A rational design of separator with substantially enhanced thermal features for lithium-ion batteries by the polydopamine–ceramic composite modification of polyolefin membranes

Dai, Jiangdong; Shi, Chuan; Li, Chao; Shen, Xiu; Peng, Longqing; Wu, Dezhi; Sun, Di; Zhang, Peng; Zhao, Jinbao

doi:10.1039/c6ee01219a

Cited by 259 publications

(164 citation statements)

References 47 publications

(63 reference statements)

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“…The OCV of LFP/Li cell with Celgard 2325 drops suddenly to 0 V after 450 s at 150 °C, owing to the severe thermal shrinkage of separator and results in short circuit inside the cell. The cell with PE‐BN/PVDF‐HFP separator did not exhibit the sharp drop in voltage during the entire heating process due to high thermal stability with robust microstructure and bilayer formation, however, the slow voltage drop is observed due to the self‐discharge at elevated temperatures . The photographic images of Celgard 2325 and PE‐BN/PVDF‐HFP separators after OCV measurements are given in Figure b.…”

Section: Resultsmentioning

confidence: 99%

“…During the past decades, intensive efforts have been made to improve the thermal stability, wettability, and electrolyte retention of existing bilayer or trilayer polyolefin separators. Among those efforts, surface coating, surface grafting, and blending with various inorganic materials including silica (SiO 2 ), alumina (Al 2 O 3 ), and titania (TiO 2 ) , and polymers were mostly focused. Surface coating method has drawn great attention among these approaches on account of the facile process to enhance the performance of polyolefin separators.…”

Section: Introductionmentioning

confidence: 99%

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High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

Waqas

Ali

et al. 2018

Adv Materials Inter

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Highly efficient and thermally stable polyethylene‐hexagonal boron nitride/poly(vinylidene fluoride‐hexafluoropropylene) (PE‐BN/PVDF‐HFP) bilayer separator with microporous structure is prepared, for the first time with a wet chemistry method. The incorporation of hexagonal boron nitride particles in PE matrix promotes the interfacial interaction between PE and PVDF‐HFP layers to prevent separation of layers and supresses dendrite growth owing to the strong adsorption energy with polymers, large interactive surface area, and superior mechanical capability. The PVDF‐HFP layer provides additional thermally stable backbone while its inherent hydrophilic property and highly porous structure improve the overall performance of the separator. The bilayer separator owns a high electrolyte uptake of 348% and a thermal shrinkage of 6.6% upon annealing at 140 °C for 1 h. The lithium iron phosphate/lithium cell with the as‐prepared separator owns a high ionic conductivity up to 4.4 × 10−4 S cm−1, and a room‐temperature capacity of 120 mAh g−1 at 2 C with a 95% capacity retention after 500 cycles and a capability of 108 mAh g−1 at 4 C. The PE‐BN/PVDF‐HFP separator is a promising alternative of traditional multilayer separators for high‐performance lithium‐ion batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

Waqas

Ali

et al. 2018

Adv Materials Inter

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“…All the samples are sintered from 25 to 800 °C at a rate of 10 °C min −1 (Figure 2d). The hydrophobic surface and intrinsically poor compatibility of Celgard 2325 impair the electrolyte uptake, leading to a 48° ± 1.89° static contact angle (Figure 2g), [44] which is much above those of PVDF-HFP (16° ± 1.12°) ( Figure 2h) and PVDF-HFP/CuO (8° ± 1.14°) (Figure 2f). The increased degradation temperature of PVDF-HFP/CuO is attributed to the formation of CuF bond and the enhanced interface interaction between strong electronwithdrawing groups of CF (PVDF-HFP) and O (CuO) (see density functional theory, DFT and X-ray photoelectron spectroscopy, XPS analysis).…”

Section: Physical Property Analysis Of Polymer/active Oxide Separatormentioning

confidence: 99%

An Upgraded Lithium Ion Battery Based on a Polymeric Separator Incorporated with Anode Active Materials

Chen

Zhou

Feng

et al. 2019

Advanced Energy Materials

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Structural/compositional characteristics at the anode/electrolyte interface are of paramount importance for the practical performance of lithium ion batteries, including cyclic stability, rate capacity, and operational safety. The anode‐electrolyte interface with traditional separator technology is featured with inevitable phase discontinuity and fails to support the stable operation of lithium ion batteries based on large‐capacity anodes with structural change in charges/discharges, such as transition metal oxide anodes. In this work, an anode/electrolyte framework based on an oxide anode and an active‐oxide‐incorporated separator is proposed for the first time and investigated for lithium ion batteries. The architecture builds a robust anode‐separator interface in LIBs, shortens Li+ diffusion path, accelerates electron transport, and mitigates the volume change of the oxide anode in electrochemical reactions. Remarkably, 4 wt% CuO addition in the separator leads to a 17% enhancement in the overall capacity of a battery with a CuO anode. The battery delivers an unparalleled record reversible capacity of 637.2 mAh g−1 with a 99% capacity retention after 100 charge/discharge cycles at 0.5 C. The high performance are attributed to the robust anode‐separator interface, which gives rise to enhanced interaction between the oxide anode and the same‐oxide‐incorporated composite in the separator.

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“…There are several ways to overcome these limitations of polyolefin membrane separators; for instance, their surface modification by chemical grafting, E‐beam treatment, or plasma treatments . Another modification method of the polyolefin separators is to coat them with inorganic and/or organic particles . Various types inorganic materials including different zeolites [melt flow index (MFI) and NaA] have been coated on different polymeric membranes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of 4A zeolite coated polypropylene membrane for lithium‐ion batteries separator

Shekarian

Nasr

Mohammadi

et al. 2019

J of Applied Polymer Sci

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This study aims to improve wettability and thermal resistance of lithium‐ion batteries separators. For this purpose, a commercial polypropylene (PP) separator was coated by 4A zeolite using poly(vinylidene fluoride) as binder and effects of the separators' zeolite content was investigated. All the coated separators showed lower contact angles, higher electrolyte uptakes, and less thermal shrinkages compared to the neat commercial separator. The coated PPA8 separator (zeolite to binder ratio of 8) showed the lowest wettability (contact angle of 0°) and electrolyte uptake (270%) due to its surface porosity resulting from the zeolite particles interstitial cavities as well as their internal cavities. Also, the PPA8 separator ion conductivity was found as 2.25 mS cm−1 and C‐rate and cycling performance of its assembled battery were higher compared to those of the commercial PP separator assembled battery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47841.

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A rational design of separator with substantially enhanced thermal features for lithium-ion batteries by the polydopamine–ceramic composite modification of polyolefin membranes

Abstract: We report a rational design of separator for lithium-ion batteries by the polydopamine–ceramic composite-modification of polyolefin membranes, which leads to substantially enhanced thermal and mechanical stability.

Cited by 259 publications

References 47 publications

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

High‐Performance PE‐BN/PVDF‐HFP Bilayer Separator for Lithium‐Ion Batteries

An Upgraded Lithium Ion Battery Based on a Polymeric Separator Incorporated with Anode Active Materials

Preparation of 4A zeolite coated polypropylene membrane for lithium‐ion batteries separator

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