A bifunctional ion-electron conducting interlayer for high energy density all-solid-state lithium-sulfur battery

作者：Zhu, Yuewu; Li, Jie; Liu, Jin^*

来源：Journal of Power Sources, 2017, 351: 17-25.

DOI：10.1016/j.jpowsour.2017.03.072

• Ion-electron conductor
• All-solid-state
• Lithium-sulfur battery
• Active material utilization
• Battery configuration

A bifunctional ion-electron conducting layer is designed for all-solid-state lithium-sulfur battery. This layer consists of electronic conductor and solid polymer electrolyte that is intercalated between the cathode and electrolyte. By forming a gradient of electrons and lithium ions, the electrochemical performance and interfacial compatibility of the battery are obviously enhanced. When a pure sulfur powder is directly used as an active material of the cathode, the battery with the interlayer delivers the initial discharge capacity of 1457 mAh g(-1) and the discharge capacity of 792.8 mAh g(-1) after 50 cycles at 0.5 C and 80 degrees C, while the battery with the same cathode and without the interlayer only has the discharge capacity of 291.9 mAh g(-1) after the same number of cycles.

• 出版日期2017-5-31
• 单位中南大学