion batteries. Zn was incorporated into V2O5 to enhance the Li-ion transport kinetics through the electrode. The crystal structure (orthorhombic) of Zn-doped V2O5 was identified by X-ray diffraction analysis, and the Zn doping was confirmed by X-ray photoelectron microscopy. The effect of Zn doping was thoroughly examined using various analytical methods, such as cyclic voltammetry and galvanostatic intermittent titration technique. The Zn-doped V2O5 electrode exhibited remarkable cycling durability, enduring for 1000 cycles, while retaining an enhanced capacity, even under a high rate of 2C.

show abstract

In situ crosslinkable acrylic random copolymer binders for silicon anodes in lithium‐ion batteries

Cited by 12 publications

References 50 publications

Multidimensional Branched Composite Binder via Covalent Grafting for High-Performance Silicon-Based Anodes

Multidimensional Branched Composite Binder via Covalent Grafting for High-Performance Silicon-Based Anodes

Self-Healable Poly(Acrylic Acid) Binder toward Optimized Electrochemical Performance for Silicon Anodes: Importance of Balanced Properties

Facile Synthesis and Electrochemical Analysis of Zn-Doped V2O5 Anode Materials for High-Rate Li Storage

Contact Info

Product

Resources

About