Mo-MXene-filled gel polymer electrolyte for high-performance quasi-solid-state zinc metal batteries

被引:14
作者
Kumar, Deivasigamani Ranjith [1 ]
Karthik, Raj [1 ]
Hasan, Mahmudul [1 ]
Sayed, Mostafa Saad [1 ,2 ]
Shim, Jae-Jin [1 ]
机构
[1] Yeungnam Univ, Sch Chem Engn, 280 Daehak Ro, Gyongsan 38541, Gyeongbuk, South Korea
[2] Egyptian Petr Res Inst, Anal & Evaluat Dept, Nasr City, Cairo, Egypt
基金
新加坡国家研究基金会;
关键词
Electrochemical etching; MXene-filler; Gel electrolyte; Zinc-metal battery; Calcium vanadate; Mo3AlC2; MOLYBDENUM CARBIDE MXENE; THIN-FILMS; BEHAVIOR; NUMBERS;
D O I
10.1016/j.cej.2023.145207
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The production of MXenes from the MAX phase typically requires hydrofluoric acid etching, a process with significant toxicity and severe environmental implications. Given the wide-ranging applications of MXenes, developing a large-scale, environmentally benign chemical etching process is highly desirable. The goal of this study was to establish selective electrochemical aluminum etching (E-etching) from the Mo3AlC2 MAX phase using an innovative 1-ethyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide (EMITFSI) and zinc trifluoromethane sulfonate (Zn(OTF)(2)) battery electrolyte formulation. The E-etching technique effectively removes the "A" layer from the Mo3AlC2 MAX phase at 60 degrees C using a TFSI -based electrolyte. This method demonstrates that the resulting MXene terminal (T-x) contains O and OH groups. Subsequently, the resulting Mo2CTx MXene was embedded into a gel polymer electrolyte (GPE) as an inorganic filler. The Mo2CTx/EMITFSI/ Zn(OTF)(2)/poly(vinylidene fluoride-co-hexafluoropropylene) (PVHF) GPE membrane displayed excellent ionic conductivity, Zn2+ transference number, and galvanostatic Zn plating/stripping compatibility with Zn anodes. Finally, the performance of a zinc-metal battery using a belt-like CaV6O16 center dot 3H(2)O cathode was evaluated as a fullcell assembly of CaV6O16 center dot 3H(2)O//Mo(2)CTx/EMITFSI/Zn(OTF)(2)/PVHF//Zn. This assembly showcased an impressive capacity of 155 mA h g(-1), excellent durability (99%), coulombic efficiency approaching 100%, and excellent self-life over 200 h.
引用
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页数:11
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