Flexible, solid-state, ion-conducting membrane with 3D garnet nanofiber networks for lithium batteries.

نویسندگان

  • Kun Kelvin Fu
  • Yunhui Gong
  • Jiaqi Dai
  • Amy Gong
  • Xiaogang Han
  • Yonggang Yao
  • Chengwei Wang
  • Yibo Wang
  • Yanan Chen
  • Chaoyi Yan
  • Yiju Li
  • Eric D Wachsman
  • Liangbing Hu
چکیده

Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium's highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to our knowledge, a 3D lithium-ion-conducting ceramic network based on garnet-type Li6.4La3Zr2Al0.2O12 (LLZO) lithium-ion conductor to provide continuous Li(+) transfer channels in a polyethylene oxide (PEO)-based composite. This composite structure further provides structural reinforcement to enhance the mechanical properties of the polymer matrix. The flexible solid-state electrolyte composite membrane exhibited an ionic conductivity of 2.5 × 10(-4) S/cm at room temperature. The membrane can effectively block dendrites in a symmetric Li | electrolyte | Li cell during repeated lithium stripping/plating at room temperature, with a current density of 0.2 mA/cm(2) for around 500 h and a current density of 0.5 mA/cm(2) for over 300 h. These results provide an all solid ion-conducting membrane that can be applied to flexible LIBs and other electrochemical energy storage systems, such as lithium-sulfur batteries.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 113 26  شماره 

صفحات  -

تاریخ انتشار 2016