Overcoming the High-Voltage Limitations of Li-Ion Batteries Using a Titanium Nitride Current Collector

Wang, Shutao; Kravchyk, Kostiantyn V.; Filippin, A. Nicolas; Widmer, Roland; Tiwari, Ayodhya N.; Buecheler, Stephan; Bodnarchuk, Maryna I.; Kovalenko, Maksym V.

doi:10.1021/acsaem.8b01771

Cited by 19 publications

(13 citation statements)

References 32 publications

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“…The standard thickness of the commercial polyolefin separators such as the Celgard separator have a standard thickness estimated in the range of 20–30 µm. It is known that thick separators have high internal resistance, which decreases the cell performance [ 23 , 24 , 26 ]. Therefore, a minimal separator thickness is crucial for high-energy and high-power LIBs.…”

Section: Resultsmentioning

confidence: 99%

“…The studies have been focused on a major current issue—producing higher power/energy densities while maintaining the safe operation of LIBs [ 20 , 21 ]. The separator has intimate influences on battery operation, battery performance, and is finally the most prominent in the safety and dependability of LIBs [ 22 , 23 , 24 ]. The separator prevents physical contact between the positive and negative electrodes while serving as the electrolyte reservoir to facilitate ionic transport during the charging and discharging cycles of the battery.…”

Section: Introductionmentioning

confidence: 99%

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Multilayered PVDF-HFP Porous Separator via Phase Separation and Selective Solvent Etching for High Voltage Lithium-Ion Batteries

Bui

Nguyen

et al. 2021

Membranes

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The development of highly porous and thin separator is a great challenge for lithium-ion batteries (LIBs). However, the inevitable safety issues always caused by poor mechanical integrity and internal short circuits of the thin separator must be addressed before this type of separator can be applied to lithium-ion batteries. Here, we developed a novel multilayer poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) membrane with a highly porous and lamellar structure, through a combination of evaporation-induced phase separation and selective solvent etching methods. The developed membrane is capable of a greater amount of electrolyte uptake and excellent electrolyte retention resulting from its superior electrolyte wettability and highly porous structure, thereby offering better electrochemical performance compared to that of a commercial polyolefin separator (Celgard). Moreover, benefiting from the layered configuration, the tensile strength of the membrane can reach 13.5 MPa, which is close to the mechanical strength of the Celgard type along the transversal direction. The elaborate design of the multilayered structure allows the fabrication of a new class of thin separators with significant improvements in the mechanical and electrochemical performance. Given safer operation, the developed multilayer membrane may become a preferable separator required for high-power and high-energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multilayered PVDF-HFP Porous Separator via Phase Separation and Selective Solvent Etching for High Voltage Lithium-Ion Batteries

Bui

Nguyen

et al. 2021

Membranes

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“…To overcome the drawbacks related to the ACC, different strategies could be applied. Those include the use of protective coatings or the exchange of the current collector to other materials such as TiN, which shows a much higher oxidative stability . Kravchyk et al.…”

Section: Resultsmentioning

confidence: 99%

Enabling High Performance Potassium‐Based Dual‐Graphite Battery Cells by Highly Concentrated Electrolytes

Münster

Heckmann

Nölle

et al. 2019

Batteries & Supercaps

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This work studies an advanced potassium dual-graphite battery (DGB) cell system based on a highly concentrated electrolyte (HCE), i. e., potassium bis(fluorosulfonylimide) (KFSI) in ethyl methyl carbonate (EMC). Structural and electrochemical properties of the designated KFSI/EMC electrolyte are investigated and discussed at different concentrations (1.0 M-4.0 M). Ionic aggregation at high salt concentrations leads to enhanced electrochemical stability and pushes the oxidative stability limit beyond 5 V vs. K j K + . Based on those results, the electrochemical performance with graphite as positive and negative electrode active material in graphite j j K metal cells is presented. For potassium intercalation into graphite, an impressive capacity retention and rate capability is found for the EC-free HCEs (EC = ethylene carbonate), outperforming potassium electrolytes used in the literature. New insights into the formation of the solid electrolyte interphase (SEI) are presented and confirm improved electrochemical performance. Additionally, high salt concentrations in the electrolyte stabilize the aluminium (Al) current collector and enable reversible intercalation of FSI anions into the graphite positive electrode. Furthermore, reversible cycling in DGB cells is shown and a capacity fading mechanism based on parasitic side reactions causing K + ion accumulation in the negative electrode, followed by K metal plating, is comprehensively evaluated.

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“…However, there is a great challenge about interfacial instability between the electrolyte and electrode in these batteries. For most solid-state Li batteries, it is required to properly engineer the interfaces between electrode and electrolyte to yield good cycling performance [73,74] Owing to a moderate Young's modulus as well as low bond energy, sulfide solid electrolytes have good processability and high ionic conductivity. Room-temperature pressure sintering can be used for the fabrication of sulfide solid electrolytes.…”

Section: Batteries With Solid Electrolytementioning

confidence: 99%

The rechargeable aluminum-ion battery with different composite cathodes: A review

Fard

Peighambardoust

Jang

et al. 2020

jcc

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Overcoming the High-Voltage Limitations of Li-Ion Batteries Using a Titanium Nitride Current Collector

Cited by 19 publications

References 32 publications

Multilayered PVDF-HFP Porous Separator via Phase Separation and Selective Solvent Etching for High Voltage Lithium-Ion Batteries

Multilayered PVDF-HFP Porous Separator via Phase Separation and Selective Solvent Etching for High Voltage Lithium-Ion Batteries

Enabling High Performance Potassium‐Based Dual‐Graphite Battery Cells by Highly Concentrated Electrolytes

The rechargeable aluminum-ion battery with different composite cathodes: A review

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