Video: Organic Electrode Materials in Sodium-Ion Batteries

Sodium-ion batteries using organic electrode materials are a promising alternative to state-of-the-art lithium-ion batteries. However, their practical viability is hindered by challenges such as a low specific capacity of the organic electrode materials, or their dissolution in the electrolyte. We herein present a double mitigation strategy to enhance the performance of pillar[5]quinone (P5Q) as positive electrode in sodium batteries. Using 5 M sodium bis(fluorosulfonyl)imide in succinonitrile as highly concentrated electrolyte, and encapsulating P5Q in CMK-3 (Carbon Mesostructured by KAIST with hexagonally ordered rod-like carbon domains) as templated ordered mesoporous carbon, we achieve a record cycling performance with improved cycling stability even at elevated temperature (40 °C).