A Lithiated Perfluorinated Sulfonic Acid Polymer Electrolyte for Lithium-Oxygen Batteries
A Lithiated Perfluorinated Sulfonic Acid Polymer Electrolyte for Lithium-Oxygen Batteries
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锂氧电池用锂化全氟磺酸聚合物电解质
DOI：
10.1149/2.1281709jes
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发表时间：
2017
影响因子：
3.9
通讯作者：
Yang Jun
中科院分区：
文献类型：
--
作者：
Shi Yanqiong;Wu Chaolumen;Li Lei;Yang Jun
以全氟磺酸锂离子聚合物（PFSA-Li）和聚四氟乙烯（PTFE）为原料，制备了一种新型聚合物电解质，并对其在锂氧电池中的性能进行了评价。在该聚合物电解质中，多孔PTFE膜用作支撑基底以提供机械强度和尺寸稳定性，并且PFSA-Li离聚物用作聚合物电解质以填充到PTFE基底的孔中。在用无水二甲基亚砜溶剂溶胀后，PFSA-Li/PTFE聚合物电解质显示出1.5 × 10 - 4 S cm-1的高室温离子电导率和0.84的高锂迁移数。其在锂氧电池中的使用表现出与锂阳极的优异相容性，具有稳定的界面性质和无枝晶的Li沉积。在1000 mAh g-1下，该电池具有良好的90次循环稳定性和高达2 A g-1的倍率性能，为开发大容量高能量高功率的聚合物电解质锂氧电池提供了一种可行的策略。
A novel polymer electrolyte based on lithiated perfluorinated sulfonic acid ionomer (PFSA-Li) and poly (tetrafluoroethylene)(PTFE) was prepared, and its performance in the Li-O 2 batteries was evaluated. In this polymer electrolyte, porous PTFE membrane was used as supporting substrate to provide mechanical strength and dimensional stability, and PFSA-Li ionomer was employed as polymer electrolyte to fill into the pores of the PTFE substrate. After swollen with anhydrous dimethyl sulfoxide solvent, the PFSA-Li/PTFE polymer electrolyte showed a high room temperature ionic conductivity of 1.5× 10− 4 S cm− 1 and a high lithium transference number of 0.84. Its use in a lithium-oxygen battery demonstrated excellent compatibility to lithium anode with stable interface property and dendrite-free Li deposition. A good cycling stability over 90 cycles at 1000 mAh g− 1 and rate capability up to 2 A g− 1 were obtained suggesting a feasible strategy for developing large-scale Li-O 2 battery systems toward high energy and high power application with polymer electrolytes.
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