Enhancement on the wettability of lithium battery separator toward nonaqueous electrolytes

Xie, Yong; Zou, Hailin; Xiang, Hongfa; Xia, Ru; Liang, Dongdong; Shi, Pengcheng; Dai, Sheng; Wang, Haihui

doi:10.1016/j.memsci.2015.12.025

Cited by 101 publications

(64 citation statements)

References 26 publications

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“…The working principle of a separator is to essentially provide a path to transfer lithium ions between an anode and cathode during charging/discharging without causing short circuits [11,15,16] . Commercial separators comprise polyolefins (polypropy-lene (PP) or polyethylene (PE)), which are widely used because of their outstanding electrochemical and mechanical properties originating from their convenient morphologies, and low costs [17][18][19][20] . However, the thermal stabilities of polyolefins are not sufficiently high to endure extreme temperatures, because their melting points are low (PE: 130 °C, PP: 160 °C) [16,[21][22][23][24] .…”

Section: Introductionmentioning

confidence: 99%

Polymer-free electrospun separator film comprising silica nanofibers and alumina nanoparticles for Li-ion full cell

Zaidi

Wang

Shao

et al. 2020

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Polymer-free electrospun separator film comprising silica nanofibers and alumina nanoparticles for Li-ion full cell

Zaidi

Wang

Shao

et al. 2020

Journal of Energy Chemistry

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“…One aspect in process optimization is to change the surface and wetting properties of the separator. While classical materials are polyolefins (e.g., polyethylene [PE], polypropylene [PP], and/or combinations), new separators are hybrid materials with organic polyolefins and inorganic components (e.g., silica or alumina). Due to the high number of oxidic functional groups at the surface of these particles, a hybrid separator is more hydrophilic than a comparable polyolefinic material.…”

Section: Introductionmentioning

confidence: 99%

Influence of Separator Material on Infiltration Rate and Wetting Behavior of Lithium‐Ion Batteries

et al. 2019

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The reduction of process time and costs of lithium‐ion‐battery (LIB) cells to make electromobility an ecological technology and economically accessible for everyone is a very crucial research topic. Within the production process of actual LIB cells, the electrolyte filling and wetting are very time‐consuming, and by association, cost‐intensive steps. Therefore, it is essential to investigate and understand the impact of several process parameters on the wetting time and product quality. This can be achieved by the visualization of the wetting progress and subsequent electrochemical characterization of the LIB cells. The monitoring is realized by wetting balance tests for electrodes and separators as well as a new and powerful thermographic method. In addition, different separators with different surface chemistries are tested to improve the production process, the actual cell design, and therefore the costs of the final battery cell.

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“…8,[11][12][13] Recently, several strategies have been proposed to improve the electrolyte wettability of polyolefin separators including physical coating and chemical modification. [14][15][16] For example, Lee et al coated polypropylene (PP) separators with polyvinylidene fluoride (PVDF) copolymer nanofiber using electrospinning technology, which largely improved the electrolyte wettability and the corresponding electrochemical performance of LIBs. 14 However, the physical coating layers are normally unstable in the electrolyte, which could easily delaminate from the separator.…”

Section: Introductionmentioning

confidence: 99%

A sandwich‐structured separator based on in situ coated polyaniline on polypropylene membrane for improving the electrolyte wettability in lithium‐ion batteries

Hao

Zhang

et al. 2019

Int J Energy Res

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Summary Designing separators with excellent electrolyte wettability is of great significance to improve the electrochemical behavior of lithium‐ion batteries (LIBs). Herein, we develop a sandwich‐structured separator by facile in situ polymerization of polyaniline (PANI) on the both sides of polypropylene (PP) separator. The introduction of PANI coating improves the electrolyte wettability of the PP separators. Consequently, the cells equipped with this sandwich‐structured separator demonstrate superior electrochemical performance including initial capacity, rate performance, and cyclic stability compared with the PP separator. This work may provide a facile approach for separator modification to improve the performance of LIBs.

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Enhancement on the wettability of lithium battery separator toward nonaqueous electrolytes

Cited by 101 publications

References 26 publications

Polymer-free electrospun separator film comprising silica nanofibers and alumina nanoparticles for Li-ion full cell

Polymer-free electrospun separator film comprising silica nanofibers and alumina nanoparticles for Li-ion full cell

Influence of Separator Material on Infiltration Rate and Wetting Behavior of Lithium‐Ion Batteries

A sandwich‐structured separator based on in situ coated polyaniline on polypropylene membrane for improving the electrolyte wettability in lithium‐ion batteries

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