Solid electrolyte interphase formation by propylene carbonate reduction for lithium anode

2017 ◽  
Vol 19 (42) ◽  
pp. 28772-28780 ◽  
Author(s):  
Qinlai Qian ◽  
Yifu Yang ◽  
Huixia Shao
Keyword(s):  
Solid Electrolyte ◽  
Propylene Carbonate ◽  
Solid Electrolyte Interphase ◽  
Scanning Electrochemical Microscopy ◽  
Lithium Anode ◽  
Electrochemical Microscopy

The reduction of PC occurs in two potential stages which was explored by scanning electrochemical microscopy.

scholarly journals Mastering the interface for advanced all-solid-state lithium rechargeable batteries

2016 ◽  
Vol 113 (47) ◽  
pp. 13313-13317 ◽  
Author(s):  
Yutao Li ◽  
Weidong Zhou ◽  
Xi Chen ◽  
Xujie Lü ◽  
Zhiming Cui ◽  
...  
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Rechargeable Batteries ◽  
Ion Conductivity ◽  
Rhombohedral Structure ◽  
Interfacial Resistance ◽  
Lithium Anode ◽  
Metal Anode ◽  
Li Ion

A solid electrolyte with a high Li-ion conductivity and a small interfacial resistance against a Li metal anode is a key component in all-solid-state Li metal batteries, but there is no ceramic oxide electrolyte available for this application except the thin-film Li-P oxynitride electrolyte; ceramic electrolytes are either easily reduced by Li metal or penetrated by Li dendrites in a short time. Here, we introduce a solid electrolyte LiZr2(PO4)3 with rhombohedral structure at room temperature that has a bulk Li-ion conductivity σLi = 2 × 10−4 S⋅cm−1 at 25 °C, a high electrochemical stability up to 5.5 V versus Li+/Li, and a small interfacial resistance for Li+ transfer. It reacts with a metallic lithium anode to form a Li+-conducting passivation layer (solid-electrolyte interphase) containing Li3P and Li8ZrO6 that is wet by the lithium anode and also wets the LiZr2(PO4)3 electrolyte. An all-solid-state Li/LiFePO4 cell with a polymer catholyte shows good cyclability and a long cycle life.

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