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一种高容量的p型有机阴极材料,用于水性电池
Yan Zhang1, Min Li1, Zongyang Li1
1Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical Engineering, Shanghai University of Electric Power, 200090, Shanghai, China.
Angewandte Chemie (International ed. in English)
|September 2, 2024
概括
一种新的p型有机阴极材料5,12-dihydro-5,6,11,12-tetraazatetracene (DHTAT) 为水性电池 (AZB) 提供了高容量和稳定性. 即使在低温下,DHTAT也表现出极好的性能.
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:
- 由于高的氧化还原潜力和动力学,P型有机阴极材料对水性电池 (AZB) 是有前途的.
- 现有的有机阴极容量有限的原因是活性功能组含量低.
研究的目的:
- 为AZBs开发一种高容量的p型有机阴极材料.
- 调查新材料的电荷存储机制和性能.
主要方法:
- 5,12-二-5,6,11,12-四甲烯 (DHTAT) 的合成和表征.
- 在AZB中对DHTAT进行电化学测试,包括容量,循环稳定性和低温性能.
- 计算分析以了解电荷存储机制.
主要成果:
- 在50 mA g-1下,DHTAT具有224 mAh g-1的高容量.
- 该材料表现出极好的循环稳定性,在5000次循环后在5Ag-1下保持73%的容量.
- DHTAT在低温下表现出强的性能,在-40°C下稳定循环4000个周期.
结论:
- DHTAT是一种用于AZBs的高容量,稳定的p型有机阴极材料.
- 电荷储存机制涉及ClO4-对-NH-组的吸附/脱附,这是DHTAT的高功能组比率所促进的.
- 对于低温电池应用,DHTAT 是一个有竞争力的候选.
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