相关实验视频

Updated: Jun 26, 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

新型双调节碳材料作为离子电池的高性能阳极

Xinran He^1,2,3, Xiaolin Xiang^1,2,3, Piao Pan¹

¹Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, People's Republic of China.

|May 10, 2024

概括

二元调节的碳材料 (Si/BPC) 克服了电池的阳极限制. 这种新型材料显示出增强的容量和稳定性,为实用的阳极铺平了道路.

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:

阳极具有高的理论容量,但由于体积膨胀,不稳定的固体电解质介相 (SEI) 和电导率差,阻碍了实际的电池应用.
现有的解决方案往往涉及复杂的合成或未能完全解决固有的缺点.

研究的目的:

开发新的二元调节碳材料 (Si/BPC),以解决阳极的局限性.
系统地研究二元兴奋剂 (和) 对-碳复合材料的形态,结构和电化学性能的影响.

主要方法:

/BPC合成的Sol-gel程序与单碳化相结合.
系统的分析技术,以检查材料性能和电化学性能.
电化学测试包括循环稳定性,速率能力和阻抗光谱.

主要成果:

优化的Si/BPC复合材料在1000mAg-1下经过180个循环后表现出1021.6mAhg-1的高排放特异容量,并具有99.27%的库伦比效率.
观察到出色的速率性能,容量为1003.2 mAh g^{-1 在5000 mA g^{-1 和恢复到2838.6 mAh g^{-1 在200 mA g^-1.}}}
与和元素的联合兴奋剂协同改善了离子扩散动力学,将电化学阻抗降低到45.75 Ω,并为Li+存储创造了更多活跃的地点.

结论:

二元调节的碳材料 (Si/BPC) 有效地减轻了与阳极相关的挑战.
B和P联合兴奋剂的协同效应显著增强了电化学特性,包括离子扩散和电荷转移.
这项研究为开发高级离子电池的高性能基阳极提出了有前途的战略.

关键词:

碳涂层是一种碳涂层.扩散扩散是一种扩散.不同原子的兴奋剂.离子电池离子电池阳极是一种阳极.

更多相关视频

Construction and Testing of Coin Cells of Lithium Ion Batteries

Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

Published on: February 1, 2016

相关概念视频

Types of Semiconductors

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...

Batteries and Fuel Cells

Batteries and Fuel Cells

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...

Network Covalent Solids

Network Covalent Solids

Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...