Journal of Nanoparticle Research ( IF 2.1 ) Pub Date : 2021-10-23 , DOI: 10.1007/s11051-021-05348-5 Lidan Fan 1, 2 , Liwei Yu 2 , Feng Xu 2 , Gang Qin 3, 4 , Qiang Chen 3
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Solid polymer electrolytes have promising applications in a wide variety of fields compared with liquid electrolytes; however, the promotion of ionic conductivity is still necessary and the composition with nanoparticles is an effective way. In this paper, the composite alkaline solid polymer electrolyte membrane is prepared from poly (vinyl alcohol) (PVA) and lanthanide oxide (La2O3) nanoparticle via solution casting method. The addition of La2O3 nanoparticle can hinder the crystallization of PVA, so as to obviously improve the ionic conductivity to 0.086 S·cm−1 with the content of 12 wt.%. Moreover, a three dimension of multi-porous structure is observed by SEM and abundant KOH electrolyte can be retained. Besides, an electrochemical stability window of 1.6 V is obtained. The conductivity is influenced by the temperature and the ratio between KOH and PVA, remarkably. In addition, nickel metal hydride battery is assembled with the discharge capacity of about 230 mAh·g−1, indicating that the PVA-La2O3-KOH ASPE is viable for utilization in Ni-MH battery.
Graphical abstract
中文翻译：
La2O3纳米颗粒填料的PVA基复合碱性固体聚合物电解质的制备
与液态电解质相比，固态聚合物电解质在广泛的领域具有广阔的应用前景。然而，离子电导率的提升仍然是必要的，与纳米粒子的组合是一种有效的方法。本文以聚乙烯醇(PVA)和镧系元素氧化物(La 2 O 3 )纳米粒子为原料，采用溶液浇铸法制备了复合碱性固体聚合物电解质膜。La 2 O 3纳米粒子的加入可以阻碍PVA的结晶，从而使离子电导率明显提高至0.086 S·cm -1含量为 12 wt.%。此外，SEM观察到三维多孔结构，可以保留丰富的KOH电解质。此外，还获得了 1.6 V 的电化学稳定性窗口。电导率受温度和 KOH 与 PVA 比例的影响显着。此外，组装的镍氢电池的放电容量约为230 mAh·g -1，表明PVA-La 2 O 3 -KOH ASPE 可用于镍氢电池。
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