Structure and electrochemical performance of MoS2 based on different molybdenum-sulfur mole ratios

Abstract

In this paper, MoS2 materials have been fabricated by a facile hydrothermal method, and the influences of molybdenum-sulfur mole ratios on samples’ structure and electrochemical lithium storage performance have been studied in detail. The results indicate that MoS2-3 with a molybdenum-sulfur mole ratio of 1:4 presents uniform flower-like microspheres structure (with an average diameter of about 2 μm) consisted of nanosheets with dozens of nanometers in thickness, and plentiful co-crosslinked pore structure are formed by these nanosheets. Moreover, good crystallinity and appropriate defects can be detected from MoS2-3. Benefitting from the unique structure, MoS2-3 displays superior electrochemical lithium storage performance in comparison with MoS2 materials with other molybdenum-sulfur mole ratios, which displays excellent cycling stability with a reversible specific capacity of 539 mAh/g at 0.1 A/g after 200 cycles and a favorable rate capability of 550 mAh/g at 1 A/g.