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Enabling Dual‐Ion Batteries via the Reversible Storage of Pyr 14 + Cations into Coronene Crystal
Author(s) -
Fang Yaobing,
Bi Wanying,
Wang Aiye,
Zheng Wen,
Yuan Wenhui,
Li Li
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000223
Subject(s) - coronene , anode , graphite , exfoliation joint , intercalation (chemistry) , materials science , ionic liquid , electrolyte , lithium (medication) , analytical chemistry (journal) , inorganic chemistry , graphene , chemistry , nanotechnology , organic chemistry , electrode , molecule , medicine , endocrinology , composite material , catalysis
Dual‐ion batteries with pure ionic liquid electrolyte (IL‐DIBs) have received increasing interest due to their sustainability, high operating voltage, and environmental friendliness. However, owing to the insertion/extraction of large‐size ionic liquid cations, the conventional IL‐DIBs with a graphite anode suffer from severe volume expansion and graphite exfoliation on the anode, causing a poor cycling performance. Herein, a novel IL‐DIB is constructed by introducing a bulk organic material (coronene) as the anode, against a natural graphite cathode. The results show that, in a voltage window range from 1.0 to 4.4 V, the battery has a high discharge specific capacity of ≈73.3 mA h g −1 and exhibits a good cycling performance for 450 cycles with a lower capacity loss of 0.061 mA h g −1 per cycle at a current density of 300 mA g −1 (3 C). Notably, it still maintains a considerable capacity of ≈55.8 mA h g −1 at a high rate of 10 C. In addition, the reversible intercalation/de‐intercalation of the Pyr 14 + cations into/from the coronene anode is investigated by ex situ X‐ray diffraction and Fourier transform infrared spectroscopy, showing an excellent structure stability of the coronene crystal during the charge–discharge process.