Department of Materials Science and Engineering , Korea University , 1, 5-Ga, Anam-dong, Sungbuk-gu, Seoul 136-701 , Republic of Korea.
School of Chemical and Biological Engineering and Institute of Chemical Process , Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742 , Republic of Korea.
ACS Appl Mater Interfaces. 2018 May 9;10(18):15634-15641. doi: 10.1021/acsami.8b00529. Epub 2018 Apr 30.
As interest in electric vehicles and mass energy storage systems continues to grow, Li-O batteries are attracting much attention as a candidate for next-generation energy storage systems owing to their high energy density. However, safety problems related to the use of lithium metal anodes have hampered the commercialization of Li-O batteries. Herein, we introduced a quasi-solid polymer electrolyte with excellent electrochemical, chemical, and thermal stabilities into Li-O batteries. The ion-conducting QSPE was prepared by gelling a polymer network matrix consisting of poly(ethylene glycol) methyl ether methacrylate, methacrylated tannic acid, lithium trifluoromethanesulfonate, and nanofumed silica with a small amount of liquid electrolyte. The quasi-solid-state Li-O cell consisted of a lithium powder anode, a quasi-solid polymer electrolyte, and a PdCo/multiwalled carbon nanotube cathode, which enhanced the electrochemical performance of the cell. This cell, which exhibited improved safety owing to the suppression of lithium dendrite growth, achieved a lifetime of 125 cycles at room temperature. These results show that the introduction of a quasi-solid electrolyte is a potentially new alternative for the commercialization of solid-state Li-O batteries.
随着对电动汽车和大规模储能系统的兴趣不断增长，由于其高能量密度，锂氧电池作为下一代储能系统的候选者引起了广泛关注。然而，与使用金属锂阳极相关的安全问题阻碍了锂氧电池的商业化。在此，我们将具有优异电化学、化学和热稳定性的准固态聚合物电解质引入锂氧电池中。离子传导 QSPE 通过将聚（乙二醇）甲基醚甲基丙烯酸酯、甲基丙烯酰化单宁酸、三氟甲烷磺酸锂和纳米气相二氧化硅组成的聚合物网络基质与少量液体电解质凝胶化而制备。准固态锂氧电池由锂粉阳极、准固态聚合物电解质和 PdCo/多壁碳纳米管阴极组成，这提高了电池的电化学性能。由于抑制了锂枝晶的生长，该电池提高了安全性，在室温下实现了 125 次循环的寿命。这些结果表明，引入准固态电解质是固态锂氧电池商业化的一种有潜力的新方法。
