One-step fabrication of robust lithium ion battery separators by polymerization-induced phase separation

J., Manly, Alexander; Tenhaeff, Wyatt E.

doi:10.1039/d1ta10730e

Cited by 20 publications

(3 citation statements)

References 75 publications

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“…The phase separation method is generally divided into the thermally induced phase separation method [183][184][185] and non-solvent-induced phase separation method [186,187].…”

Section: Phase Separation Methodsmentioning

confidence: 99%

Eco-Friendly Lithium Separators: A Frontier Exploration of Cellulose-Based Materials

Zhao,

Xiao,

Luo

et al. 2024

IJMS

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Lithium-ion batteries, as an excellent energy storage solution, require continuous innovation in component design to enhance safety and performance. In this review, we delve into the field of eco-friendly lithium-ion battery separators, focusing on the potential of cellulose-based materials as sustainable alternatives to traditional polyolefin separators. Our analysis shows that cellulose materials, with their inherent degradability and renewability, can provide exceptional thermal stability, electrolyte absorption capability, and economic feasibility. We systematically classify and analyze the latest advancements in cellulose-based battery separators, highlighting the critical role of their superior hydrophilicity and mechanical strength in improving ion transport efficiency and reducing internal short circuits. The novelty of this review lies in the comprehensive evaluation of synthesis methods and cost-effectiveness of cellulose-based separators, addressing significant knowledge gaps in the existing literature. We explore production processes and their scalability in detail, and propose innovative modification strategies such as chemical functionalization and nanocomposite integration to significantly enhance separator performance metrics. Our forward-looking discussion predicts the development trajectory of cellulose-based separators, identifying key areas for future research to overcome current challenges and accelerate the commercialization of these green technologies. Looking ahead, cellulose-based separators not only have the potential to meet but also to exceed the benchmarks set by traditional materials, providing compelling solutions for the next generation of lithium-ion batteries.

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“…The phase separation method is generally divided into the thermally induced phase separation method [183][184][185] and non-solvent-induced phase separation method [186,187].…”

Section: Phase Separation Methodsmentioning

confidence: 99%

Eco-Friendly Lithium Separators: A Frontier Exploration of Cellulose-Based Materials

Zhao,

Xiao,

Luo

et al. 2024

IJMS

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“…The N m of an ideal separator is 1, but the value for typical commercial secondary battery separators is approximately between 4.5 and 23. [49,50] In fact, an N m of <8 is acceptable, taking into account the structural design necessities and mechanical strength restrictions of the separator. [51] In a study of LIBs, researchers constructed models to explore the correlation between N m and lithium dendrite growth.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Functionalized Separator Strategies toward Advanced Aqueous Zinc‐Ion Batteries

Zong

Wang

et al. 2023

Advanced Energy Materials

154

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“…For this reason, researchers have explored a large variety of techniques to control the characteristics of separator materials and optimize their performance, including phase separation and electrospinning. 9,10 Here, electrospray deposition (ESD) of PI is evaluated as a potential manufacturing approach for separators in planar Li-Ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Self-Limiting Electrospray Deposition (SLED) of Porous Polyimide Coatings as Effective Lithium-Ion Battery Separator Membranes

Green-Warren,

Fassler,

Juhl

et al. 2024

Preprint

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Electrospray deposition (ESD) is employed to produce separator membranes for coin-cell lithium-ion batteries (LIBs) using off-the-shelf polyimide (PI). The PI coatings are deposited directly onto planar NMC electrodes via self-limiting electrospray deposition (SLED). Scanning electron microscopy (SEM), optical microscopy, and spectroscopic microreflectometry are implemented in combination to evaluate the porosity, thickness, and morphology of sprayed PI films. Electrochemical performance of the PI separators are analyzed via charge/discharge cycle rate tests. Discharge capacities of cells with the unoptimized SLED PI separators are within 83-99.8% of those with commercial Celgard 2325 PP/PE/PP separators. Furthermore, ultraviolet-visual wavelength spectroscopy (UV-vis) is utilized to qualitatively assess variation in film porosity within a prescribed temperature range of 20-400oC. UV-vis results underscore the ability of the SLED PI separator to maintain its porous microstructure up to ~350oC. This study points to the unique possibility of SLED as a separator manufacturing technique for geometrically complex energy storage systems. Further research is needed to optimize the polymer-solvent system to enhance control of porosity, pore size, and coating thickness. This can lead to significant improvement in rate and cycle life performance in more advanced energy storage devices.

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One-step fabrication of robust lithium ion battery separators by polymerization-induced phase separation

Abstract: Conventional lithium ion battery separators are microporous polyolefin membranes that play a passive role in the electrochemical cell. Next generation separators should offer significant performance enhancements, while being fabricated through...

Cited by 20 publications

References 75 publications

Eco-Friendly Lithium Separators: A Frontier Exploration of Cellulose-Based Materials

Eco-Friendly Lithium Separators: A Frontier Exploration of Cellulose-Based Materials

Functionalized Separator Strategies toward Advanced Aqueous Zinc‐Ion Batteries

Self-Limiting Electrospray Deposition (SLED) of Porous Polyimide Coatings as Effective Lithium-Ion Battery Separator Membranes

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