生物囊离子电池阳极用于有效抑制体积膨胀
Zhenhai Gao1,2, Shun Rao1,2, Junjun Wang3,4
1National Key Laboratory of Automotive Chassis Integration and Bionics, Jilin University, Changchun, 130022, China.
ChemSusChem
|June 8, 2024
概括
研究人员开发了生物Fe3O4@PMMA囊,以改善离子电池阳极. 这些囊增强了循环稳定性和容量保留,解决了磁石阳极中的体积膨胀问题,以提高电池性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 磁铁 (Fe3O4) 是离子电池 (LIB) 的一个有前途的阳极材料,因为它具有很高的理论容量和丰富性.
- 然而,Fe3O4在化过程中会发生显著的体积变化,导致循环稳定性和速率性能差.
- 解决这种体积扩张对于实际的LIB应用至关重要.
研究的目的:
- 设计和合成新的Fe3O4@PMMA多核囊作为LIBs的阳极材料.
- 为了研究这些生物囊的电化学性能和循环稳定性.
- 为评估实时电池容量修复提出一种新的评估方法.
主要方法:
- 微乳液聚合被用来制造Fe3O4@PMMA多核囊.
- 进行了电化学测试,包括循环电压测量和静电充放电循环.
- 用LiNi0.8Co0.1Mn0.1O2阴极和Fe3O4@PMMA阳极组装袋细胞进行了全面评估.
主要成果:
- 在300个循环后,Fe3O4@PMMA阳极在0.1°C下显示出858.0mAhg-1的高可逆特异容量.
- 观察到卓越的循环稳定性,在450个循环后在0.5°C下容量为450.99mAhg-1.
- 在450个循环后,LiNi0.8Co0.1Mn0.1O2/Fe3O4@PMMA袋式电池保持了95.5%的容量,具有惊人的93.4%容量修复率.
结论:
- Fe3O4@PMMA生物囊有效地减轻磁铁阳极中的体积膨胀问题.
- 开发的阳极材料表现出卓越的电化学性能,包括高容量和出色的循环稳定性.
- 这种创新的生物囊设计为推进工业LIB中的Fe3O4阳极应用提供了有前途的解决方案.
相关概念视频
03:12Batteries and Fuel Cells
27.3K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.3K
01:30Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.2K
01:25MOS Capacitor
765
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
765