Double-confined nanoheterostructure Sb/Sb_(2)S_(3)@Ti_(3)C_(2)T_(x)@C toward ultra-stable Li-/Na-ion batteries  

作　　者：Dan Wang Qun Ma Huan He Zhi-Yuan Wang Run-Guo Zheng Hong-Yu Sun Yan-Guo Liu Chun-Li Liu 

机构地区：[1]School of Materials Science and Engineering,Northeastern University,Shenyang110819,China [2]School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China [3]Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,Qinhuangdao 066004,China [4]Department of Physics and Oxide Research Center,Hankuk University of Foreign Studies,Yongin 17035,Korea

出　　处：《Rare Metals》2024年第5期2067-2079,共13页稀有金属（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52071073,52177208,52171202 and 51971055);Hebei Province"333 talent project"(No.C20221012);the Natural Science Foundation of Hebei Province(No.E2020501004);the Fundamental Research Funds for the Central Universities(No.N2123032);the Science and Technology Project of Hebei Education Department(No.BJK2023005)。

摘　　要：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 doubleconfined nanoheterostructure Sb/Sb_(2)S_(3)@Ti_(3)C_(2)T_(x)@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/Sb_(2)S_(3).The strong covalent bond(Ti-S,Ti-O-Sb,C-O-Sb)can firmly integrate Sb-based material with Ti_(3)C_(2)T_(x)and carbon,which significantly improves the structure stability.In addition,the carbon layer can restrain the oxidation of MXenes,and the nano-Sb/Sb_(2)S_(3)can facilitate electron/ion transport and suppress the restacking of MXenes.The heterogeneous interface between Sb and Sb_(2)S_(3)can further promote interfacial charge transfer.The MXene-Sb/Sb_(2)S_(3)@C-1 with the optimal Sb content shows high specific capacities,comparable rate properties and ultra-stable cycling performances(250 m Ah·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/Sb_(2)S_(3)@C-1.Cyclic voltammetry(CV)test results demonstrate that the pseudocapacitance behavior is dominant in MXene-Sb/Sb_(2)S_(3)@C-1,especially at large current.This design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices.

关 键 词：Sb/Sb_(2)S_(3) MXene Carbon ANODE Lithium-ion batteries Sodium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]