聚烯烃
碳酸乙烯酯
分离器(采油)
碳酸丙烯酯
微型多孔材料
碳酸二乙酯
电解质
材料科学
复合数
纤维素乙醇
化学工程
锂(药物)
多收费
复合材料
化学
纤维素
电极
电池(电)
医学
工程类
内分泌学
功率(物理)
物理
图层(电子)
物理化学
量子力学
热力学
标识
DOI:10.1016/s0378-7753(96)02450-0
摘要
Thin composite cellulosic separators (39–85 lem thickness), composed of fine fibrilliform cellulosic fibres (diameter 0.5 to 5.0 μm) embedded in microporous (pore diameter: 10–200 nm) cellulosic film and soaked in ethylene carbonate or other aprotic solvent, are found to possess fair-to-moderate physical strength, an apparent complete freedom from pinholes, and a complex impedance equal to or lower than that of conventional polyolefin separators for rechargeable lithium-ion batteries. Laboratory-scale cells that comprise LiCoO2/petroleum coke electrodes, 1.0 M LiBF4/PC:EC:BL (25:25:50 by volume, propylene carbonate:ethylene carbonate: γ-butyrolactone) electrolyte and the cellulosic separators exhibit good initial discharge capacity and capacity retention over 41 charge/discharge cycles. The latter are indistinguishable from those obtained from a similar cell with conventional polyolefin separator.
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