Robust polyetherimide fibrous membrane with crosslinked topographies fabricated via in-situ micro-melting and its application as superior Lithium-ion battery separator with shutdown function

Kong, Lushi; Liu, Bingxue; Ding, Jinglan; Hou, Yudong; Tian, Guofeng; Qi, Shengli; Wu, Dezhen

doi:10.1016/j.memsci.2017.12.015

Cited by 75 publications

(38 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TGA was tested by the TA Q50 system at 10 °C min −1 in air. The electrolyte uptake property of separators was evaluated via submersing the separators in the simulative electrolyte (ethyl carbonate (EC):dimethyl carbonate (DMC):diethyl carbonate (DEC) = 1:1:1, v/v/v) for 2 h. Then, the electrolyte‐soaked separators were weighted immediately after dribbling the redundant electrolyte on the surface of the separators . The electrolyte uptake can be calculated by Equation

Uptake = (W_{1} - W_{2}) / W_{2} \times 100 %

where W 1 is the weight of membranes with plentiful electrolyte and W 2 is the weight of membranes without electrolyte.…”

Section: Methodsmentioning

confidence: 99%

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

et al. 2019

Self Cite

View full text Add to dashboard Cite

Herein, an innovative polyimide (PI) nanofibrous membrane with unique bonding microstructures is fabricated for lithium‐ion battery (LIB) separator application via an elaborately designed dipping method using polyamic acid (PAA) glue as the joint binder. Furthermore, the bonding degree can be easily adjusted by simply varying the concentration of PAA glue. The introduction of bonding microstructures into the PI nanofibrous nonwoven membrane leads to the formation of tough 3D networks between PI nanofibers and turns the loose–weak nonwoven membrane to a compact–robust fabric membrane. The tensile strength of the PI nanofibrous membrane is consequently promoted from 5 to 36 MPa, which greatly improves the feasibility of the membrane for the LIB winding process and the safety of the LIB during long‐term running. The cells using the bonded PI nanofibrous separators exhibit an excellent cycling stability and rate capability, manifesting 80.3% capacity retention at 5 C (i.e., 128.5 mAh g−1) and can run stably at a high temperature of 120 °C. Herein, the prepared PI nanofibrous membranes with such bonding microstructures are demonstrated, which have the potential to be advanced separators for secure and high‐power LIBs.

show abstract

Uptake = (W_{1} - W_{2}) / W_{2} \times 100 %

where W 1 is the weight of membranes with plentiful electrolyte and W 2 is the weight of membranes without electrolyte.…”

Section: Methodsmentioning

confidence: 99%

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The maximum tensile strength was 32 MPa with 99% of elongation (for PVDF nanofiber mat it was 24.1 MPa with 84% elongation). The tensile strength of NCNF webs was better than that of polyetherimide fibers (21 MPa), paper‐supported inorganic composite (5.31 MPa), and thermally crosslinked fluorinated polyimide nanofiber membrane (32.7 MPa) reported previously in . This may be attributed to the addition of HNT and improved orientation of NCNF fibers.…”

Section: Resultsmentioning

confidence: 67%

PVDF/halloysite nanocomposite‐based non‐wovens as gel polymer electrolyte for high safety lithium ion battery

et al. 2018

View full text Add to dashboard Cite

Gel polymer electrolyte (GPE) based on electrospun poly(vinylidene fluoride) (PVDF)/halloysite nanotube (HNT) nanocomposite non-wovens was synthesized and its suitability as a separator in lithium-ion battery (LIB) was explored. In this study, HNT played a key role in reducing the average diameter of the electrospun fibers and uplifted the porosity of the non-wovens thereby improving their electrolyte uptake. Due to a reduction in crystallinity and increased % porosity of the PVDF/HNT non-wovens, the ionic conductivity (1.77 mScm −1 ) and ionic transport across the separator were improved. Moreover, this GPE separator exhibited high tensile and puncture strength with negligible thermal shrinkage and a higher melting temperature compared with a commercially available separator, which is vital from the safety perspective. The cycling performance of Li/GPE/LiCoO 2 cell was evaluated and it exhibited a high capacity of 138.01 mAhg −1 with 97% coulombic efficiency for the initial cycle. The cell was stable and retained its high performance with little loss in capacity even after repeated charge-discharge cycles. Such a combination of high ionic conductivity, tensile strength with low thermal shrinkage is seen to be very rare in polymer-based separators. It is noteworthy that this novel GPE outperformed the commercial separator also in the cycle performance. POLYM. COMPOS., 40:2320-2334, 2019

show abstract

“…Thermal shutdown materials, a class of temperature responsive materials, are frequently applied in LIBs. [ 154–156 ] Analogously, these strategies can be transferred into the design of safe SIBs, including thermal response membranes, electrolytes, and polymer monomer additives, etc. (Figure 6b,c) Thermal shutdown is general realized by the resistance change from the polymerization of small molecules, or the melting of diaphragm [ 157–158 ] during the temperature increase process to terminate the operation of battery.…”

Section: Strategies and Concepts For High‐safety Materials Designmentioning

confidence: 99%

Materials Design for High‐Safety Sodium‐Ion Battery

Yang

Xin

Mai

et al. 2020

Advanced Energy Materials

353

211

View full text Add to dashboard Cite

Sodium‐ion batteries, with their evident superiority in resource abundance and cost, are emerging as promising next‐generation energy storage systems for large‐scale applications, such as smart grids and low‐speed electric vehicles. Accidents related to fires and explosions for batteries are a reminder that safety is prerequisite for energy storage systems, especially when aiming for grid‐scale use. In a typical electrochemical secondary battery, the electrical power is stored and released via processes that generate thermal energy, leading to temperature increments in the battery system, which is the main cause for battery thermal abuse. The investigation of the energy generated during the chemical/electrochemical reactions is of paramount importance for battery safety, unfortunately, it has not received the attention it deserves. In this review, the fundamentals of the heat generation, accumulation, and transportation in a battery system are summarized and recent key research on materials design to improve sodium‐ion battery safety is highlighted. Several effective materials design concepts are also discussed. This review is designed to arouse the attention of researcher and scholars and inspire further improvements in battery safety.

show abstract

Robust polyetherimide fibrous membrane with crosslinked topographies fabricated via in-situ micro-melting and its application as superior Lithium-ion battery separator with shutdown function

Cited by 75 publications

References 26 publications

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

PVDF/halloysite nanocomposite‐based non‐wovens as gel polymer electrolyte for high safety lithium ion battery

Materials Design for High‐Safety Sodium‐Ion Battery

Contact Info

Product

Resources

About