Evaluating the trade-off between mechanical and electrochemical performance of separators for lithium-ion batteries: Methodology and application

Plaimer, Martin; Breitfuß, Christoph; Sinz, Wolfgang; Heindl, Simon Franz; Ellersdorfer, Christian; Steffan, Hermann; Wilkening, Martin; Hennige, Volker; Tatschl, Reinhard; Geier, A.; Schramm, Christian; Freunberger, Stefan

doi:10.1016/j.jpowsour.2015.12.047

Cited by 37 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This similar to that of Celgard membranes measured in the machine direction, but more than 1100% higher than those measured in the transverse direction of Celgard membranes. It is 800% higher than the Celgard membranes measured at 45° to the machine direction …”

Section: Resultsmentioning

confidence: 58%

“…Two sources of micrometer‐sized particles are identified: one kind is the loosened catalytic particles falling from the electrodes during spiral winding process and another the lithium dendrites formed after prolonged period of charge–discharge cycles. The size of these particles limits the minimum separator thickness for safety requirement …”

Section: Resultsmentioning

confidence: 99%

“…The localized puncture failure mode in the P‐class separator is a result of higher tensile toughness of UHMWPE. Therefore, the newly prepared thin and robust self‐reinforced composite UHMWPE separators with high cycle and cell performances offer solutions to the pareto fronts in current separators . Additionally, the increasing puncture resistance with displacement suggests that the P‐class membrane separators might potentially mitigate lithium dendrite growths during cell charge/discharge cycles.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Nanoporous UHMWPE Membrane Separators for Safer and High‐Power‐Density Rechargeable Batteries

Gao

2017

Global Challenges

View full text Add to dashboard Cite

Battery safety has been of critical concerns and there are renewed interest in developing safer membranes for enhancing the inherent safety of lithium ion batteries. In this paper, the synthesis of a robust and safer self‐reinforced composite ultrahigh molecular weight polyethylene (UHMWPE) membrane is described. The self‐reinforced composite membrane consists of ≈200 nm nanopores homogeneously embedded inside interpenetrating nanofibrillar “shish kebab” networks. It performs thermal fuse function by selectively melting its kebab crystals while the elongated shish fibrillary backbones remain intact. Simulated thermal fuse function tests show that the newly prepared separator displays a 300% increase in tensile strength (550 MPa), 300% increase in puncture resistance (1.5 N μm −1 ), as well as an 18 000 times increase in impedance when lateral dimensions are kept constant. Cells prepared using the UHMWPE separators also exhibit a 10% higher energy density and better cyclability than those using commercial separators. Hence, the newly prepared ultrathin and dimensionally stable membrane will enhance the safety protections for rechargeable batteries with low impedance for high energy and power density.

show abstract

Section: Resultsmentioning

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nanoporous UHMWPE Membrane Separators for Safer and High‐Power‐Density Rechargeable Batteries

Gao

2017

Global Challenges

View full text Add to dashboard Cite

show abstract

“…For example, the Plaimer group compiled a table (Tab. ) that showed a set of characteristic parameters for the separator behavior. These parameters describe in principle the mechanical, electrochemical, and thermal properties of the separator.…”

Section: State‐of‐the‐art Separatorsmentioning

confidence: 99%

Separator Membranes for High Energy‐Density Batteries

et al. 2018

View full text Add to dashboard Cite

Rechargeable lithium-ion, lithium-sulfur, zinc-air, and redox-flow batteries are the most anticipated multipurpose platforms for future generations of electric vehicles, consumer devices, and portable electronics because of their high-energy density and cost-effective electrochemical energy storage. Over the past decades, a variety of novel separator membranes and electrolytes have been developed to improve rechargeable battery performance while not thoroughly addressing the issue of flammability, safety, and low cycling stability of high-energy-density batteries. This comprehensive review mainly underlines the optimization and modification of porous membranes for battery separator applications, covering four significant types: microporous separators, nonwoven mat separators, polymer electrolyte membranes, and composite membrane separators. Furthermore, the present trends in material selection for batteries are reviewed, and different choices of cathode, anode, separator, and electrolyte materials are discussed, which will also serve as key components to boost the development of next-generation rechargeable batteries.

show abstract

“…As an important part of lithium‐ion batteries, separator has a significant influence on the performance of lithium‐ion batteries. The separator electrically insulates two electrodes to avoid short circuits, while ensuring that the lithium ions can pass through the separator pores that are full of liquid electrolyte . Nowadays, commercial polyolefin‐based microporous separators, i.e., Celgard 2400 separator, are the most widely used separators for lithium‐ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical performance and thermal stability of the electrospun PTFE nanofiber separator for lithium‐ion batteries

Zhong

Yao

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Separator is a very important set of lithium-ion batteries. At present, low porosity and poor thermal stability are two major disadvantages of separator. In this work, we first apply electrospinning method to prepare the Polytetrafluoroethylene (PTFE) nanofiber separator, which has the advantages of electrospinning method and PTFE materials. The effect of the PTFE nanofiber separator is investigated by scanning electron microscope, Capillary Flow Porometer, thermogravimetric-differential scanning calorimeter, linear sweep voltammeter, AC impedance, and charge/discharge cycling tests. The results demonstrate that the PTFE nanofiber separator has a special fiber structure made from PTFE particles gathering one by one along the fibers. Moreover, the PTFE nanofiber separator exhibits several advantages, including suitable pore diameter, uniform pore size distribution, high porosity, and electrolyte uptake, which enhance the ionic conductivity. The thermal stability of the PTFE nanofiber separator is much better than that of the conventional polyolefin separator. The Li/LiCoO 2 cell equipped with PTFE nanofiber separator exhibits excellent rate performance and first charge-discharge specific capacity of 142 and 131 mA h g 21 , respectively, accompanied by relatively stable cycle performance at 0.2 C rate. It is supposed to be a candidate for application in lithium-ion batteries. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2018, 135, 46508.

show abstract

Evaluating the trade-off between mechanical and electrochemical performance of separators for lithium-ion batteries: Methodology and application

Cited by 37 publications

References 20 publications

Nanoporous UHMWPE Membrane Separators for Safer and High‐Power‐Density Rechargeable Batteries

Nanoporous UHMWPE Membrane Separators for Safer and High‐Power‐Density Rechargeable Batteries

Separator Membranes for High Energy‐Density Batteries

Electrochemical performance and thermal stability of the electrospun PTFE nanofiber separator for lithium‐ion batteries

Contact Info

Product

Resources

About