The high performances of SiO 2 /Al 2 O 3 -coated electrospun polyimide fibrous separator for lithium-ion battery

Liang, Xingxing; Yang, Ying; Jin, Xin; Huang, Zheng‐Hong; Kang, Feiyu

doi:10.1016/j.memsci.2015.06.016

Cited by 156 publications

(73 citation statements)

References 25 publications

(25 reference statements)

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“…Figure 7a, b shows the charge/discharge curves of the 30th, 60th, 90th, and 120th cycle of the lithium-ion cell assembled with the PE separator and MSPC separator at a charge/ discharge current density of 0.5/0.5 C in the voltage range of 2.5-4.2 V. It is obvious that the discharge capacities of both cells decrease slightly as cycle number increases, which may be due to the little change in internal impedance. It is well known that some physical changes may occur in the active materials and interfaces during cell cycling, which increase cell internal resistance [28]. Moreover, after the 120th cycle, the capacity retention of the MSPC separator is found to be 97 % (Fig.…”

Section: Electrochemical Performance Of the Composite Separatormentioning

confidence: 93%

Hollow mesoporous silica sphere-embedded composite separator for high-performance lithium-ion battery

Xiao

Wang

et al. 2016

J Solid State Electrochem

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A high-performance composite separator based on hollow mesoporous silica spheres, poly(vinylidene fluorideco-hexafluoropropylene) (PVdF-HFP), and poly(ethylene terephthalate) nonwoven was explored as lithium-ion battery separator via a dip coating technique followed by a phase separation wet process. Systematical investigations including morphology characterization, porosity measurement, electrolyte wettability, thermal shrinkage testing, and cell performance examination are carried out. It is demonstrated that the unique mesoporous structures of silica spheres endow the composite separator with well-defined microporous structure. Owing to the preferable microstructure and relatively polar constituents, the composite separator exhibits higher porosity, superior electrolyte wettability, and outstanding thermal stability. Based on the above advantages, the composite separator shows better electrochemical performances, such as the discharge C-rate capability and cycling performance, as compared to the commercialized PE separator. This research presents a simple approach to prepare high-performance separator, which is demonstrated to be a good candidate for lithium-ion batteries.

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Section: Electrochemical Performance Of the Composite Separatormentioning

confidence: 93%

Hollow mesoporous silica sphere-embedded composite separator for high-performance lithium-ion battery

Xiao

Wang

et al. 2016

J Solid State Electrochem

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“…The corresponding results are shown in Figure 5. 32 EIS is tested to obtain a more comprehensive study of the interfacial properties between the separator and the electrode. Moreover, compared with PP, PP@PANI present better electrolyte uptake capacity, indicating better electrochemical performance of the cells with PP@PANI than that of PP.…”

Section: Resultsmentioning

confidence: 99%

“…It implied that the cells with PP@PANI possessed good cycling performance, which is probably attributed to the favorable interface characteristic and strong affinity of PP@PANI and the electrolyte. 32 EIS is tested to obtain a more comprehensive study of the interfacial properties between the separator and the electrode. The various components of the EIS are derived using the equivalent circuit model (Figure 7B insert).…”

Section: Resultsmentioning

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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“…Various inorganic fillers owning high thermal conductivity have been added into the PI matrix by in situ polymerization to improve the overall performance of PI, including carbon black [18,19], alumina (Al 2 O 3 ) [20,21], aluminum nitride (AlN) [22,23], silica (SiO 2 ) [24,25], titanium dioxide (TiO 2 ) [26], silicon carbide (SiC) [27,28], silicon nitride (Si 3 N 4 ) [29,30], boron nitride (BN) [31,32], and zinc oxide (ZnO) [33,34]. Compared with the abovementioned inorganic fillers, carbon nanotubes (CNTs) possess high electrical conductivity (10 5 S•cm -1 ) and thermal conductivity (3500 W/mK) and extremely high Young modulus (0.9 TPa) and tensile strength (150 GPa), as well as excellent optical properties [35].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Multiwalled Carbon Nanotube-Reinforced Polyimide Composite Films with Enhanced Mechanical and Thermal Properties

Chen

Liu

et al. 2019

International Journal of Polymer Science

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Polyimide- (PI-) based nanocomposites containing the 4,4′-diaminodiphenyl ether- (ODA-) modified multiwalled carbon nanotube (MWCNT) filler were successfully prepared. The PI/MWCNTs-ODA composite films exhibit high thermal conductivity and excellent mechanical property. The optimal value of thermal conductivity of the PI/MWCNTs-ODA composite film is 0.4397 W/mK with 3 wt.% filler loading, increased by 221.89% in comparison with that of the pure PI film. In addition, the tensile strength of the PI/MWCNTs-ODA composite film is 141.48 MPa with 3 wt.% filler loading, increased by 20.74% in comparison with that of the pure PI film. This work develops a new strategy to achieve a good balance between the high thermal conductivity and excellent mechanical properties of polyimide composite films by using functionalized carbon nanotubes as an effective thermal conductive filler.

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The high performances of SiO 2 /Al 2 O 3 -coated electrospun polyimide fibrous separator for lithium-ion battery

Cited by 156 publications

References 25 publications

Hollow mesoporous silica sphere-embedded composite separator for high-performance lithium-ion battery

Hollow mesoporous silica sphere-embedded composite separator for high-performance lithium-ion battery

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

Functionalized Multiwalled Carbon Nanotube-Reinforced Polyimide Composite Films with Enhanced Mechanical and Thermal Properties

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