Adhesive Hybrid SiO2.01C0.23Hx Nanoparticulate Coating on Polyethylene (PE) Separator by Roll-to-Roll Atmospheric Pressure Plasma

Abstract

For the ever-increasing demand for highly safe lithium-ion batteries (LIBs), the common sol-gel process provides heat-resistance to separators with an inorganic coating, where the adhesion to the separator is the key to safety and stability. In this paper, we present a SiO2.01C0.23Hx-coated polyethylene (PE) separator through a roll-to-roll atmospheric plasma-enhanced chemical vapor deposition (R2R-APECVD) of hexamethyldisiloxane (HMDSO)/Ar/O2. The adhesion strength of SiO2.01C0.23Hx-coated PE was tested by peel-off test and found to be higher than that of the commercial Al2O3-coated separator (0.28 N/mm vs. 0.06 N/mm). Furthermore, the SiO2.01C0.23Hx-coated PE separator showed better electrochemical performance in C-rate and long term cycle tests. FTIR, SEM, and XPS analysis indicate that the increased adhesion and electrochemical performance are attributed to the inner hybrid SiO2.01C0.23Hx coating with organic and inorganic components.

Poly(vinyl alcohol)/Melamine Composite Containing LATP Nanocrystals as a High-Performing Nanofibrous Membrane Separator for High-Power, High-Voltage Lithium-Ion Batteries

“…2920.35 and 2848.84 cm –1 for commercial PE separator (Figure S1b, curve a′) are attributed to asymmetric and symmetric stretching vibrations of CH 2 , respectively. Also, the two minor peaks found at ∼1472.86 and ∼730.72 cm –1 are ascribed to CH 2 in-plane bending and out-of-plane bending vibrations, respectively . The major peaks observed at ∼3324.72 and ∼2942.24 cm –1 for the as-prepared PVAM nonwoven membrane (Figure S1b, curve c′) are assigned to the −OH group and −CH asymmetric stretching band, respectively.…”

Treatment uniformity of atmospheric pressure plasma on flexible and porous material surface: A critical review

“…本课题组通过AC和纳秒脉冲六甲基二硅氧 烷 HMDSO/Ar/O 2 等离子体放电, 进行了卷对卷 超高分子量聚乙烯微孔隔膜(ultra-high molecular weight polyethylene, UHMWPE)的 实 时 沉 积 涂 层研究 [50,51] . 通过棒-板不对称电极设计, 率先成 功地在UHMWPE表面沉积了平均粒径100 nm 左右的SiO 2.01 C 0.23 H x 有机无机杂化纳米颗粒膜, X射 线 能 谱 仪 (energy dispersive X-ray spectrometer, EDS)研究发现12 µm厚、200 nm左右孔 隙的UHMWPE隔膜内部一定深度渗入了Si和 O元素, 如图7(b)和图7(c)所示.…”

“…尽管SiO 2.01 C 0.23 H x 杂化有机无机纳米颗粒薄 膜涂层很薄, 为纳米量级, 但经过涂覆的UHMW-PE隔膜由于 Si和O元素渗入内部一定深度, 耐 热收缩性达到商用5 µm厚度Al 2 O 3 纳米颗粒膜 涂层隔膜的水平; 涂层与隔膜表面黏结牢度更好, 如图8(a)所示. 同时, 样品也表现了更好的吸液能 力和更低的阻抗 [50,51] (f) Al 2 O 3 coating [50] . test [51] .…”

Thermosetting High-Rate and High-Safety Polymer/Inorganic Composite Separator for Lithium-Ion Battery through a Fast Scalable Photo Cross-Linking Process

“…Thus, the use of the thermoplastic polymers cannot solve this problem effectively. To tackle this issue, inorganic components such as Al 2 O 3 , , MgO, SiO 2 , , and TiO 2 have been introduced into the polymer matrix to further improve the thermal dimension stability of the separators. − However, the polymer part of the separator is mainly thermoplastic, which bears poor thermal dimension stability, leading to limited enhancement of the thermal stability. , Besides, the inorganic particles are mainly used as a minor component in the composite separator, making limited contribution to improve the thermal stability of the separator. , It is well-known that inorganic materials possess a superior thermal stability to organic materials. However, to our best knowledge, few studies have been reported to utilize inorganic materials as a major component for composite separator fabrication because it is difficult to manufacture a robust freestanding inorganic film with the thickness in the micrometer range.…”

“…Thus, the use of the thermoplastic polymers cannot solve this problem effectively. To tackle this issue, inorganic components such as Al 2 O 3 , 30,31 MgO, 32 SiO 2 , 33,34 and TiO 2 35 have been introduced into the polymer matrix to further improve the thermal dimension stability of the separators. 36−44 However, the polymer part of the separator is mainly thermoplastic, which bears poor thermal dimension stability, leading to limited enhancement of the thermal stability.…”