莫调节单临二氧化的结构,促进水性离子储存,用于高性能超级电容器
Zhenhua Zhou1, Tianming Lv1, Zhanming Gao1
1State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, PR China.
Journal of colloid and interface science
|July 28, 2024
概括
用添加的二氧化 (Mo-doped VO2 ((B)) 提高了离子超级电容的性能. 这种兴奋剂策略显著提高了先进能源设备的能量存储能力和循环稳定性.
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:
- 离子超级电容器 (NH4+-SCs) 正在引起人们对储能应用的关注.
- 基于的材料对NH4+存储有希望,但作为阳极材料的单临二氧化 (VO2(B)) 尚未得到充分探索.
- 调节VO2 (B) 的电子结构对于提高其NH4+存储能力至关重要.
研究的目的:
- 设计和合成化VO2 (Mo-doped VO2 (B)) 以提高其离子储存性能.
- 调查兴奋剂对VO2的晶体结构和电化学性质的影响.
- 评估Mo-doped VO2 (((B) 作为超级电容器的阳极材料的潜力.
主要方法:
- 合成具有不同Mo度的Mo-dopedVO2 (B) 材料.
- 合成材料的晶体结构和电子性能的表征.
- 在NH4+-SC中作为阳极的Mo-doped VO2 (((B) 的电化学测试,包括循环电压测量,静电电荷放电和循环寿命测试.
- 使用Mo-doped VO2 (B) 和活性碳组装和测试混合超级电容器 (HSC).
主要成果:
- 与2%的Mo兴奋剂合的VO2 (B) 与原始VO2 (B) 相比,表现出优越的电化学特性.
- 优化的Mo-doped VO2 ((B) 在0.1 A g-1下达到1403 F g-1 (390 mAh g-1) 的特定电容,并在5000个循环后保持约98%的电容.
- 混合超级电容器的能量密度为38.6 Wh kg-1在功率密度为208.3 W kg-1.1时.
结论:
- 兴奋剂是一种有效的策略,可以提高VO2的离子储存性能.
- 引入Mo原子调节了晶体结构和缺陷,从而改善了电化学性能.
- 化VO2 (B) 显示出作为离子超级电容器的高性能阳极材料的巨大潜力.
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