通过硫电池的酸性功能化,提高了多壁碳纳米管的主机性能
Gwang-Hun Kim1, Asif Raza1, You-Jin Lee1
1Next-Generation Battery Research Center, Korea Electrotechnology Research Institute, Changwon, 51543, South Korea.
Heliyon
|September 3, 2024
概括
碳纳米管 (CNT) 的酸性功能化改善了它们在硫 (Li-S) 电池中的分散性. 这种方法通过减少聚硫化物穿来提高电化学性能和商业可行性.
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:
- 碳纳米管 (CNT) 由于其独特的结构,是-硫 (Li-S) 电池的有希望的阴极材料.
- 传统的CNT在电极中分散不良,限制了硫载荷,导致聚合和两极分化.
- 聚硫化物穿是Li-S电池性能的一个主要挑战.
研究的目的:
- 为了解决 Li-S 电池阴极中 CNTs 的差散问题.
- 为了减轻聚硫化物穿和提高电化学性能.
- 作为一个实际的解决方案,提出CNT的酸性功能化.
主要方法:
- 使用硫酸,酸和两者的混合物进行多壁CNT的氧化功能化.
- 使用功能化的 CNTs 准备正极.
- 准备好的Li-S电池的电化学性能测试.
主要成果:
- 酸性功能化显著改善了阴极结构中的CNT分散.
- 用硫酸和酸混合物处理的CNTs制备的正极表现出色.
- 在100个循环后达到99%的高库伦比效率和743mAhg-1.1的放电容量.
结论:
- CNT的酸性功能化是一种有效的策略,可以克服Li-S电池阴极中的分散问题.
- 该方法成功地减轻了聚硫化物穿,从而提高了电池性能.
- 这种方法对先进的硫电池的商业可行性有希望.
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