MoS2 Nanosheets Vertically Grown on Carbonized Corn Stalks as Lithium-Ion Battery Anode

In this study, MoS2 nanosheets are vertically grown on the inside and outside surfaces of the carbonized corn stalks (CCS) by a simple hydrothermal reaction. The vertically grown structure can not only improve the transmission rate of Li+ and electrons but also avoid the agglomeration of the nanosheets. Meanwhile, a new approach of biomass source application is presented. We use CCS instead of graphite powders, which can not only avoid the exploitation of graphite resources, but also be used as a matrix for MoS2 growth to prevent the electrode from being further decomposed during long cycles and at high current densities. Meanwhile, lithium-ion batteries show remarkable electrochemical performance. They demonstrate a high specific capacity of 1409.5 mA g–1 at 100 mA g–1 in the initial cycle. After 250 cycles, the discharge capacity is still as high as 1230.9 mAh g–1. Even at 4000 mA g–1, they show a high specific capacity of 777.7 mAh g–1. Furthermore, the MoS2/CCS electrodes show long cycle life, and the specific capacity is still up to ～500 mAh g–1 at 5000 mA g–1 after 1000 cycles