相关实验视频

Updated: Jun 14, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

三级惰性元素辅助兴奋剂:一种新的方法稳定4.7V LiCoO₂

Xiaolei Li¹, Xiaolong Zhu¹, Yihao Zhang¹

¹Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.

Advanced materials (Deerfield Beach, Fla.)

|June 13, 2025

概括

这项研究引入了一种使用,和的新型联合兴奋剂策略,以提高高压电池的氧化 (LCO) 阴极材料的结构稳定性. 这种方法在先进的电池应用中显著改善容量保留和循环性能.

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
电池技术电池技术

背景情况:

氧化 (LCO) 是便携式电子设备中的一个关键阴极材料,因为它的能量密度很高.
为了更高的容量,增加电池电压受到LCO结构性降解的限制.

研究的目的:

在高电压下制定稳定LCO结构的策略.
为了提高下一代电池的LCO阴极材料的性能和寿命.

主要方法:

与三元惰性元素 (Mg 和 Ni 在 Li 位点,Al 在 Co 位点) 配合激活 LCO.
研究Al,Mg和Ni对结构稳定性和电化学性能的协同作用.
在高电压 (4.6V和4.7V) 进行长期循环测试.

主要成果:

和的注稳定了在化状态下的分层结构,并抑制了氧气损失.
doping 防止了 Co-O 八面体的扭曲,并稳定了 Co 层.
与Al,Mg和Ni的联合兴奋剂抑制相位过渡并减少内部压力,从而提高了骑自行车的稳定性.
与Al-Mg-Ni联合合的LCO在4.6V的1500个循环后实现了221mAhg-1和65.5%的保留率.
在4.7V的电压下,它在600个循环后提供了225.8 mAh g-1和58.6%的保留率.

结论:

三级惰性元素联合兴奋剂是稳定高压LCO的有效策略.
这种方法为改进其他分层氧化物材料的先进电池应用提供了一条途径.

关键词:

液态CO2O2的使用情况.阴极材料的材料是正极材料.高电压的高电压的高电压惰性元素协同兴奋剂的使用.离子电池的离子电池结构稳定性结构稳定性

更多相关视频

Blue-hazard-free Candlelight OLED

Blue-hazard-free Candlelight OLED

Published on: March 19, 2017

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

相关概念视频

Ionic Bonding and Electron Transfer

Ionic Bonding and Electron Transfer

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.

Covalent Bonding and Lewis Structures

Covalent Bonding and Lewis Structures

Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.

Biasing of Metal-Semiconductor Junctions

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

Non-ohmic Devices

Non-ohmic Devices

In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

MOSFET: Enhancement Mode

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...