调节阴极表面的基化学使得的储存能力更高
Qingfeng Fu1, Chi Peng1, Wang Zhou1
1College of Materials Science and Engineering, Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China.
概括
一种新型的纤维素衍生化酸 (KVPO4F) 阴极提供了增强的离子电池性能. 这种自支持电极设计可以提高能量密度和循环稳定性,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:
- 二酸 (KVPO4F) 由于高电压和容量,对离子电池具有前景.
- 电流电极设计往往遭受不活跃的结合剂和过量的电流收集器,限制性能和能量密度.
研究的目的:
- 为KVPO4F阴极开发一种可扩展和具有成本效益的自支电极.
- 研究纤维素在增强电极结构和电化学性能方面的作用.
主要方法:
- 通过可扩展的方法合成了一种来自纤维素的KVPO4F自支持电极.
- 描述了电极的结构,包括其多孔框架,灵活性和表面基化学.
- 评估了离子电池中电极的电化学性能.
主要成果:
- 来自纤维素的电极表现出独特的3D多孔和导电框架,增强了灵活性和稳定性.
- 该材料表现出高速率的性能,容量保持率为53.0%,从0.2C到10C.
- 实现了令人印象深刻的循环稳定性,在1000个循环中保持74.9%的容量,在5C时保持74.9%.
结论:
- 纤维素作为基质,粘合剂和孔形成剂,改善K离子迁移和整体电极完整性.
- 开发的电极设计和表面工程策略显著提高了离子电池的性能.
- 这项工作提供了对储存机制的见解,并指导了未来的储能系统电极设计.
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