TY - JOUR
T1 - Manipulating anion intercalation enables a high-voltage aqueous dual ion battery
AU - HUANG, Zhaodong
AU - HOU, Yue
AU - WANG, Tairan
AU - ZHAO, Yuwei
AU - LIANG, Guojin
AU - LI, Xinliang
AU - GUO, Ying
AU - YANG, Qi
AU - CHEN, Ze
AU - LI, Qing
AU - MA, Longtao
AU - FAN, Jun
AU - ZHI, Chunyi
N1 - We acknowledge the financial support from the National Key R&D Program of China under Project 2019YFA0705104.
PY - 2021
Y1 - 2021
N2 - Aqueous graphite-based dual ion batteries have unique superiorities in stationary energy storage systems due to their non-transition metal configuration and safety properties. However, there is an absence of thorough study of the interactions between anions and water molecules and between anions and electrode materials, which is essential to achieve high output voltage. Here we reveal the four-stage intercalation process and energy conversion in a graphite cathode of anions with different configurations. The difference between the intercalation energy and hydration energy of bis(trifluoromethane)sulfonimide makes the best use of the electrochemical stability window of its electrolyte and delivers a high intercalation potential, while BF4− and CF3SO3− do not exhibit a satisfactory potential because the graphite intercalation potential of BF4− is inferior and the graphite intercalation potential of CF3SO3− exceeds the voltage window of its electrolyte. An aqueous dual ion battery based on the intercalation behaviors of bis(trifluoromethane)sulfonimide anions into a graphite cathode exhibits a high voltage of 2.2 V together with a specific energy of 242.74 Wh kg−1. This work provides clear guidance for the voltage plateau manipulation of anion intercalation into two-dimensional materials.
AB - Aqueous graphite-based dual ion batteries have unique superiorities in stationary energy storage systems due to their non-transition metal configuration and safety properties. However, there is an absence of thorough study of the interactions between anions and water molecules and between anions and electrode materials, which is essential to achieve high output voltage. Here we reveal the four-stage intercalation process and energy conversion in a graphite cathode of anions with different configurations. The difference between the intercalation energy and hydration energy of bis(trifluoromethane)sulfonimide makes the best use of the electrochemical stability window of its electrolyte and delivers a high intercalation potential, while BF4− and CF3SO3− do not exhibit a satisfactory potential because the graphite intercalation potential of BF4− is inferior and the graphite intercalation potential of CF3SO3− exceeds the voltage window of its electrolyte. An aqueous dual ion battery based on the intercalation behaviors of bis(trifluoromethane)sulfonimide anions into a graphite cathode exhibits a high voltage of 2.2 V together with a specific energy of 242.74 Wh kg−1. This work provides clear guidance for the voltage plateau manipulation of anion intercalation into two-dimensional materials.
UR - http://www.scopus.com/inward/record.url?scp=85106894854&partnerID=8YFLogxK
U2 - 10.1038/s41467-021-23369-5
DO - 10.1038/s41467-021-23369-5
M3 - Journal Article (refereed)
AN - SCOPUS:85106894854
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3106
ER -