The Influence of Polyvinylidene Fluoride (PVDF) Binder Properties on LiNi0.33Co0.33Mn0.33O2 (NMC) Electrodes Made by a Dry-Powder-Coating Process

Wang, Ming; Hu, Jiazhi; Wang, Yikai; Cheng, Yang‐Tse

doi:10.1149/2.1171910jes

Cited by 46 publications

(42 citation statements)

References 37 publications

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“…On top of these issues, too low/high of a thickness has a great influence on the following calendaring process. 4) Drying and solidification process: [143] fast drying or drying at high temperatures promotes binder migration and inhomogeneous distribution. Therefore, it is ideal to dry the slurry at a low temperature at the first stage, and then gradually increase the temperature during the constant-rate stage, and further bake during the falling-rate stage.…”

Section: Other Challengesmentioning

confidence: 99%

Recent Advances in Silicon‐Based Electrodes: From Fundamental Research toward Practical Applications

et al. 2021

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Section: Other Challengesmentioning

confidence: 99%

Recent Advances in Silicon‐Based Electrodes: From Fundamental Research toward Practical Applications

et al. 2021

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“…Another alternative method to wet processing has been developed by the company Maxwell Technologies [63] and has subsequently been used by several research groups. This process is based on Electrostatic Spray Deposition (ESD) [64][65][66][67][68][69]. During the process, the particles, i.e., the active material, the conductive carbon and the binder (which is in powder form) are mixed together and are vaporized onto a metallic current collector due to the application of a high voltage.…”

Section: Spray Depositionmentioning

confidence: 99%

Challenges in Solvent-Free Methods for Manufacturing Electrodes and Electrolytes for Lithium-Based Batteries

et al. 2021

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With the ever-growing energy storage notably due to the electric vehicle market expansion and stationary applications, one of the challenges of lithium batteries lies in the cost and environmental impacts of their manufacture. The main process employed is the solvent-casting method, based on a slurry casted onto a current collector. The disadvantages of this technique include the use of toxic and costly solvents as well as significant quantity of energy required for solvent evaporation and recycling. A solvent-free manufacturing method would represent significant progress in the development of cost-effective and environmentally friendly lithium-ion and lithium metal batteries. This review provides an overview of solvent-free processes used to make solid polymer electrolytes and composite electrodes. Two methods can be described: heat-based (hot-pressing, melt processing, dissolution into melted polymer, the incorporation of melted polymer into particles) and spray-based (electrospray deposition or high-pressure deposition). Heat-based processes are used for solid electrolyte and electrode manufacturing, while spray-based processes are only used for electrode processing. Amongst these techniques, hot-pressing and melt processing were revealed to be the most used alternatives for both polymer-based electrolytes and electrodes. These two techniques are versatile and can be used in the processing of fillers with a wide range of morphologies and loadings.

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“…A high porosity will give good permeability, but often induces a trade-off related to binding strength; however, this was not the case when dry coating the high MW PVDF binder. In fact, the capacity retention increased from 17 to 50% for cathodes with high MW, without decreasing the binding strength [68].…”

Section: Solvent-free Manufacturingmentioning

confidence: 94%

“…The MW should also be considered in solvent-free electrode manufacturing. Wang et al [68] analysed PVDF binders of different MWs and thermal activation in NMC111 cathodes by dry coating with ESD. The PVDF with a high MW gave the microstructure with the highest porosities (30%) and decreased the electrode's interfacial resistance.…”

Section: Solvent-free Manufacturingmentioning

confidence: 99%

Opportunities for the State-of-the-Art Production of LIB Electrodes—A Review

Bryntesen¹,

Strømman²,

Tolstorebrov³

et al. 2021

Energies

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A sustainable shift from internal combustion engine (ICE) vehicles to electric vehicles (EVs) is essential to achieve a considerable reduction in emissions. The production of Li-ion batteries (LIBs) used in EVs is an energy-intensive and costly process. It can also lead to significant embedded emissions depending on the source of energy used. In fact, about 39% of the energy consumption in LIB production is associated with drying processes, where the electrode drying step accounts for about a half. Despite the enormous energy consumption and costs originating from drying processes, they are seldomly researched in the battery industry. Establishing knowledge within the LIB industry regarding state-of-the-art drying techniques and solvent evaporation mechanisms is vital for optimising process conditions, detecting alternative solvent systems, and discovering novel techniques. This review aims to give a summary of the state-of-the-art LIB processing techniques. An in-depth understanding of the influential factors for each manufacturing step of LIBs is then established, emphasising the electrode structure and electrochemical performance. Special attention is dedicated to the convection drying step in conventional water and N-Methyl-2-pyrrolidone (NMP)-based electrode manufacturing. Solvent omission in dry electrode processing substantially lowers the energy demand and allows for a thick, mechanically stable electrode coating. Small changes in the electrode manufacturing route may have an immense impact on the final battery performance. Electrodes used for research and development often have a different production route and techniques compared to those processed in industry. The scalability issues related to the comparison across scales are discussed and further emphasised when the industry moves towards the next-generation techniques. Finally, the critical aspects of the innovations and industrial modifications that aim to overcome the main challenges are presented.

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The Influence of Polyvinylidene Fluoride (PVDF) Binder Properties on LiNi_0.33Co_0.33Mn_0.33O₂ (NMC) Electrodes Made by a Dry-Powder-Coating Process

Cited by 46 publications

References 37 publications

Recent Advances in Silicon‐Based Electrodes: From Fundamental Research toward Practical Applications

Recent Advances in Silicon‐Based Electrodes: From Fundamental Research toward Practical Applications

Challenges in Solvent-Free Methods for Manufacturing Electrodes and Electrolytes for Lithium-Based Batteries

Opportunities for the State-of-the-Art Production of LIB Electrodes—A Review

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