The Electrochemical Behavior of Polyimide Binders in Li and Na Cells

Wilkes, B. N.; Brown, Zachary L.; Krause, L. J.; Triemert, Matthew; Obrovac, M. N.

doi:10.1149/2.0061603jes

Cited by 40 publications

(45 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LiPAA is not an electrochemically active binder and does not contribute to the reversible or irreversible capacity. 19 As expected, the electrode with PR binder has a greater first lithiation and reversible capacity than the coating with LiPAA binder, since the electrochemically active PR binder contributes to the coating's capacity. Similarly, aro-PI binder has a higher first lithiation and reversible capacity than PR, and, as expected, the coating with aro-PI binder has the highest first lithiation and reversible capacity of all three coatings.…”

Section: Resultssupporting

confidence: 57%

“…17,18 Recently, we have shown that aro-PI has a very large first lithiation capacity of 1943 mAh/g, corresponding to a 34 electron reduction process. 19 This reduction capacity is consistent with the charge required to fully decompose the aro-PI to a hydrogen containing carbon. The resulting decomposition products also had similar electrochemical properties as hydrogen containing carbon, with a reversible capacity of 874 mAh/g, leading to added electrode capacity.…”

supporting

confidence: 68%

“…However, in addition to this inverse relationship, there is likely a reduction in capacity as the film becomes thicker and some of the PR becomes inaccessible for reaction with lithium, which we have observed previously for PI binders. 19 At contents above 30 volume percent, the PR becomes inactive. The same behavior was observed for PI binders and occurs when the TiN in the coating no longer makes a percolating path to the electrode surface, thus impeding any electrochemical reactions.…”

Section: Resultsmentioning

confidence: 99%

“…We have suggested that a similar reaction occurs for aro-PI binders. 19 The performance of PR binder was also evaluated in electrodes having a 60/28 weight ratio of 3M V6 Si alloy and graphite. The mechanical properties of such electrodes were excellent and similar to electrodes using LiPAA binder.…”

Section: Resultsmentioning

confidence: 99%

“…Conductive polymers also exhibit this high irreversible capacity. 19 We suspect that they are also undergoing carbonization during their first lithiation. If carbonization of the binder is key to good cycling properties the utility of using expensive polyimide-based or conductive binders is questionable, when other more inexpensive polymers may exist that undergo reduction during lithiation to produce conductive species.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Phenolic Resin as an Inexpensive High Performance Binder for Li-Ion Battery Alloy Negative Electrodes

Hatchard

Bissonnette

Obrovac

2016

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Phenolic resin was evaluated as a binder material for Li-ion battery negative electrodes containing Si-based alloys. Phenolic resin was found to have a large first lithiation capacity of about 1200 mAh/g, which is suspected to result from the full reduction of the phenolic resin to form a hydrogen containing carbon. The decomposition products formed during the first lithiation have a reversible capacity of about 400 mAh/g and have excellent properties as a binder for alloy-based negative electrodes. The excellent performance of the phenolic resin combined with its low cost make it very attractive for use as a binder in alloy containing negative electrodes for Li-ion batteries. Furthermore the use of binders that decompose during lithiation represents a new concept in the design of high performance binder materials. As the drive to increase the capacity and energy density of Li-ion batteries continues, much work is focused on finding better electrode materials. Much attention has been given to Si and Si-based alloys because of the obvious benefits of the high theoretical capacity of Si. However, this high capacity comes with a price: the large volume changes during charge/discharge cycling that lead to electrode failure.1 To deal with this problem, many researchers are developing advanced binders. Such binders do not limit the volume expansion experienced during lithiation, but maintain structural integrity and electrical connection to the alloy particles during cycling.2-4 It has been shown that good binders for alloy materials provide good adhesion to the active materials and to the current collector, and also provide complete coverage of the alloy particle surfaces.2 It is suspected that by completely covering the surface of the alloy particles, binders can form an "artificial SEI" layer to reduce electrolyte decomposition reactions.2 Examples of binders that exemplify these properties and result in good cycling performance in alloy negative electrodes include poly(carboxylic acid)s and their alkali metal salts, including carboxymethyl cellulose (CMC), 5-10 poly(acrylic acid) (PAA) 4,[11][12][13] and alginate. 14 Other studies have shown that conductive polymers can also be used as excellent binders for alloy negative electrodes. 15,16 Aromatic polyimides (aro-PI) have been shown to be an excellent binder for alloy negative electrodes. 17,18 Recently, we have shown that aro-PI has a very large first lithiation capacity of 1943 mAh/g, corresponding to a 34 electron reduction process.19 This reduction capacity is consistent with the charge required to fully decompose the aro-PI to a hydrogen containing carbon. The resulting decomposition products also had similar electrochemical properties as hydrogen containing carbon, with a reversible capacity of 874 mAh/g, leading to added electrode capacity. Alloy negative electrodes using aro-PI binder had excellent cycling performance. It was suspected that if a hydrogen containing carbon was formed during the first lithiation, it could provide a conductive framework, ena...

show abstract

Section: Resultssupporting

confidence: 57%

supporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Phenolic Resin as an Inexpensive High Performance Binder for Li-Ion Battery Alloy Negative Electrodes

Hatchard

Bissonnette

Obrovac

2016

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

Poly(siloxane imide) Binder for Silicon‐Based Lithium‐Ion Battery Anodes via Rigidness/Softness Coupling

Meng

Cheng

et al. 2020

Chemistry An Asian Journal

View full text Add to dashboard Cite

Binders play a crucial role in maintaining mechanical integrity of electrodes in lithium‐ion batteries. However, the conventional binders lack proper elasticity, and they are not suitable for high‐performance silicon anodes featuring huge volume change during cycling. Herein, a poly(siloxane imide) copolymer (PSI) has been designed, synthesized, and utilized as a binder for silicon‐based anodes. A rigidness/softness coupling mechanism is demonstrated by the PSI binder, which can accommodate volume expansion of the silicon anode upon lithiation. The electrochemical performance in terms of cyclic stability and rate capability can be effectively improved with the PSI binder as demonstrated by a silicon nanoparticle anode.

show abstract

A flexible network polyimides binder for Si/graphite composite electrode inlithium‐ionbatteries

Feng

Yang

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Although the high‐capacity Si/graphite anode serves to advance the energy density of lithium‐ion batteries, the volume change remains the main disfigurement of Si/graphite anode. Many studies show that crosslinked structure binders tend to play a good inhibitory effect on volume expansion. In this work, a three‐dimensionally covalently cross‐linked and flexible polyimides (C–PI–OH) is successfully synthesized and applied as silicon/graphite anode, which is composed through a tri‐monomer co‐polycondensation and crosslinking process. The as‐formed free carboxylic acid groups and amide groups in C–PI–OH are efficient in structural stability, so the electrode bound by C–PI–OH exhibits the highest peeling strength than C–PI and polyvinylidene fluoride. The flexible network of the C–PI–OH binder is competent for accommodating the volume expansion and contraction of silicon particles during the deintercalation of lithium ion, which helps in the wholeness of solid electrolyte interface film and electrodes, and effectively boosting the cycle stability of the Si/graphite anode.

show abstract

The Electrochemical Behavior of Polyimide Binders in Li and Na Cells

Cited by 40 publications

References 20 publications

Phenolic Resin as an Inexpensive High Performance Binder for Li-Ion Battery Alloy Negative Electrodes

Phenolic Resin as an Inexpensive High Performance Binder for Li-Ion Battery Alloy Negative Electrodes

Poly(siloxane imide) Binder for Silicon‐Based Lithium‐Ion Battery Anodes via Rigidness/Softness Coupling

A flexible network polyimides binder for Si/graphite composite electrode inlithium‐ionbatteries

Contact Info

Product

Resources

About