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Updated: Aug 19, 2025

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

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Published on: November 11, 2013

带有石墨正电极的高容量可充电/2电池

Guanzhou Zhu¹, Peng Liang¹, Cheng-Liang Huang^2,3

¹Department of Chemistry and Bio-X, Stanford University, Stanford, California94305, United States.

Journal of the American Chemical Society

|November 30, 2022

概括

这项研究引入了活性石墨作为/ (Li/Cl2) 电池的高容量正极. 激活材料具有出色的放电能力和循环稳定性,使用低成本的石墨材料进行先进的能量存储.

科学领域:

电化学
材料科学
能量储存

背景情况:

开发高容量,高能量密度的可充电电池对于消费电子产品,电动汽车和电网存储至关重要.
之前的研究表明,Na/Cl2和Li/Cl2电池使用具有高可逆容量的无形碳纳米圈 (aCNS).

研究的目的:

调查最初的低表面积石墨 (DGr) 作为/Cl2电池的正极材料的潜力.
通过二氧化碳激活来提高石墨的性能,并了解其电化学行为.

主要方法:

在1000°C时使用CO2激活DGr,以产生DGr_ac.
用DGr_ac作为正电极对/Cl2电池进行电化学测试.
现场拉曼光谱和X射线衍射 (XRD) 来分析电极演变.
质谱测试以检测Cl2的捕获.

主要成果:

活性石墨 (DGr_ac) 的初次放电容量达到约1910 mAh g-1,循环容量高达1200 mAh g-1.
电化学循环诱导石墨脱皮,为LiCl/Cl2氧化还原反应创造孔隙.
质谱测试证实了石墨电极中的Cl2捕获.

结论:

低成本的石墨材料在激活时可用于高容量的金属/Cl2电池.
石墨激活和现场孔隙生成是/Cl2系统高性能的关键.
这项工作为/2电池的操作机制提供了洞察力.

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