层状脊柱异质结构和氧气空隙使丰富的阴极具有优越的电化学性能
Pengkun Yang1, Long Shang1, Huimin Wang1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Advanced Chemical Power Sources, College of Chemistry, Nankai University, Tianjin, 300071, P.R. China.
Angewandte Chemie (International ed. in English)
|May 25, 2025
概括
富的基氧化物 (LRMOs) 对电池有希望,但表面问题限制了它们的使用. 一种新的酸处理产生了保护层,大大提高了电池的性能和稳定性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 富含的基氧化物 (LRMO) 是高能离子/金属电池的有前途的阴极材料,因为它们具有高容量,高电压和低成本.
- 商业化受到表面退化,氧气释放,低初始库伦比效率 (ICE) 和快速容量衰减的阻碍.
研究的目的:
- 为LRMO开发表面处理策略,以提高结构稳定性和电化学性能.
- 研究多功能接口层的形成及其对阳离子氧氧氧化还原反应的影响.
主要方法:
- 使用易于用酸辅助的表面处理方法,在LRMO上创建接口层.
- 接口层的特点是分层的脊柱异质结构和氧气空缺.
- 评估了电化学性能,包括ICE,容量保留和电压衰减.
主要成果:
- 经过处理的LRMO表现出88.3%的改善ICE.
- 在150个循环后,在1C时实现了87.9%的高容量保留.
- 观察到低电压衰变比为每周期1.26mV,表明稳定性得到增强.
结论:
- 用酸辅助的表面处理有效地构建多功能接口层,抑制氧气释放和相变.
- 这种接口工程方法显著提高了LRMO的综合电化学性能.
- 该研究为推进下一代电池的LRMO阴极材料提供了一种新的策略.
相关概念视频
Batteries and Fuel Cells
28.0K
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...
28.0K
Electrodeposition
735
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
735
Formation of Complex Ions
24.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.0K


