A Redox-Active Organic Cation for Safer Metallic Lithium-Based Batteries.

ABSTRACT: Safety concerns have severely impeded the practical application of high-energy-density lithium-based batteries. Dendrite growth and overcharging can lead to particularly catastrophic thermal failure. Here we report an organic cation, trisaminocyclopropenium (TAC), as a bi-functional electrolyte additive to suppress dendrite growth and offer reversible overcharge protection for metallic lithium-based batteries. During the Li plating process, TAC cations with aliphatic chains can form a positively charged electrostatic shield around Li protrusions, repelling the approaching Li⁺ and thereby attaining a more uniform plating. A two times longer cycle life of 300 h at 1 mA cm^-2 is achieved in a Li|Li symmetric cell in comparison with the control. During the overcharging pro

SUBMITTER: Ji W 

PROVIDER: S-EPMC9012240 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature