Sustainable carbon-sheets and their MnO–C hybrid for Li-ion batteries

Abstract

The future development of large-scale energy store systems requires Li-ion batteries (LIBs) with not only an outstanding electrochemical performance but also sustainability and cost-effectiveness. Herein, unique carbon-sheets (CSs) with rich porosity and high graphitization have been synthesized from sugarcane-stalk for LIBs application. These derived CSs exhibit a superior electrochemical behavior to commercial graphite. Moreover, the performance of CSs can be further upgraded by growing MnO nanoparticles to form a synergetic MnO–C hybrid. As a result, the MnO–C hybrid shows a high capacity, excellent rate capability (354 mA h g⁻¹ at 3 A g⁻¹), and superior cycling performance (814 mA h g⁻¹ at 0.2 A g⁻¹ after 400 cycles).