Modified reaction kinetics in ester-based electrolyte to boost sodium storage performance: a case study of MoS2/Ti3C2Tx hybrid

被引:15
作者
Li, Jiabao [1 ]
Tang, Shaocong [1 ]
Li, Ziqian [1 ]
Hao, Jingjing [1 ]
Wang, Tianyi [1 ]
Pan, Likun [2 ]
Wang, Chengyin [1 ]
机构
[1] Yangzhou Univ, Sch Chem & Chem Engn, 180 Si Wang Ting Rd, Yangzhou 225002, Jiangsu, Peoples R China
[2] East China Normal Univ, Sch Phys & Elect Sci, Shanghai Key Lab Magnet Resonance, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
基金
中国国家自然科学基金;
关键词
LITHIUM-ION; ANODE MATERIALS; HARD CARBON; RATE CAPABILITY; BATTERIES; SOLVENTS; IMPACT; MOS2; FES2; LIFE;
D O I
10.1039/d2qi02302d
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Compared with ordinary ester-based electrolytes, the excellent match between ether-based electrolytes and transition-metal dichalcogenide (TMD) electrodes dramatically promotes their sodium storage performance. However, the origin of the superior electrochemical performance of TMD-based electrodes in ether-based electrolytes is still unclear. Herein, the MoS2/Ti3C2Tx MXene (MoS2/Ti3C2Tx) hybrid was taken as a typical example to reveal the fundamental principle of high Na+ storage performances with ether-based electrolytes. It has been demonstrated that the excellent long-term cyclability and reversibility of the MoS2/Ti3C2Tx electrode can be mainly ascribed to the gradual structure evolution to form a stable porous structure with efficient buffering for strain upon cycling. Additionally, the high pseudocapacitive effect and ionic kinetics in ether-based electrolyte accelerate the charge transfer and reduce the electrochemical polarization. Significantly, X-ray photoelectron spectroscopy and interfacial kinetic studies demonstrate that the ether-based electrolyte enables a dense and thin SEI layer, which reduces the energy barrier for desolvation and shortens the transportation length of the charge carriers. Consequently, the MoS2/Ti3C2Tx electrode exhibits excellent electrochemical performance in ether-based electrolyte, delivering a specific capacity of 288.2 mA h g(-1) after 3000 cycles at 3.0 A g(-1). Significantly, this work is essential for revealing the advantages of ether-based electrolytes for TMD-based electrodes in terms of rapid reaction kinetics, promoting their practical application in sodium-ion battery chemistry.
引用
收藏
页码:1357 / 1368
页数:12
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