相互连接的CoNi-Se空心片通过减少的氧化石墨烯板作为混合超级电容器的阴极材料
Eslam Aboelazm1,2, Cheng Seong Khe1,2, Kwok Feng Chong3
1Department of Fundamental and Applied Sciences, Universiti Teknologi PETRONAS, Seri Iskandar, Perak 32610, Malaysia.
ACS applied materials & interfaces
|March 12, 2024
概括
这项研究开发了一种新的3D空心-化 (CoNi-Se) 结构在减少的石墨烯氧化物 (rGO) 上,用于优质的能量存储. CoNi-Se/rGO复合材料在先进的电池应用中表现出增强的特定容量和长期稳定性.
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:
- 高能量密度和循环稳定性对于储能设备至关重要.
- 过渡金属化物 (TMSe) 由于其活性,导电性和稳定性而具有潜力.
- 创新的结构设计是优化材料性能的关键.
研究的目的:
- 为了研究空心二元金属化物 (CoNi-Se) 结构在减少的氧化石墨烯 (rGO) 上的电化学性能.
- 开发一种新的3D复合材料 (CoNi-Se/rGO),用于先进的储能应用.
- 为了评估合成材料的特定电容,速率能力和循环稳定性.
主要方法:
- 在3DrGO架构上合成空洞的CoNi-Se结构.
- 电化学分析包括特定电容和速率能力测量.
- 制造和测试两电极硬币电池系统,以评估能量密度和长期循环性能.
主要成果:
- CoNi-Se/rGO复合物表现出 2957 Fg-1 的特定电容,在 1 A g-1 时优于裸体 CoNi-Se (2149 Fg-1).
- 观察到特殊的高速率能力,在10 A g-1时保持83%的电容.
- 硬币电池设备实现了73Wh kg-1的能量密度,并在20,000个循环后保持了90.4%的电容.
结论:
- 与赤裸的CoNi-Se相比,3D空洞的CoNi-Se/rGO复合材料表现出优越的电化学性能.
- 相互连接的rGO网络充当一个高效的电流收集器,增强氧化还原活性.
- CoNi-Se/rGO 是一种有前途的电极材料,用于高性能,持久的储能器件.
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