Manipulating anion intercalation enables a high-voltage aqueous dual ion battery.

ABSTRACT: 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

SUBMITTER: Huang Z 

PROVIDER: S-EPMC8149852 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature