Ultrasonically sprayed poly(vinylidene chloride) coating on polyurea as moisture barrier

Li, Zhongru; Deng, Hongyang; Xiao, Peishuang; Lin, Xiaoyan; Liang, Shuen; Tian, Chunrong; Wang, Jianhua

doi:10.1016/j.matchemphys.2022.126803

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…The adhesion of ZnO@C film on the surface of cellulose was measured by the tape test. [30] After taping, ordinary cellulose had the surface fibers taken away by the tape paper after the test, while ZnO@C/cellulose had only a very small amount of shedding at the junction, demonstrating the coating's incredibly strong surface adhesion (Figure S11, Supporting Information). As shown in Figure S12 (Supporting Information), the PP and cellulose separators reacted with severe combustion as soon as they came into contact with the heat source and completely lost their original shape and size.…”

Section: Resultsmentioning

confidence: 99%

ZnO@C Coated Cellulose‐Based Separators Control Lithium Deposition Direction to Stable Lithium Metal Batteries

Chen,

Fan,

Zhou

et al. 2023

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Li metal anodes have attracted attention due to their high specific capacity and low electrochemical potential. Nevertheless, the uncontrolled growth of Li dendrites hinders the practical application of Li metal batteries. Although the various approaches have made performance improvements, safety hazards still exist since Li dendrites are still growing along the anode to the separator during the continuous plating/stripping process. Herein, a straightforward method is proposed to achieve stable Li metal batteries with directional growth control by using a functional ZnO@C/cellulose membrane as a separator. The abundant pore structure and functional groups of biomass cellulose enhance the Li‐ion transport and interface compatibility. The ZnO transforms in situ to form a Li–Zn alloy layer which is uniformly coated to the separator to direct uniform ion concentration polarization and charge distribution polarization, control the growth direction of Li, significantly improve the cycling stability, and promote the reversibility of the Li plating/exfoliation process. As a result, the symmetric cell exhibits an extreme lifetime of more than 4500 h and low polarization at 3 mA cm−2. The cycling performance of the Li||LiFePO4 full cell reaches a capacity retention of 98% after 270 cycles at a mass loading of 10 mg cm−2.

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Section: Resultsmentioning

confidence: 99%

ZnO@C Coated Cellulose‐Based Separators Control Lithium Deposition Direction to Stable Lithium Metal Batteries

Chen,

Fan,

Zhou

et al. 2023

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“…Among the polymer thin films that can be deposited by VDP, we selected polyurea. Polyurea has a low water vapor permeability, making it an excellent gas barrier film, 23,24) suitable for use as a protective film in MEMS devices. Moreover, the hydrogen bonding between the polyurea molecular chains contributes to its excellent mechanical durability.…”

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confidence: 99%

Monomer diffusion tendencies in complex-shaped materials by vapor deposition polymerization

Tabata,

Oosumi,

Matsubara

et al. 2024

Jpn. J. Appl. Phys.

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Conformal coatings are crucial for various applications. In this study, we investigate polyurea coatings on complex-shape polytetrafluoroethylene (PTFE) membranes using vapor deposition polymerization. The diffusion mechanism involves monomer adsorption and desorption on PTFE fibers, enhanced by an increased substrate temperature, facilitating monomer diffusion. A system pressure of 100 Pa promoted monomer collisions, forming oligomers with lower desorption rates, aiding polymer thin-film formation. The combination of high substrate temperature for diffusion and gas-phase oligomer formation resulted in uniform polyurea coatings across the PTFE membrane. A non-exhaustion method provided an extensive monomer diffusion, achieving a thorough polyurea deposition throughout the membrane structure.

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Development and progress in polymer materials for anti-corrosion and anti-fouling applications: A review

Lyu,

Wang,

Zhang

et al. 2024

J. Cent. South Univ.

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Ultrasonically sprayed poly(vinylidene chloride) coating on polyurea as moisture barrier

Cited by 5 publications

References 31 publications

ZnO@C Coated Cellulose‐Based Separators Control Lithium Deposition Direction to Stable Lithium Metal Batteries

ZnO@C Coated Cellulose‐Based Separators Control Lithium Deposition Direction to Stable Lithium Metal Batteries

Monomer diffusion tendencies in complex-shaped materials by vapor deposition polymerization

Development and progress in polymer materials for anti-corrosion and anti-fouling applications: A review

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