阳极
锂(药物)
材料科学
离子
化学工程
锂离子电池的纳米结构
电极
化学
有机化学
物理化学
工程类
医学
内分泌学
作者
Wenwen Deng,Shaocong Ni,Naiqi Hu,Ying Zhou,Zhong Jin
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2024-03-13
被引量:1
标识
DOI:10.1021/acsanm.3c06244
摘要
Silicon oxide (SiOx) has been widely studied due to its ultrahigh theoretical specific capacity for lithium storage. However, its inherent low electronic conductivity and large volume change before and after lithium insertion have limited its commercialization. To address this issue, we report the synthesis of SiOx@ZrO2@C ternary composite nanospheres by convenient and scalable wet chemistry and sintering processes. In the unique structure of 3D porous SiOx@ZrO2@C nanospheres, zirconium oxide (ZrO2) supplies high structural stability, while the amorphous carbon (C) layer helps to form a stable solid–electrolyte interface, suppress volume expansion, and greatly improve the conductivity. Electrochemical measurements demonstrate that the SiOx@ZrO2@C nanospheres exhibit a capacity retention of 72.2% after 500 cycles at 500 mA g–1. At a high current density of 800 mA g–1, the SiOx@ZrO2@C nanospheres can still deliver a capacity of 529.1 mAh g–1. This work provides a promising mass-scale synthesis method for producing SiOx composites and introduces a high-performance anode material for lithium-ion batteries.
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