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论文类型：期刊论文

发表时间：2019-10-01

发表刊物：POLYMER BULLETIN

收录刊物：EI、SCIE

卷号：76

期号：10

页面范围：5451-5462

ISSN号：0170-0839

关键字：Lithium-ion battery; Separator; Electrospinning; PPESK; Mechanical strength

摘要：The electrospun fibrous membranes used as lithium-ion battery separators have been widely studied due to the advantages of high porosity, large specific surface area and adjustable structural characteristics. In order to obtain thermal stable and high-strength electrospun fibrous membranes for lithium-ion battery separators, the oriented poly(phthalazinone ether sulfone ketone) (PPESK) fibrous membranes were fabricated and then hot pressed with two pieces of membranes overlaid perpendicularly. The prepared hot-pressed composite oriented PPESK membranes show high tensile strength of 22.8 MPa at both horizontal and vertical directions. The hot-pressed oriented PPESK membranes are thermally dimensional stable even at the high temperature of 200 degrees C. In addition, the novel PPESK fibrous membranes exhibit high porosity (70%), superior electrolyte uptake (525%), low interfacial resistance (268 ohm) with electrodes and excellent ionic conductivity (1.39 mS cm(-1)). The simulated cells using the new separators show high discharge capacity and excellent rate capability, which demonstrates the novel membranes have potential to be used as separators for power lithium-ion batteries.