Sb/Sb4O5Cl2/C composite as a stable anode for sodium-ion batteries

被引：0
作者：
Plotek, Justyna [1 ]
Kulka, Andrzej [1 ]
Maximenko, Alexey [2 ]
Kondracki, Lukasz [3 ]
Trabesinger, Sigita [3 ]
Moździerz, Maciej [1 ]
Czaja, Pawel [4 ]
Molenda, Janina [1 ]
机构：
[1] Faculty of Energy and Fuels, AGH University of Krakow, al. Mickiewicza 30, Krakow
[2] SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, Czerwone Maki 98, Krakow
[3] PSI Center for Energy and Environmental Sciences, Paul Scherrer Institute, Forschungsstrasse 111, PSI, Villigen
[4] The Aleksander Krupkowski Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Krakow
来源：
Energy Storage Materials | 2024年 / 72卷
关键词：
Anode; Antimony; Antimony oxide chloride; Energy storage; Sodium-ion batteries;
D O I：
10.1016/j.ensm.2024.103780
中图分类号：
学科分类号：
摘要：
One of the most demanding goals in the field of Na-ion batteries is to find an appropriate anode material that delivers high capacities and can endure numerous cycles without structural degradation. Antimony stands out with a theoretical capacity of 660 mAh·g−1 and relatively high electrical conductivity. However, its challenges are pulverization and degradation of its microstructure due to volume changes. In this work, we used a solvothermal reaction to synthesize the composite material Sb/Sb4O5Cl2/C, which is made of Sb with branch-shaped morphology and Sb4O5Cl2 with cuboids-shaped morphology. The mechanism of the (de)sodiation of the composite material was analyzed both through operando and ex-situ measurements: X-ray diffraction, Raman spectroscopy, X-ray absorption spectroscopy, scanning electron microscopy, dilatometry, and online electrochemical mass spectrometry. The results show great mechanical integrity of the electrode, ensured by a lot of space for volume changes in the branch-shaped microstructure, buffered expansion/contraction by the amorphous matrix (sodiated Sb4O5Cl2), and high electronic conductivity, thanks to carbon. The microstructural features and the multistep (de)sodiation mechanism of the Sb/Sb4O5Cl2/C composite result in excellent cycling stabilities. © 2024
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