Double-confined nanoheterostructure Sb/Sb2S3@Ti3C2Tx@C toward ultra-stable Li-/Na-ion batteries

Dan Wang ¹Qun Ma ²Huan He ²Zhi-Yuan Wang ¹Run-Guo Zheng ¹Hong-Yu Sun ³Yan-Guo Liu ¹Chun-Li Liu⁴

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作者信息

1. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,Qinhuangdao 066004,China
2. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China
3. School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China
4. Department of Physics and Oxide Research Center,Hankuk University of Foreign Studies,Yongin 17035,Korea
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Abstract

Antimony-based materials with high capacities and moderate potentials are promising anodes for lithium-/-sodium-ion batteries.However,their tremendous volume expansion and inferior conductivity lead to poor structural stability and sluggish reaction kinetics.Herein,a double-confined nanoheterostructure Sb/Sb2S3@Ti3C2Tx@C has been fabricated through a solvothermal method followed by low-temperature heat treatment.The dual protection of"MXene"and"carbon"can better accommodate the volume expansion of Sb/Sb2S3.The strong covalent bond(Ti-S,Ti-O-Sb,C-O-Sb)can firmly integrate Sb-based material with Ti3C2Tx and carbon,which significantly improves the struc-ture stability.In addition,the carbon layer can restrain the oxidation of MXenes,and the nano-Sb/Sb2S3 can facilitate electron/ion transport and suppress the restacking of MXenes.The heterogeneous interface between Sb and Sb2S3 can further promote interfacial charge transfer.The MXene-Sb/Sb2S3@C-1 with the optimal Sb content shows high specific capacities,comparable rate properties and ultra-stable cycling performances(250 mAh·g-1 after 2500 cycles at 1 A·g-1 for sodium-ion batteries).Ex situ X-ray diffractometer(XRD)test reveals the storage mechanism including the conversion and alloying process of MXene-Sb/Sb2S3@C-1.Cyclic voltammetry(CV)test results demonstrate that the pseudo-capacitance behavior is dominant in MXene-Sb/Sb2S3@C-1,especially at large current.This design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices.

Key words

Sb/Sb2S3/MXene/Carbon/Anode/Lithium-ion batteries/Sodium-ion batteries

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基金项目

National Natural Science Foundation of China(52071073)

National Natural Science Foundation of China(52177208)

National Natural Science Foundation of China(52171202)

National Natural Science Foundation of China(51971055)

Hebei Province"333 talent project"(C20221012)

Natural Science Foundation of Hebei Province(E2020501004)

Fundamental Research Funds for the Central Universities(N2123032)

Science and Technology Project of Hebei Education Department(BJK2023005)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量39

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