Li Zhuanxia, Yu Lianghao, Tao Xin, Li Yun, Zhang Linlin, He Xuedong, Chen Yan, Xiong Sha, Hu Wei, Li Jun, Wang Jichang, Jin Huile, Wang Shun
Key Lab of Advanced Energy Storage and Conversion, Zhejiang Province Key Lab of Leather Engineering, College of Chemistry and Materials Engineering, Wenzhou University Wenzhou, Zhejiang, 325035, P. R. China.
Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices, Institute of New Materials and Industrial Technologies, Wenzhou University, Wenzhou, Zhejiang, 325035, P. R. China.
Small. 2024 Feb;20(6):e2304124. doi: 10.1002/smll.202304124. Epub 2023 Sep 25.
Sodium-ion batteries are a promising substitute for lithium batteries due to the abundant resources and low cost of sodium. Herein, honeycomb-shaped MoSe /reduced graphene oxide (rGO) composite materials are synthesized from graphene oxide (GO) and MoSe through a one-step solvothermal process. Experiments show that the 3D honeycomb structure provides excellent electrolyte penetration while alleviating the volume change during electrochemical cycling. An anode prepared with MoSe /rGO composites exhibits significantly improved sodium-ion storage properties, where a large reversible capacity of 215 mAh g is obtained after 2700 cycles at the current density of 30.0 A g or after 5900 cycles at 8.0 A g . When such an anode is paired with Na V (PO ) to form a full cell, a reversible specific capacity of 107.5 mAh g can be retained after 1000 cycles at the current of 1.0 A g . Transmission electron microscopy, X-ray photoelectron spectroscopy and in situ X-ray diffraction (XRD) characterization reveal the reversible storage reaction of Na ions in the MoSe /rGO composites. The significantly enhanced sodium storage capacity is attributed to the unique honeycomb microstructure and the use of ether-based electrolytes. This study illustrates that combining rGO with ether-based electrolytes has tremendous potential in constructing high-performance sodium-ion batteries.
由于钠资源丰富且成本低廉，钠离子电池是锂电池的一种有前景的替代品。在此，通过一步溶剂热法由氧化石墨烯（GO）和MoSe合成了蜂窝状MoSe/还原氧化石墨烯（rGO）复合材料。实验表明，三维蜂窝结构在缓解电化学循环过程中的体积变化的同时，提供了优异的电解质渗透性。用MoSe/rGO复合材料制备的阳极表现出显著改善的钠离子存储性能，在30.0 A g的电流密度下经过2700次循环或在8.0 A g下经过5900次循环后，可获得215 mAh g的大可逆容量。当这种阳极与NaV(PO)配对形成全电池时，在1.0 A g的电流下经过1000次循环后，可保留107.5 mAh g的可逆比容量。透射电子显微镜、X射线光电子能谱和原位X射线衍射（XRD）表征揭示了Na离子在MoSe/rGO复合材料中的可逆存储反应。显著增强的储钠容量归因于独特的蜂窝微观结构和醚基电解质的使用。这项研究表明，将rGO与醚基电解质结合在构建高性能钠离子电池方面具有巨大潜力。
