Details

Autor(en) / Beteiligte

• Li, Yutao
• Xu, Biyi
• Xu, Henghui
• Duan, Huanan
• Lü, Xujie
• Xin, Sen
• Zhou, Weidong
• Xue, Leigang
• Fu, Gengtao
• Manthiram, Arumugam
• Goodenough, John B.

Titel

Hybrid Polymer/Garnet Electrolyte with a Small Interfacial Resistance for Lithium‐Ion Batteries

Ist Teil von

• Angewandte Chemie International Edition, 2017-01, Vol.56 (3), p.753-756

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Li7La3Zr2O12‐based Li‐rich garnets react with water and carbon dioxide in air to form a Li‐ion insulating Li2CO3 layer on the surface of the garnet particles, which results in a large interfacial resistance for Li‐ion transfer. Here, we introduce LiF to garnet Li6.5La3Zr1.5Ta0.5O12 (LLZT) to increase the stability of the garnet electrolyte against moist air; the garnet LLZT‐2 wt % LiF (LLZT‐2LiF) has less Li2CO3 on the surface and shows a small interfacial resistance with Li metal, a solid polymer electrolyte, and organic‐liquid electrolytes. An all‐solid‐state Li/polymer/LLZT‐2LiF/LiFePO4 battery has a high Coulombic efficiency and long cycle life; a Li‐S cell with the LLZT‐2LiF electrolyte as a separator, which blocks the polysulfide transport towards the Li‐metal, also has high Coulombic efficiency and kept 93 % of its capacity after 100 cycles. A LiF‐modified garnet, LLZT‐2LiF, has less Li2CO3 on the surface than the untreated compound and shows a small interfacial resistance with Li metal, a solid polymer electrolyte, and organic‐liquid electrolytes. An all‐solid‐state Li/polymer/LLZT‐2LiF/LiFePO4 battery has a high Coulombic efficiency and long cycle life.