AUTHOR=Wu Bo , Ma Ran , Liu Xuewei , Zheng Yuqi , Guo Sisheng , Yi Yanmeng , Sun Mingtai , Wang Suhua , Wen Tao 

TITLE=Self-assembly synthesis of petal-like MoS2/Co9S8/carbon nanohybrids for enhanced lithium storage performance

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.918494

DOI=10.3389/fenrg.2022.918494

ISSN=2296-598X

ABSTRACT=<p>Transition metal sulfides are favored as anode materials for the next generation of lithium-ion batteries because of their high theoretical capacities and abundant natural resources. However, serious volume changes during charging and discharging pose great challenges to their stability. In this work, petal-like MoS<sub>2</sub>/Co<sub>9</sub>S<sub>8</sub>/C nanohybrids were synthesized <italic>via</italic> the immobilization of molybdyl acetoacetonate MoO<sub>2</sub>(acac)<sub>2</sub> in ZIF-67 and subsequent combined vulcanization and thermolysis process. Benefiting from the homogeneous bimetallic sulfide and highly conductive carbon layer, the as-obtained MoS<sub>2</sub>/Co<sub>9</sub>S<sub>8</sub>/C nanohybrids exhibited a high initial discharge capacity of 988.3 mAh g<sup>−1</sup> at 200 mA g<sup>−1</sup> and a capacity retention &gt; 99.9% after 50 cycles. Even at a high current density of 1000 mA g<sup>−1</sup>, the reversible capacity of MoS<sub>2</sub>/Co<sub>9</sub>S<sub>8</sub>/C is still as high as 754.6 mAh g<sup>−1</sup>, revealing extraordinary rate ability. This work can provide a general approach to design and synthesize other advanced bimetallic chalcogenides for boosting lithium-ion batteries storage performance.</p>