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解锁pH-通用电荷储存:超出纳米孔径的电化学工程N-合石墨烯

Limin Wang¹, Zhenxiang Chen¹, Yongchun Liu¹

¹Guangxi Key Laboratory of Low Carbon Energy Materials, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China.

Journal of colloid and interface science

|August 20, 2025

概括

这项研究揭示了配合石墨烯 (N-doped graphene) 在不同pH值的超级电容器中如何起作用. 它确定了负责在酸性和性条件下存储电荷的特定功能组,澄清了超级电容机制.

科学领域:

材料科学
电化学
纳米技术

背景情况:

基于碳的超级电容器表现出很好的性能,但它们在不同pH值下的电荷-放电机制尚未完全理解.
在这些材料中,从复杂的多孔结构和离子通道中解脱电容效应是具有挑战性的.

研究的目的:

研究碳基材料的依赖pH的电荷放电机制.
开发一个模型系统来研究整个pH范围内的这些机制.

主要方法:

结构定义的,无纳米孔的N-合石墨烯 (ENG) 的电化学合成.
在现场减弱全反射红外光谱 (ATR-FTIR) 用于监测电化学活性.
理论计算以了解离子吸附亲和力.

主要成果:

在酸性介质中,基和基的活性很高,而在性介质中,基的活性较高.
在中性介质中可检测到的ATR-FTIR峰值.
理论计算证实了基和基对H+的强烈吸附,提高了酸性性能.

结论:

N-化石墨烯 (ENG) 作为一个强大的模型,用于在不同的pH环境中阐明超级电容机制.
根据溶液的酸性或性,该研究阐明了不同功能组在电荷储存中的不同作用.

关键词:

充电放电机制电化学合成在现场FTIR 用改成的石墨烯理论计算

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相关概念视频

pH

The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium...