由元素兴奋剂驱动的带调节向稳定的4.5V离子层氧化物转移
Keyu Pan1, Hailong Yang1, Xiufang Zheng1
1Center of Advanced Electrochemical Energy, Institute of Advanced Interdisciplinary Studies, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
Nanoscale
|December 24, 2025
概括
单元素兴奋剂增强了离子电池的P2型分层氧化物阴极. 这种方法提高了结构稳定性和容量保留,使高压应用成为可能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 由于其高容量和稳定性,P2型层氧化物对离子电池 (SIB) 是有前途的.
- 在SIB中,高工作电压受到相位转换和氧气释放的限制.
- 开发稳定的高压阴极对于先进的SIB技术至关重要.
研究的目的:
- 研究一种简单,成本效益高的单元兴奋剂策略,用于P2型分层氧化物阴极.
- 提高高压SIBs的阴极材料的电子和结构性质.
- 为优化阴极设计阐明兴奋剂机制和结构-活性关系.
主要方法:
- 单元注被用来修改阴极材料的特性.
- 描述技术被用来分析电子结构,粘合和结构稳定性.
- 进行了电化学循环,以评估性能和容量保留.
主要成果:
- 兴奋剂改变了氧 p 波段中心,改变了过渡金属协调.
- 增强的TM-O结合和稳定的八面体框架抑制了Jahn-Teller扭曲.
- 在300个高压循环后,容量保留显著改善,从23.4%提高到69.3%.
结论:
- 单元兴奋剂是一种有效的策略,可以稳定高压P2型分层氧化物阴极.
- 兴奋剂机制增强了阳离子氧化还原反应的结构完整性和可逆性.
- 这项研究为设计先进的离子电池阴极提供了洞察力.
相关概念视频
Energy Bands in Solids
1.8K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
1.8K
Biasing of P-N Junction
1.7K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
1.7K
Ionic Bonding and Electron Transfer
48.5K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
48.5K
MOS Capacitor
1.4K
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...
1.4K


