煤炭衍生二维MNb2O6 (M = Mn,Fe,Co) /C混合体,具有优越的储存性能
Yang Zhang1, Ziyun Ma1, Yanjun Cai1
1College of Chemistry and Chemical Engineering, Xinjiang Key Laboratory of Energy Storage and Photoelectrocatalytic Materials, Xinjiang Normal University, Urumqi, 830054, Xinjiang, China. zyangxy@163.com.
新的2D M-Nb-O/碳纳米混合体是使用煤炭合成的. 这些材料对高性能离子电池具有出色的稳定性和性能,为储能应用提供了有前途的替代方案.
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:
- 高性能离子电池 (LIB) 需要具有增强动力学,安全性和离子 (去) 间隔的电极材料.
- 新型纳米结构材料的合理设计是克服当前LIB限制的关键.
研究的目的:
- 为LIB应用合成和表征二维 (2D) M-Nb2O6/C纳米混合体 (M = Mn,Fe,Co).
- 研究这些新型混合材料的电化学特性和结构完整性.
主要方法:
- 使用海山煤作为碳源和结构载体的盐辅助合成.
- 合成的2D纳米混合体 (FeNb2O6 / C和CoNb2O6 / C) 的表征.
- 电化学测试,包括循环稳定性,速率能力和充满电池性能.
主要成果:
- FeNb2O6/C (FeNO/C) 纳米薄膜表现出极好的循环稳定性 (632.1 mAh g-1 经过 600 个循环) 和 Li+ 扩散.
- CoNb2O6 / C (CoNO / C) 通过无形相转换表现出增强的电化学行为.
- 这款LiFePO4FeNO/C全电池表现良好.
结论:
- 基于二维M-Nb-O/煤的碳混合纳米结构的合理设计产生了具有卓越结构稳定性和完整性的材料.
- 这些混合纳米结构为开发高性能LIB的先进电极材料提供了宝贵的参考.
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