A Three-Dimensional, Flexible Conductive Network Based on an MXene/Rubber Composite for Lithium Metal Anodes

被引:0
作者
Sun, Bin [1 ,2 ]
Zhang, Miao [1 ]
Yuan, Hongxin [3 ]
Wei, Wei [2 ]
Lin, Zhenhua [2 ]
Chang, Jingjing [1 ,2 ]
Hao, Yue [2 ]
机构
[1] Xidian Univ, Acad Adv Interdisciplinary Res, Xian 710071, Peoples R China
[2] Xidian Univ, Sch Microelect, State Key Discipline Lab Wide Band Gap Semicond Te, Xian 710071, Peoples R China
[3] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
基金
中国国家自然科学基金;
关键词
Porous; MXene; ENR; lithium metalanode; flexible batteries; SOLID-ELECTROLYTE INTERPHASE; POROUS CARBONS; BATTERIES; CATHODES; MATRIX; PEEL;
D O I
10.1021/acsami.4c15406
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Flexibility enhancement is a pressing issue in the current development of advanced lithium-metal battery applications. Many types of organic polymers are inherently flexible, which can form a composite structure enhancing electrode flexibility. However, organic polymers have a negative influence on the plating and stripping of lithium-metal anodes, and the large number of polymers block the pore of the material, reducing the utilization of the active site. Herein, we report a flexible porous substrate as an anode host based on a serine-modified three-dimensional structure of MXene and epoxidized natural rubber composite (3D/MXene-S-ENR), in which lithium ions can uniformly deposit in the interconnected pore structure. The 3D/MXene-S-ENR, having more nucleation sites, can effectively improve the uniformity of lithium metal, which effectively reduces the local current density and inhibits lithium dendrites. Compared with the serine-modified MXene and the epoxidized natural rubber electrode (MXene-S-ENR), the 3D/MXene-S-ENR electrode has lower overpotential and stable cycling. The lithium-sulfur batteries (Li-S) based on the 3D/MXene-S-ENR anode and sulfur cathode (3D/MXene-S-ENR@Li|S/C) deliver a stable discharge capacity of 316.2 mAh g-1 after 350 cycles, with a Coulombic efficiency of 98.05%. Finally, we assembled a flexible pack battery, which demonstrates the potential value of the 3D/MXene-S-ENR anode in high-performance flexible lithium-sulfur batteries.
引用
收藏
页码:3248 / 3256
页数:9
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