在石墨烯上MoS2/SnS/CoS异构结构:格子封闭合成和增强储存
Ruyao Zhang1, Yan Dong1, Yu Su1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
Molecules (Basel, Switzerland)
|August 26, 2023
概括
研究人员开发了一种用于离子电池 (SIB) 的新型复合阳极材料,使用独特的格子封闭策略. 这种先进的纳米材料展示了卓越的容量和速度性能,为实际的SIB应用铺平了道路.
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
- 纳米技术纳米技术
背景情况:
- 离子电池 (SIB) 需要先进的阳极材料来实际储能.
- 目前的多元件纳米材料通常依赖于表面模板或封装策略.
- 开发高效的复合阳极对于SIB的发展至关重要.
研究的目的:
- 为SIBs合成一种新的异构多硫化物复合阳极.
- 研究纳米材料合成的格子封闭策略的有效性.
- 为了评估开发的阳极材料的电化学性能.
主要方法:
- 在石墨烯上制备了MoS2/SnS/CoS复合物,使用了CoMoSn层双氧化物 (CoMoSn-LDH) 前体.
- 在合成过程中采用了独特的格子封闭效应.
- 进行了电化学测试,以评估容量,速度性能和循环稳定性.
主要成果:
- 这种MoS2/SnS/CoS复合物在0.1Ag-1.1下100个循环后表现出627.6mAhg-1的高可逆容量.
- 观察到优异的速率能力,在1000个循环后在5.0A g-1.1下达到304.9mA hg-1.
- 性能超过单,双和混合硫化物对应物,归因于电容贡献和低电荷转移阻力.
结论:
- 基于前体的晶格封闭策略是有效的创建统一的复合阳极纳米材料.
- 开发的异构多硫化物复合材料显示了SIB中电化学能量存储的巨大潜力.
- 这种方法为设计下一代电池的先进阳极材料提供了可行的途径.
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