碳封闭的纳米管阴极使稳定的高容量离子电池成为可能
Ruiyan Liu1, Xi Chen1, Shiru Min1
1School of Fiber Engineering and Equipment Technology, Jiangnan University, Wuxi, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|February 11, 2026
概括
碳涂层纳米管 (TeNT@CT) 通过提高导电性和抑制材料损失来增强离子电池 (AIB). 这种新的正极材料表现出卓越的稳定性和容量保留,用于先进的能量存储.
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 (AIB) 对储能充满希望.
- (Te) 是一种潜在的正极材料,但其导电性较差,并有穿效应.
- 可溶性类物种加剧了AIB中的性能限制.
研究的目的:
- 为AIBs开发一种稳定,高性能的正极材料.
- 为了克服作为正极材料的局限性.
- 研究碳涂层和纳米结构设计的协同效应.
主要方法:
- 碳涂层纳米管 (TeNT@CT) 的合成,采用混合溶热-水热方法,然后进行碳化.
- 对于特定的表面积和多孔结构,TeNT@CT的表征.
- 在AIB中测试TeNT@CT的电化学性能.
主要成果:
- TeNT@CT表现出高特异性表面积 (35.1 m2 g-1) 和层次性的多孔结构.
- TeNT@CT 阴极在0.1 A g-1 时提供309 mAh g-1 的初始放电容量,并具有高库伦比效率.
- 显著的循环稳定性,93 mAh g-1 容量在 1500 个循环以 2 A g-1 (86.1%的保留率) 和>97%的库伦比效率后保留了.
结论:
- 碳外和多孔碳层的协同封闭效应有效地抑制了穿效应.
- TeNT@CT展示了卓越的电化学性能,突出了它对AIBs的潜力.
- 这一战略为开发用于多价离子电池的先进基阴极提供了可行的途径.
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