工程异构结构的Fe-Co-P阵列为坚固的储存
Zidi Xiao1, Lin Gao1,2, Shaohui Li3
1Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China.
Materials (Basel, Switzerland)
|April 13, 2024
概括
新型异构的Fe-Co-P阵列通过减轻体积变化和改善电荷转移,为离子电池 (SIB) 提供了解决方案. 这一进步提高了电池的性能和稳定性,用于实际应用.
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:
- 过渡金属化物对离子电池 (SIB) 是有前途的,因为其理论容量很高.
- 在循环过程中化物的体积波动导致容量下降,限制了SIB应用.
研究的目的:
- 构建新的异构结构Fe-Co-P (FeP/Co2P) 阵列,以提高SIB性能.
- 为了解决由金属化物体体积变化引起的容量衰变问题.
主要方法:
- 制造自支持的异构结构的Fe-Co-P阵列.
- 在SIB中制造的阵列的电化学性能测试.
- 密度函数理论 (DFT) 计算用于研究电子结构和离子传输.
主要成果:
- 异构结构有效地减轻化/脱过程中的体积变化.
- DFT的计算证实了异构接口内置的电场,加速了电荷转移和Na+离子扩散.
- 与单个FeP和Co2P相比,FeP/Co2P异构表现出更高的电导率.
- 经过300个循环后,在0.2A g-1下表现出卓越的性能和高可逆容量 (634 mAh g-1在0.2A g-1和239 mAh g-1在1A g-1).
结论:
- 不同结构的Fe-Co-P阵列为高性能SIB提供了有前途的阳极材料.
- 独特的异构结构设计增强了电化学稳定性和离子传输.
- 这项工作提供了一种可行的策略,以克服传统金属化物在储能设备中的局限性.
更多相关视频
10:31Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
Published on: December 6, 2015
28.1K
09:18Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
11.4K
相关概念视频
03:06Alkali Metals
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
02:42Ionic Crystal Structures
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
01:24Electrochemical Systems
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...