电解质
阳极
聚电解质
化学工程
过电位
材料科学
Nafion公司
电导率
锂(药物)
电池(电)
极化(电化学)
快离子导体
无机化学
化学
作者
Qi Xiong,Gang Huang,Yue Yu,Chao‐Le Li,Jian‐Chen Li,Jun‐Min Yan,xin-bo Zhang
标识
DOI:10.1002/ange.202116635
摘要
The severe performance degradation of high-capacity Li−O2 batteries induced by Li dendrite growth and concentration polarization from the low Li+ transfer number of conventional electrolytes hinder their practical applications. Herein, lithiated Nafion (LN) with the sulfonic group immobilized on the perfluorinated backbone has been designed as a soluble lithium salt for preparing a less flammable polyelectrolyte solution, which not only simultaneously achieves a high Li+ transfer number (0.84) and conductivity (2.5 mS cm−1), but also the perfluorinated anion of LN produces a LiF-rich SEI for protecting the Li anode from dendrite growth. Thus, the Li−O2 battery with a LN-based electrolyte achieves an all-round performance improvement, like low charge overpotential (0.18 V), large discharge capacity (9508 mAh g−1), and excellent cycling performance (225 cycles). Besides, the fabricated pouch-type Li–air cells exhibit promising applications to power electronic equipment with satisfactory safety.
科研通智能强力驱动
Strongly Powered by AbleSci AI