Ultrathin ZrO2-coated separators based on surface sol-gel process for advanced lithium ion batteries

Liu, Lei; Wang, Yong; Gao, Chenye; Yang, Cheng; Wang, Ke; Li, Haibin; Gu, Hal-Bon

doi:10.1016/j.memsci.2019.117368

Cited by 64 publications

(18 citation statements)

References 33 publications

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“…The addition of ceramic nanoparticles such as SiO 2 , 28,29 TiO 2 , 30 Al 2 O 3 , 31 and ZrO 2 (ref. 32 ) can further improve the performance of GPEs. The inorganic filler in the polymer matrix can increase the proportion of the amorphous region of the polymer chain, reduce the crystallinity of the polymer membrane, as well as increase the Li + conductivity.…”

Section: Introductionmentioning

confidence: 99%

Flexible poly(vinylidene fluoride-co-hexafluoropropylene)-based gel polymer electrolyte for high-performance lithium-ion batteries

Zhang

Huang

et al. 2021

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Flexible poly(vinylidene fluoride-co-hexafluoropropylene)-based gel polymer electrolyte for high-performance lithium-ion batteries

Zhang

Huang

et al. 2021

RSC Adv.

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“…They are composed of a slanted line and a half-circle. The intercept of the Z′ real axis represents the bulk impedance ( R b ) for electromigration of ions in the solution, and the semicircle in the high-frequency region represents the interface impedance ( R ct ) for electrochemical polarization, while the slanted line during the low-frequency region reflects the Warburg impedance ( R w ) for concentration polarization . For the charging and discharging process of the battery with a lithium anode, the R ct obtained from the half-circle of Nyquist plots is very important, which is dependent on the interface between the electrolyte and anode.…”

Section: Resultsmentioning

confidence: 99%

Role of Separator Surface Polarity in Boosting the Lithium-Ion Transport Property for a Lithium-Based Battery

Lei

Xie

Sun

et al. 2021

ACS Appl. Energy Mater.

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The separator is a significant safety component inside the lithium-based battery. To design a higher-power-density system, a functional separator has attracted more attention. In our study, vinyl trimethoxysilane (VTMS) has been directly grafted onto a polyethylene (PE) separator by γ-irradiation. We have evaluated the performance of a PE separator grafted with VTMS (PE-g-SiH) and its basic hydrolysis separator (PE-g-SiO) in detail and have discussed the role of separator surface polarity in the ion transport process. The consequence shows that the lithium-ion transference number of the PE-g-SiO separator is 0.38, superior than 0.27 of a pure PE separator and 0.29 of a PE-g-SiH separator. It can be a reason that the LiCoO 2 /Li cell with a PE-g-SiO separator shows excellent cycle stability and rate performance. Furthermore, in the case of a PE-g-SiO separator, the Li/Li symmetric model possesses the lowest activation energy of 55.2 kJ mol −1 , indicating that lithium ions migrate easily at the interface of electrodes and a separator filled with liquid electrolyte. It is attributed to the improved interaction between the separator wall and solvent, which is in favor of lithium-ion-selective transport. Hence, separator functionalization is expected to enhance the battery performance further.

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“…The separator surface is prior to provide an alkaline environment with polar groups (e.g., ‐OH, ‐COO ‐ ) for the complexation of metal alkoxide molecules, which can be obtained by plasma treatment, PDA treatment, or surface alkaline etching. [ 77‐79 ] To this end, Zhang et al. [ 80 ] fabricated a SiO 2 ‐grafted PAN separator by in situ growth.…”

Section: Traditional Separators With High Thermal Stability and Mechanical Strengthmentioning

confidence: 99%

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

Liu

Jiang

et al. 2020

Energy & Environ Materials

137

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With the rapid development of lithium‐ion batteries (LIBs), safety problems are the great obstacles that restrict large‐scale applications of LIBs, especially for the high‐energy‐density electric vehicle industry. Developing component materials (e.g., cathode, anode, electrolyte, and separator) with high thermal stability and intrinsic safety is the ultimate solution to improve the safety of LIBs. Separators are crucial components that do not directly participate in electrochemical reactions during charging/discharging processes, but play a vital role in determining the electrochemical performance and safety of LIBs. In this review, the recent advances on traditional separators modified with ceramic materials and multifunctional separators ranging from the prevention of the thermal runaway to the flame retardant are summarized. The component–structure–performance relationship of separators and their effect on the comprehensive performance of LIBs are discussed in detail. Furthermore, the research challenges and future directions toward the advancement in separators for high‐safety LIBs are also proposed.

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Ultrathin ZrO2-coated separators based on surface sol-gel process for advanced lithium ion batteries

Cited by 64 publications

References 33 publications

Flexible poly(vinylidene fluoride-co-hexafluoropropylene)-based gel polymer electrolyte for high-performance lithium-ion batteries

Flexible poly(vinylidene fluoride-co-hexafluoropropylene)-based gel polymer electrolyte for high-performance lithium-ion batteries

Role of Separator Surface Polarity in Boosting the Lithium-Ion Transport Property for a Lithium-Based Battery

Safer Lithium‐Ion Batteries from the Separator Aspect: Development and Future Perspectives

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