Synthesis of a calcium-bridged siloxene by a solid state reaction for optical and electrochemical properties

A Ca-bridged siloxene (Ca-siloxene) resulting from the deintercalation of Ca from CaSi2 was synthesized via a solid state reaction with ethanol wash using TaCl5. The presence of fragmented, two-dimensional siloxene planes with Ca bridging was confirmed. The Ca-siloxene exhibited tunable optical properties, as well as stable Li storage performance by Ca bridging.