电解质
聚合物
材料科学
化学工程
钠
聚合物电解质
离子
图层(电子)
电极
化学物理
双层(生物学)
化学
纳米技术
复合材料
离子电导率
有机化学
物理化学
冶金
工程类
作者
Jun Pan,Yuchen Zhang,Fu Sun,Markus Osenberg,André Hilger,Ingo Manke,Ruiguo Cao,Shixue Dou,H. M. Fan
标识
DOI:10.1002/anie.202219000
摘要
Unstable cathode-electrolyte and/or anode-electrolyte interface in polymer-based sodium-ion batteries (SIBs) will deteriorate their cycle performance. Herein, a unique solvated double-layer quasi-solid polymer electrolyte (SDL-QSPE) with high Na+ ion conductivity is designed to simultaneously improve stability on both cathode and anode sides. Different functional fillers are solvated with plasticizers to improve Na+ conductivity and thermal stability. The SDL-QSPE is laminated by cathode- and anode-facing polymer electrolyte to meet the independent interfacial requirements of the two electrodes. The interfacial evolution is elucidated by theoretical calculations and 3D X-ray microtomography analysis. The Na0.67 Mn2/3 Ni1/3 O2 |SDL-QSPE|Na batteries exhibit 80.4 mAh g-1 after 400 cycles at 1 C with the Coulombic efficiency close to 100 %, which significantly outperforms those batteries using the monolayer-structured QSPE.
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