Ultralong-life and high-capacity magnesium/sodium hybrid-ion battery using a ternary CoSe/NiSe < sub > 2 < /sub > /CuSe < sub > 2 < /sub > cathode and dual-ion electrolyte

Chem Commun (Camb). 2024 Apr 26. doi: 10.1039/d4cc00623b. Online ahead of print.ABSTRACTAn ultrahigh-performance magnesium/sodium hybrid-ion battery (MNHB) is developed using ternary CoSe/NiSe2/CuSe2 (CNCS) "micro-flowers" as cathode materials, working with a coordinative [Mg2Cl2][AlCl4]2 and bis(trifluoroethylsulfonyl)imide anionic sodium salt in triglyme electrolyte. After 2000 cycles at 2.0 A g-1, the MNHB shows a stable capacity of 115.5 mA h g-1 and a high Coulombic efficiency exceeding 99.8%. The battery shows very rapid charging, and good stability in extreme environments, providing new opportunities to develop other hybrid-ion systems.PMID:38668872 | DOI:10.1039/d4cc00623b
Source: Chemical Communications - Category: Chemistry Authors: Source Type: research