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来自生物质的碳硫混合物增强了电化学动力学,以实现高储存性能

Bin Cao¹, Shan Gao¹, Yu Ma¹

¹College of Materials Science and Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Journal of colloid and interface science

|February 3, 2024

概括

研究人员为高性能离子电池 (PIB) 开发了低成本的N-doped生物质衍生碳-硫混合体 (NBCSH). 这些材料具有出色的容量,稳定的循环和快速的电荷传输,为先进的能量存储铺平了道路.

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:

离子电池 (PIB) 是一个有前途的新兴技术.
高性能阳极材料对于GDP的发展至关重要.
现有的材料经常面临成本和全面的电化学性能方面的挑战.

研究的目的:

为PIBs开发具有成本效益和高性能的阳极材料.
调查N-doped生物质衍生碳硫混合体 (NBCSHs) 的潜力.
评估NBCSHs的电化学特性和储存机制.

主要方法:

咖啡粉和硫粉的共同碳化产生NBCSHs.
电化学评估包括容量,速率性能和可循环性测试.
密度函数理论 (DFT) 计算以了解吸附.
组装K离子电容器以评估实际设备性能.

主要成果:

NBCSHs,特别是NBCSH 1-3,表现出高可逆容量 (484.7 mAh g-1) 和优越的速率性能.
在0.5 A g-1下1000个周期后,NBCSH 1-3显示出极好的稳定性,没有容量色.
伪电容性主导的行为和快速充电转移被确定为关键性能驱动因素.
DFT的计算证实了由于S和N联合兴奋剂而增加的吸附.
组装的K离子电容表现出稳定的循环性和良好的速率性能.

结论:

低成本的NBCSH是用于先进的PIB的高效和可持续的阳极材料.
与碳 (CSC) 结合的单原子硫站点对于高容量至关重要.
伪容量性质和快速的动力学有助于卓越的电化学性能.
对于下一代离子储能系统而言,NBCSH显示出巨大的潜力.

关键词:

阳极是一种极.碳 - 硫混合动力是什么不同原子的兴奋剂.离子电容器的电容器是一种离子电容.离子储存器是一种离子储存器.

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