High-voltage and long-lasting aqueous chlorine-ion battery by virtue of "water-in-salt" electrolyte.

ABSTRACT: Chloride-ion battery (CIB) is regarded as a promising electrochemical storage device due to their high theoretical volumetric capacities, low cost, and high abundance. However, low-cycle life limits its application in the energy storage field. Herein, we report a rechargeable CIB composed of a "water-in-salt" electrolyte, a zinc anode, and a carbon cathode (graphene, carbon nanotubes, carbon black). These cathodes exhibit initial reversible specific capacities of 136, 108, and 102 mAh g^-1, respectively. Especially, a reversible discharge capacity of 95 mAh g^-1 was retained after 2000 cycles when graphene is used as the cathode. Such high cycling stability was first reported in CIBs. Furthermore, the use of "water-in-salt" electrolytes has improved the discharge platfo

SUBMITTER: Li T 

PROVIDER: S-EPMC7797922 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature