在准固态电池的共价有机框架中的Na-ion导电道的生物灵感设计
Yingchun Yan1, Zheng Liu2, Ting Wan1
1School of Material Science and Engineering, China University of Petroleum, 266580, Qingdao, China.
Nature communications
|May 27, 2023
概括
本研究介绍了一种新型 (-COO−) 修改的共价有机框架 (COF),作为电池的准固态电解质. 这种新材料提供了增强的离子导电性和电化学稳定性,以实现更安全,高性能的离子储能.
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
- 纳米技术纳米技术
背景情况:
- 固态聚合物电解质是固态电池的关键,但在离子导电性和电化学稳定性方面面临挑战.
- 现有的电解质往往缺乏实际应用所需的性能.
研究的目的:
- 为离子电池开发一种高性能准固态电解质.
- 为了增强离子导电性和电化学稳定性,使用一种由生物系统启发的新型材料设计.
主要方法:
- 合成了 (-COO−) 修改的共价有机框架 (COF),以创建亚纳米Na+运输区.
- 研究了COF电解质的Na+运输机制和电化学特性.
- 使用开发的电解质制造并测试了Na3V2(PO4) 3硬币电池.
主要成果:
- 达到1.30×10−4 S cm−1的Na+导电性和高达5.32 V的氧化稳定性.
- 通过亚纳米,电子阴性区域 (6.7-11.6 Å) 展示了选择性的 Na+ 运输.
- 硬币细胞表现出快速反应动态,低极化,稳定循环1000个周期以上,容量衰减最小.
结论:
- 经 (-COO−) 修改的COF作为离子电池的有效准固态电解质.
- 材料设计可实现高效和选择性的Na+导电,克服传统固体电解质的局限性.
- 这项工作为开发先进的固态电池提供了一个有希望的途径.
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