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

Abstract

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