纳米片
阳极
材料科学
电极
二硒醚
锡
纳米技术
化学工程
钠离子电池
碳纤维
复合材料
化学
冶金
硒
物理化学
法拉第效率
复合数
工程类
作者
Jingzhuo Sun,Li Sun,Yi Dang,Wenhui Song,Wei Kan,Xiuwen Wang,Liang Xu,Huaping Zhao,Bing Zhao
标识
DOI:10.1016/j.diamond.2023.110261
摘要
Layered tin diselenide with high theoretical capacity and desirable redox voltage has emerged as a promising anode material for sodium-ion storage. However, achieving a highlight tin diselenide-based electrode that simultaneously exhibits prominent rate capability and ultralong cycling durability is the major challenge. Herein, highly efficient and durable SnSe2@CC nanosheet arrays were easily engineered based on the in situ growth of a SnO/SnO2 precursor on carbon cloth using a hydrothermal process followed by controlled selenation as an anode material for sodium-ion batteries. Benefiting from the uniformly vertical ultrathin nanosheet array morphology and the robust structural integrity of the self-supporting electrode, nanosheet aggregation and volume expansion were effectively alleviated, leading to fast reaction kinetics and satisfactory cycling ability. Thus, the resultant SnSe2@CC nanosheet arrays deliver an excellent reversible capacity of 604.7 mAh g−1 after 100 cycles at 0.1 A g−1, a rapid rate property with a specific capacity of 390.2 mAh g−1 at 5.0 A g−1 and ultral cycle lifespan with a reversible capacity of 350.4 mAh g−1 exceeding 1000 cycles. This research presents a novel method for the design and fabrication of advanced electrodes for sodium-ion storage.
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