蜂状的微孔碳封闭作为一个Zn-Se电池阴极材料
Zehong Li1, Sheng Ouyang1, Zengrong Mao1
1School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, Guangdong, China. shaolianyi@gdut.edu.cn.
Nanoscale
|October 28, 2025
概括
微孔碳矩阵有效地将 (Se) 限制在离子电池中,防止体积膨胀并提高循环稳定性. 这一策略提高了实际应用的电池性能和寿命.
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:
- (Se) 因其高容量和导电性而显示出作为离子电池 (ZIB) 阴极的潜力.
- 隔离阴极材料在循环过程中遭受大量体积膨胀,导致降解和不稳定.
研究的目的:
- 制定一种策略,以减轻ZIB中的正极体的体积膨胀.
- 通过材料设计,提高基于Se的ZIB的速度能力和循环稳定性.
主要方法:
- 在微孔碳矩阵 (Se@C) 中封闭的的制造.
- 在ZIB中测试Se@C阴极的电化学性能,包括容量,速率能力和循环稳定性.
- 在现场电化学阻抗光谱 (EIS) 和放松时间分布 (DRT) 分析以调查动力学.
主要成果:
- 优化的Se@C阴极在0.1 A g-1下提供了373.36 mAh的高初始可逆容量.
- Se@C阴极表现出稳定的循环性能,在2Ag-1的500个循环后保持90.23mAhg-1.
- 现场EIS和DRT分析证实了内部阻力降低和增强的离子/电子传输动力学.
结论:
- 在微孔碳中限制有效抑制体积膨胀,提高ZIB性能.
- Se@C复合材料表现出优越的电化学性能,包括高容量和出色的循环稳定性.
- 该战略为开发高性能ZIB的先进阴极材料提供了一个有前途的途径.
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