π-π 堆叠辅助自组装 制造高度统一的 PANI@RGO 阴极 转向高性能水性离子电池
Si Liu1,2, Zhifeng Lin1, Zhihan Zheng1
1School of Electronic and Information Engineering, School of Environmental and Chemical Engineering, Foshan University, Foshan, P. R. China.
我们开发了一种新的溶剂介导自组装方法,用于为水性离子电池 (AZIB) 制造3D多孔聚氨酸/减少氧化石墨烯复合凝. 这种方法提高了电极性能,使其具有高容量和出色的低温和速率能力.
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:
- 聚氨酸 (PANI) 是水性离子电池 (AZIB) 的有前途的阴极材料,因为它具有快速的氧化还原动力学和环保性.
- 然而,PANI的实际应用受到形态聚合和低特异面积的阻碍,限制了电池的性能.
研究的目的:
- 开发一种新的以溶剂为媒介的自组装策略,用于制造均,高表面积的PANI/减少氧化石墨烯 (PANI@RGO) 复合凝.
- 研究该策略对AZIB电化学性能的影响,特别关注高PANI含量和改善的结构性质.
主要方法:
- 采用了一种N-甲基-2-pyrrolidone (NMP) 支持的溶剂介导自组装工艺,利用π-π堆叠相互作用创建3D多孔PANI@RGO复合凝.
- 描述了复合材料的形态,特定表面积和毛孔结构,并与水辅助方法进行比较.
- 使用M-PANI@RGO-85%复合材料作为阴极材料制造和测试AZIB.
主要成果:
- 即使在PANI@RGO复合材料中达到高PANI含量 (85%) 的分子水平均性,被命名为M-PANI@RGO-85%.
- 与水辅助样本相比,M-PANI@RGO-85%复合物表现出显著更高的特定表面积 (189.55 m2 g-1) 和更大的介质孔 (36 nm).
- 制造的AZIB显示出高特异性容量 (200mAhg-1在0.5Ag-1),优异的速率性能 (135mAhg-1在10Ag-1),以及显著的低温能力 (148mAhg-1在1Ag-1在-20°C).
- 准固态电池实现了高能量 (198 Wh kg-1) 和功率密度 (11.3 kW kg-1).
结论:
- π-π堆叠辅助和溶剂介导的自组装方法在设计AZIB的先进有机电极方面是有效的.
- 这一策略克服了基于PANI的阴极的形态聚合和低表面积的局限性.
- 开发的M-PANI@RGO-85%复合物显示出高性能和稳定的水性离子电池的巨大潜力.
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