Synthesis of an aliphatic hyper-branched polycarbonate and determination of its physical properties for solid polymer electrolyte use
Synthesis of an aliphatic hyper-branched polycarbonate and determination of its physical properties for solid polymer electrolyte use
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脂肪族超支化聚碳酸酯的合成及其用于固体聚合物电解质的物理性能的测定
DOI：
10.1016/j.polymer.2018.05.010
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发表时间：
2018
期刊：
影响因子：
4.6
通讯作者：
Moriguchi Isamu
中科院分区：
文献类型：
--
作者：
Motokucho Suguru;Yamada Hirotoshi;Suga Yusuke;Morikawa Hiroshi;Nakatani Hisayuki;Urita Kouki;Moriguchi Isamu
合成了一种脂肪族超支化聚碳酸酯（HBPC）作为新型聚合物固体电解质（SPE）的主体材料。通过A2+ B3聚合反应合成HBPC，得到支化聚碳酸酯结构。通过干燥HBPC和1- 60mol%LiClO4的混合溶液制备HBPC基SPE膜。基于HBPC的SPE的5%重量损失的温度（Td 5s）在174.4-189.3 °C的范围内，高于正常使用中的温度。对于20 mol%锂含量，HBPC基SPE的离子电导率（70 °C时为1.86 × 10−4S·cm− 1，30 °C时为8.52 × 10−6S·cm− 1）高于聚碳酸亚丙酯（LPC）基SPE（70 °C时为4.79 × 10−6S·cm− 1，30 °C时为8.32 × 10− 8 S·cm− 1）。基于HBPC和LPC的SPE的锂离子传输活化能估计分别为11.47和15.88 kJ·mol-1。在聚碳酸酯中引入这种支链结构对于促进锂离子传输是有效的。
An aliphatic hyper-branched polycarbonate (HBPC) was synthesized as a novel host material for solid polymer electrolytes (SPEs). The HBPC was synthesized through A2+ B3polymerization to yield a branched polycarbonate structure. HBPC-based SPE films were prepared by drying mixed solutions of HBPC and 1–60 mol% LiClO4. The temperatures for 5% weight loss (Td5s) of the HBPC-based SPEs were in the range of 174.4–189.3 °C, higher than those in normal use. The HBPC-based SPE exhibited higher ionic conductivities (1.86 × 10−4S∙cm−1at 70 °C and 8.52 × 10−6S∙cm−1at 30 °C) than a poly(trimethylene carbonate) (LPC)-based SPE (4.79 × 10−6S∙cm−1at 70 °C and 8.32 × 10−8S∙cm−1at 30 °C) for 20 mol% lithium content. Activation energies of lithium ion transport for the HBPC- and LPC-based SPEs were estimated to be 11.47 and 15.88 kJ∙mol−1, respectively. Introduction of this branched structure in polycarbonates is effective for promoting lithium ion transport.