兴奋剂
材料科学
离子
转化(遗传学)
相(物质)
纳米技术
化学工程
光电子学
化学
生物化学
有机化学
基因
工程类
作者
Hui Zhang,Shaocheng Zhang,Baiyu Guo,Li‐Juan Yu,Linlin Ma,Baoxiu Hou,Haiyan Liu,Shuaihua Zhang,Jiangyan Wang,Jianjun Song,Yongfu Tang,Xiaoxian Zhao
标识
DOI:10.1002/anie.202400285
摘要
Low Na+ and electron diffusion kinetics severely restrain the rate capability of MoS2 as anode for sodium-ion batteries (SIBs). Slow phase transitions between 2H and 1T, and from Nax MoS2 to Mo and Na2 S as well as the volume change during cycling, induce a poor cycling stability. Herein, an original Fe single atom doped MoS2 hollow multishelled structure (HoMS) is designed for the first time to address the above challenges. The Fe single atom in MoS2 promotes the electron transfer, companying with shortened charge diffusion path from unique HoMS, thereby achieving excellent rate capability. The strong adsorption with Na+ and self-catalysis of Fe single atom facilitates the reversible conversion between 2H and 1T, and from Nax MoS2 to Mo and Na2 S. Moreover, the buffering effect of HoMS on volume change during cycling improves the cyclic stability. Consequently, the Fe single atom doped MoS2 quadruple-shelled sphere exhibits a high specific capacity of 213.3 mAh g-1 at an ultrahigh current density of 30 A g-1 , which is superior to previously-reported results. Even at 5 A g-1 , 259.4 mAh g-1 (83.68 %) was reserved after 500 cycles. Such elaborate catalytic site decorated HoMS is also promising to realize other "fast-charging" high-energy-density rechargeable batteries.
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