Preparation and Electrochemical Performance of Carbyne Polysulfide as a Cathode Material for Lithium Batteries

Abstract

The product obtained by co-heating carbon containing carbyne moieties and element sulfur was characterized by ¹³C-NMR, XRD, and SEM, and it was proved to have carbon skeleton with polysulfide attached on it, which resembles the theoretical structure of carbyne polysulfide. This material exhibited a high capacity of 600mA·h/g at 400mA/cm² at first cycle and a very stable reversible capacity of 380mA·h/g after 200cycles. This material is nearly 100%efficient during charge/discharge.