阳极
材料科学
电解质
电极
电化学
扩散
离子
石墨烯
锂(药物)
电导率
化学工程
离子运输机
电流密度
金属
钠
纳米技术
冶金
热力学
物理
工程类
内分泌学
医学
物理化学
化学
量子力学
作者
Xueli Geng,Yucong Jiao,Han Yang,Alolika Mukhopadhyay,Lei Yang,Hongli Zhu
标识
DOI:10.1002/adfm.201702998
摘要
Abstract This work studies for the first time the metallic 1T MoS 2 sandwich grown on graphene tube as a freestanding intercalation anode for promising sodium‐ion batteries (SIBs). Sodium is earth‐abundant and readily accessible. Compared to lithium, the main challenge of sodium‐ion batteries is its sluggish ion diffusion kinetic. The freestanding, porous, hollow structure of the electrode allows maximum electrolyte accessibility to benefit the transportation of Na + ions. Meanwhile, the metallic MoS 2 provides excellent electron conductivity. The obtained 1T MoS 2 electrode exhibits excellent electrochemical performance: a high reversible capacity of 313 mAh g −1 at a current density of 0.05 A g −1 after 200 cycles and a high rate capability of 175 mAh g −1 at 2 A g −1 . The underlying mechanism of high rate performance of 1T MoS 2 for SIBs is the high electrical conductivity and excellent ion accessibility. This study sheds light on using the 1T MoS 2 as a novel anode for SIBs.
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