Rao Yu, Zhu Kongjun, Zhang Guoliang, Dang Feng, Chen Jiatao, Liang Penghua, Kong Zhihan, Guo Jun, Zheng Hongjuan, Zhang Jie, Yan Kang, Liu Jinsong, Wang Jing
State Key Laboratory of Mechanics and Control for Aerospace Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
ACS Appl Mater Interfaces. 2023 Dec 6;15(48):55734-55744. doi: 10.1021/acsami.3c12385. Epub 2023 Nov 20.
Molybdenum sulfide has been widely investigated as a prospective anode material for Li/Na storage because of its unique layered structure and high theoretical capacity. However, the enormous volume variation and poor conductivity limit the development of molybdenum sulfide. The rational design of a heterogeneous interface is of great importance to improve the structure stability and electrical conductivity of electrode materials. Herein, a high-temperature mixing method is implemented in the hydrothermal process to synthesize the hybrid structure of MoS/VO@carbon-graphene (MoS/VO@C-rGO). The MoS/VO@C-rGO composites exhibit superior Li/Na storage performance due to the construction of the interface between the MoS and VO components and the introduction of carbon materials, delivering a prominent reversible capacity of 564 mAh g at 1 A g after 600 cycles for lithium-ion batteries and 376.3 mAh g at 1 A g after 450 cycles for sodium-ion batteries. Theoretical calculations confirm that the construction of the interface between the MoS and VO components can accelerate the reaction kinetics and enhance the charge-ionic transport of molybdenum sulfide. The results illustrate that interfacial engineering may be an effective guide to obtain high-performance electrode materials for Li/Na storage.
硫化钼因其独特的层状结构和高理论容量，作为一种用于锂/钠存储的潜在负极材料受到了广泛研究。然而，巨大的体积变化和较差的导电性限制了硫化钼的发展。合理设计异质界面对于提高电极材料的结构稳定性和导电性至关重要。在此，在水热过程中采用高温混合法合成了MoS/VO@碳-石墨烯（MoS/VO@C-rGO）的混合结构。MoS/VO@C-rGO复合材料由于在MoS和VO组分之间构建了界面以及引入了碳材料，展现出优异的锂/钠存储性能，对于锂离子电池，在1 A g下循环600次后具有564 mAh g的突出可逆容量，对于钠离子电池，在1 A g下循环450次后具有376.3 mAh g的可逆容量。理论计算证实，MoS和VO组分之间界面的构建可以加速反应动力学并增强硫化钼的电荷-离子传输。结果表明，界面工程可能是获得用于锂/钠存储的高性能电极材料的有效指导。
