阳极
材料科学
复合数
静电纺丝
锂(药物)
煅烧
纳米纤维
化学工程
多孔性
扩散
电流密度
碱金属
碳纳米纤维
纳米技术
复合材料
电极
碳纳米管
聚合物
化学
催化作用
有机化学
医学
物理
物理化学
量子力学
工程类
热力学
内分泌学
作者
Chu Shi,Zhiwen Long,Caiqin Wu,Han Dai,Zhengchun Li,Hui Qiao,Ke Liu,Qi Hua Fan,Keliang Wang
出处
期刊:Small
[Wiley]
日期:2023-07-30
卷期号:19 (48)
被引量:10
标识
DOI:10.1002/smll.202303802
摘要
The volume expansion of CoFe2 O4 anode poses a significant challenge in the commercial application of lithium/sodium-ion batteries (LIBs/SIBs). However, metal-organic-frameworks (MOF) offer superior construction of heterostructures with refined interfacial interactions and lower ion diffusion barriers in Li/Na storage. In this study, the CoFe2 O4 @carbon nanofibers derived from MOF are produced through electrospinning, in situ growth followed by calcination, which are then confined within an MXene-confined MOF-derived porous CoFe2 O4 @carbon composite architecture under alkali treatment. The CoFe2 O4 nanofibers anchor on the alkalized MXene that is decorated with the NaOH solution to form a multi-pleated structure. The sandwich-like structure of the composite effectively alleviates the volume expansion and shortens the Li/Na-ion diffusion path, which displays high capacity and outstanding rate performance as anode materials for LIBs/SIBs. As a consequence, the obtained CoFe2 O4 @carbon@alkalized MXene composite anode shows satisfied rate performance at current density of 10 A g-1 for LIBs (318 mAh·g-1 ) and 5 A g-1 for SIBs (149 mAh g-1 ). The excellent cycling performance is further demonstrated at a high current density, where it maintains a discharge capacity of 807 mAh g-1 at 2 A g-1 after 400 cycles for LIBs and 130 mAh g-1 at 1 A g-1 even after 1000 cycles for SIBs.
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