阳极
材料科学
复合数
介孔材料
化学工程
储能
锂(药物)
合金
缓冲器(光纤)
复合材料
纳米技术
电极
催化作用
化学
电气工程
生物化学
物理
物理化学
工程类
医学
功率(物理)
量子力学
内分泌学
作者
Jeong-Eun Park,Minjun Kim,Minsu Choi,Minkyeong Ku,Dayoung Kam,Sang‐Ok Kim,Wonchang Choi
标识
DOI:10.1016/j.jpowsour.2023.232908
摘要
Due to vast sodium reserves, sodium-ion batteries (SIBs) are more cost-efficient to produce than lithium-ion batteries. Therefore, they are actively researched as next-generation energy storage materials. Antimony is a promising anode material for SIB owing to its high theoretical capacity (660 mA h g−1) and an appropriate sodiation voltage. However, due to the rapid volume change during sodium intercalation and deintercalation, cycling stability is poor, presenting a significant obstacle to the practical application of SIBs. Alleviating the Sb volume expansion throughout the charging and discharging processes is the key to the practical implementation of Sb-based anodes. Herein, Sb/C–SiOC composites are prepared using the hydrogen bonding-based adsorption properties of metal-organic frameworks (MOFs). The final product, the Sb/C–SiOC composites, exhibited significantly improved cycle performance, such as maintaining the initial capacity after 200 cycles by the SiOC matrix acting as a conductive buffer. Additionally, the presence of MOF-derived mesoporous carbon and SiOC contributed to the improved rate performance. The hydrogen bond-based adsorption properties of the MOFs used in this study can be effectively applied to uniformly introduce a matrix or coating layer that relieves the volume expansion of high-capacity composite anodes, making it an effective strategy for developing alloy-based energy storage materials.
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