Fang Yongjin, Luan Deyan, Chen Ye, Gao Shuyan, Lou Xiong Wen David
School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, P. R. China.
Angew Chem Int Ed Engl. 2020 Apr 27;59(18):7178-7183. doi: 10.1002/anie.201915917. Epub 2020 Mar 10.
Hybrid materials, integrating the merits of individual components, are ideal structures for efficient sodium storage. However, the construction of hybrid structures with decent physical/electrochemical properties is still challenging. Now, the elaborate design and synthesis of hierarchical nanoboxes composed of three-layered Cu S@carbon@MoS as anode materials for sodium-ion batteries is reported. Through a facile multistep template-engaged strategy, ultrathin MoS nanosheets are grown on nitrogen-doped carbon-coated Cu S nanoboxes to realize the Cu S@carbon@MoS configuration. The design shortens the diffusion path of electrons/Na ions, accommodates the volume change of electrodes during cycling, enhances the electric conductivity of the hybrids, and offers abundant active sites for sodium uptake. By virtue of these advantages, these three-layered Cu S@carbon@MoS hierarchical nanoboxes show excellent electrochemical properties in terms of decent rate capability and stable cycle life.
混合材料整合了各组分的优点，是高效储钠的理想结构。然而，构建具有良好物理/电化学性能的混合结构仍然具有挑战性。现在，报道了由三层CuS@碳@MoS组成的分级纳米盒作为钠离子电池负极材料的精心设计与合成。通过一种简便的多步模板参与策略，在氮掺杂碳包覆的CuS纳米盒上生长超薄MoS纳米片，以实现CuS@碳@MoS结构。该设计缩短了电子/钠离子的扩散路径，适应了电极在循环过程中的体积变化，提高了混合材料的电导率，并为钠的吸收提供了丰富的活性位点。凭借这些优势，这些三层CuS@碳@MoS分级纳米盒在良好的倍率性能和稳定的循环寿命方面表现出优异的电化学性能。
