对高性能双离子电池的多聚烯合模式的评估
Xuezheng Chen1, Wen Chen1, Jianhua Hong1
1State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, Hainan University, Haikou 570228, China.
ACS applied materials & interfaces
|September 29, 2024
概括
聚烯 (PPy) 在双离子电池方面表现有前途. 在PPy电极中优化α-α合模式显著提高了离子合和特定容量,提高了电池性能.
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
- 聚合物科学 聚合物科学
背景情况:
- 聚烯 (PPy) 是一个有前途的P型电极材料用于双离子电池,由于其性能.
- 然而,PPy由于结构解体和不良的兴奋剂而受到低特异性和不良循环稳定性的影响.
- 在PPy链中聚合和交联阻碍了有效的离子兴奋剂.
研究的目的:
- 研究聚烯中不同合模式 (α-α,α-β,β-β) 对双离子电池性能的影响.
- 探索新的制备方法,以提高聚烯的电极性能.
- 为了确定PPy的合结构与其电化学性能之间的相关性.
主要方法:
- 使用不同的制备技术,合成具有不同合模式的聚烯.
- 使用界面冷聚合制造以产生具有主导α-α合模式的PPy (I-PPy).
- 通过电化学测试将I-PPy与来自电化学沉积 (E-PPy) 和化学氧化 (C-PPy) 的PPy进行比较.
主要成果:
- 界面冷聚合产生了I-PPy,主要采用α-α合模式.
- I-PPy表现出优越的离子兴奋剂能力和119 mAh的特定容量g-1在100 mAg-1.1.
- E-PPy和C-PPy的特定容量明显较低 (小于40 mAh g-1).
结论:
- 在聚烯电极中增加α-α合模式的比例是一个可行的策略.
- 这种结构优化增强了离子兴奋剂的能力,并提高了双离子电池的容量.
- 接口冷聚合法为改善基于聚烯的电极材料提供了一条途径.
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