Solid polymer electrolytes based on crosslinkable polyoctahedral silsesquioxanes (POSS) for room temperature lithium polymer batteries
Solid polymer electrolytes based on crosslinkable polyoctahedral silsesquioxanes (POSS) for room temperature lithium polymer batteries
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DOI：
10.1007/s10008-009-0968-1
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发表时间：
2010-08
影响因子：
2.5
通讯作者：
J. Y. Lee;Y. Lee;B. Bhattacharya;Y. Nho;Jung-Ki Park
中科院分区：
文献类型：
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作者：
J. Y. Lee;Y. Lee;B. Bhattacharya;Y. Nho;Jung-Ki Park
以八面体倍半硅氧烷（POSS）为交联剂，通过自由基聚合制备了聚合物固体电解质（SPE）。通过引入具有多官能团的可交联POSS，大大提高了离子电导率。用5 wt.%交联剂在室温下的离子电导率为5.3 × 10−4S cm− 1。SPE中不挥发性增塑剂聚乙二醇二甲醚的含量可提高到95 wt没有任何泄漏。发现SPE在高达5.3 V的电压下电化学稳定。由Li/SPE/LiCoO 2组成的锂聚合物电池在室温下即使在0.1C的速率下在20次循环后也表现出80%的初始放电容量，这对于室温下锂聚合物电池的实际考虑是实质性的改进。
Solid polymer electrolytes (SPE), based on polyoctahedral silsesquioxanes (POSS) as a crosslinking agent, were prepared by radical polymerization. The ionic conductivity is greatly enhanced by introduction of crosslinkable POSS with multifunctional groups. The SPE prepared with 5 wt.% crosslinking agent shows an ionic conductivity of 5.3 × 10−4S cm−1at room temperature. The content of nonvolatile plasticizer, poly(ethylene glycol) dimethyl ether, in the SPE, could be raised to 95 wt.% without any leakage. The SPE is found to be electrochemically stable up to 5.3 V. Lithium polymer cell consisting of Li/SPE/LiCoO2exhibits 80% of initial discharge capacity even at the rate of 0.1 C at room temperature after 20 cycles, which is a substantial improvement for practical consideration of lithium polymer batteries at room temperature.