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通过合理修改粉前体来实现硬碳的增强储存性能

Lihong Zhang¹, Nuo Chen¹, Shangjun Zhang¹

¹Institute of Soft-matter and Advanced Functional Materials, Gansu Province Carbon New Material Industry Technology Center, School of Materials and Energy, Lanzhou University, Lanzhou 730000, China.

ACS applied materials & interfaces

|February 25, 2025

概括

酸改性玉米粉为离子电池创建了先进的硬碳阳极. 这种化学修饰提高了电化学性能,为储能应用提供了更好的容量和循环寿命.

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:

粉基组的化学修饰对于优化离子电池 (SIB) 中硬碳 (HC) 阳极性能至关重要.
控制HC的复杂微观结构是具有挑战性的,但对于设计先进的储存材料至关重要.

研究的目的:

调查使用二酸 (DAP) 作为玉米粉的交联剂,以修改HC微结构.
通过控制孔隙结构和层间间距来提高SIB的HC阳极的电化学性能.

主要方法:

玉米粉经过化学修饰,使用酸 (DAP) 作为交联剂.
改性粉被烧解以产生硬碳 (HC) 材料.
修改HC (HC-10) 的电化学性能在SIBs中进行了评估.

主要成果:

与未经修改的HC相比,优化的HC-10表现出优越的电化学性能.
在0.03 A g-1下,HC-10实现了344.16 mAh的高可逆容量.
它表现出了出色的速率能力 (134.73 mAh g-1 在0.3 A g-1) 和周期稳定性 (98.5%在500个周期后保持).

结论:

DAP修改有效地平衡了HC中的孔隙结构和层间距,从而提高了的储存.
在热解过程中,DAP起到催化剂的作用,影响碳层的生长,缺陷的形成和孔隙结构.
这项研究为SIBs开发高性能生物质衍生阳极材料提供了有价值的方法.

关键词:

在 DAP DAP 中,您可以使用 DAP.硬碳是一种硬的碳.高可逆容量的高可逆容量修改的意思是改变的意思.这是一种粉,粉.

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