Effects of binder content on manganese dissolution and electrochemical performances of spinel lithium manganese oxide cathodes for lithium ion batteries

Kim, Eun Young; Lee, Boram; Yun, Giyeong; Oh, Eun‐Suok; Lee, Hochun

doi:10.1016/j.cap.2015.01.029

Cited by 9 publications

(5 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…49. 117 In addition, it has also shown improved cycle performance. The binder film suppresses side reactions and serves as a passivation layer at the LMO/electrolyte interface, thus, enhancing the electronic conductivity of the composite LMO electrode.…”

Section: Prevention Of Mn-dissolutionmentioning

confidence: 99%

Review—Manganese Dissolution from Spinel Cathode: Few Unanswered Questions

Bhandari

Bhattacharya

2016

J. Electrochem. Soc.

113

View full text Add to dashboard Cite

The choice of cathode material critically influences the performance, cost and energy density in a Li ion battery. LiMn 2 O 4 (LMO) cathode is an attractive cathode material because of its high rate capability, low cost, safety and non-toxicity. However, low cycle life or capacity fading with cycling is a big hurdle in the practical application of LMO cathodes. The dominant cause of the capacity fading, Mn dissolution from LMO, is still a challenge to overcome. In this review, we attempt to emphasize the loopholes in the understanding related to the Mn dissolution phenomenon in LMO cathodes in the presence of both aqueous and non-aqueous electrolytes. The underlying mechanism behind the dissolution process is often explained with the help of ionic charge disproportionation argument. Nevertheless, there are experimental and theoretical evidence in the literature to counter the simplistic view of dissolution due to charge disproportionation. Moreover, the correlation between the metal dissolution and the capacity fading is not causally established yet in the literature which hinders the formulation for a systematic strategy to prevent the capacity loss. In the current article we discuss all the relevant investigations related to the understanding of the cause, effect and prevention strategies of Mn-dissolution. We attempt to point out the gaps and contradictions in the literature and motivate further targeted studies in this seminally important material for better Li-ion batteries having higher rate capability and capacity retention.

show abstract

Section: Prevention Of Mn-dissolutionmentioning

confidence: 99%

Review—Manganese Dissolution from Spinel Cathode: Few Unanswered Questions

Bhandari

Bhattacharya

2016

J. Electrochem. Soc.

113

View full text Add to dashboard Cite

show abstract

“…As a portion of the electrode surface containing the active materials is covered with the binder material, it is preferred that the binder absorbs the electrolyte to facilitate faster ion transport. However, excess electrolyte uptake can result in swelling that can severely deteriorate binder adhesion …”

Section: Resultsmentioning

confidence: 99%

“…However, excess electrolyte uptake can result in swelling that can severely deteriorate binder adhesion. 40 Low mass loading electrodes, i.e., electrodes with <5 mg cm −2 of active materials, were prepared and soaked in the electrolyte solution (2 M ZnSO 4 + 0.3 M MnSO 4 ) for an hour to calculate the EU. The EU values of the APOs were compared to that of PVA/PEGDE.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Aminopolyolefins with Tunable Hydrophilicity and Chain Flexibility for Application as Binders in Aqueous Rechargeable Batteries

Kuanr,

Stoševski,

Wilkinson

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Rechargeable Zn-ion batteries (ZIBs) are an attractive alternative to Li-ion batteries (LIBs) for delivering sustainable energy storage systems for stationary applications due to their high energy density, use of earth-abundant materials, lower cost, and improved safety. Although ZIBs have theoretically high energy densities, maintaining the long-term performance of highmass-load ZIBs remains a challenge. While polymeric binders are known to maintain mechanical integrity during cycling and prolong battery life, diverse binder materials have not been widely explored for the development of new ZIB technologies. As binders, recently disclosed aminopolyolefins (APOs) have the potential to offer good charge and mass transport properties to improve the electrochemical performance of the cell. Here, different types of APO-based binders with variable mechanical properties and hydrophilicities have been synthesized. The chain flexibility and hydrophilicity of the APO binders were found to have a profound influence on the ZIB cycling performance. APOs with self-healing and hydrophilic properties were preferred for assembling aqueous ZIBs that are not limited to low active material loading but show that a high active material loading is possible. The tunability of APOs was exploited to assemble near-neutral aqueous Zn/MnO 2 batteries, with up to 25 mg cm −2 of MnO 2 , to deliver modified performance and cyclability of up to ≈100 mAh g −1 MnOd 2 at the 100th cycle. These results show that novel APOs are a promising platform for the development of materials with tunable hydrophilicity and chain flexibility to push toward the enhanced long-term performance of ZIBs.

show abstract

“…[ TBA-TEVS NMP -3D-interconnected structure, -high thermal stability Si [83] Although neat PVDF is widely used to develop LIBs, its properties can be further upgraded by grafting it with maleic anhydride [84], grafting of poly( tert -butylacrylate) (PtBA) for increasing its mechanical properties [73], or addition of rosin biopolymer to decrease its crystallinity [85,86] in order to improve overall electrode properties. Also, PVDF with lithium manganese oxide (LiMn2O4) active material leads to reduced Mn dissolution and consequently improves rate capability [87]. Similarly, PVDF latex [88],…”

Section: Watermentioning

confidence: 99%