相关实验视频

Updated: Jun 2, 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

一个没有相位过渡的,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

Xiao-Hui Wu¹, Wei-Jun Jiang¹, Chen Dai¹

¹College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Normal University, Fuzhou, 350117, China.

Advanced materials (Deerfield Beach, Fla.)

|January 15, 2025

概括

中等工程增强了离子电池阴极. 一种新型材料 (ME-NVP) 克服了导电性和相位过渡问题,使高电压,稳定性和速度能力成为先进的能量存储.

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:

离子电池 (SIB) 对电网规模的储能充满希望.
Na3V2(PO4)3 (NVP) 是一个潜在的阴极,但其电导性差,相位过渡不佳.
这些限制阻碍了其在SIB中的实际应用.

研究的目的:

通过开发一种中材料 (ME-NVP) 来解决NVP的局限性.
研究中工程对电化学性能和结构稳定性的影响.
为了提高SIBs的聚离子阴极的电压,速率能力和循环寿命.

主要方法:

一种新型的中材料的合成:Na3.2V1.1Ti0.2Al0.2Cr0.2Mn0.2Ni0.1(PO4)3 (ME-NVP).
进行全面的现场和现场表征,以研究阶段过渡和结构变化.
电化学测试,包括速度能力和长期循环性能.
动力学分析和理论计算以了解Na+扩散和结合能.

主要成果:

ME-NVP表现出一种无相变的反应机制,在3.4V和4.0V时有两个可逆平原.
它显示在Na+插入/提取过程中体积变化最小 (2%).
获得了卓越的Na+扩散动力学和50C的67mAhg-1的显著速率能力.
长期循环超过10,000个循环,容量保留81.3%,显示出超稳定的性能.

结论:

中等工程有效地抑制相位过渡,并改善聚离子阴极的导电性.
ME-NVP在SIB的电压,循环稳定性和速率能力方面取得了显著的进步.
这种方法为开发下一代储能系统的高性能阴极材料提供了一个有前途的战略.

关键词:

阴极是指一个阴极.中等的.没有阶段过渡的自由过渡.离子电池离子电池的酸和酸.

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

Fabrication of VB2/Air Cells for Electrochemical Testing

Fabrication of VB2/Air Cells for Electrochemical Testing

Published on: August 5, 2013

相关概念视频

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...

Phosphate Buffer

Phosphate Buffer

The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...