根据结构调制和补偿策略的道氧化物阴极的复兴,朝着实际的离子圆柱形电池发展
Hanxiao Liu1,2, Lingyi Kong1,2, Hongrui Wang3
1College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|September 2, 2024
概括
这项研究通过将Na0.44MnO2与相合来增强离子电池阴极,提高稳定性和性能. 这一突破使得道氧化物阴极在18650圆柱形电池中的使用成为可能,推进了商业化.
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:
- 离子电池 (SIB) 是离子电池的一个有希望的替代品.
- 由于其稳定性和性能,Na0.44MnO2是SIB的潜在阴极材料.
- 挑战包括表面残留,多电压高原和低初始容量.
研究的目的:
- 优化Na0.44MnO2的散装相和表面特性,以提高SIB性能.
- 为了解决Na0.44MnO2作为阴极材料的局限性.
- 为了使道氧化物阴极能够在实际的SIB设备中应用.
主要方法:
- 协同调节策略涉及散装兴奋剂 (Ti替代Mn) 和表面修饰.
- 合成Na0.44Mn0.85Ti0.15O2与碳氧甲基纤维素结合剂.
- 制造普鲁士蓝色模拟 (PBA) -Na0.44Mn1-xTixO2复合材料.
- 硬币全电池和18650圆柱形电池的组装.
主要成果:
- 在2C的1000个循环后,Na0.44Mn0.85Ti0.15O2表现出94.30%的容量保留.
- 观察到表面残留的减少,增强的Na+运输动力学,以及改善的水/空气稳定性.
- 在全细胞中,PBA-Na0.44Mn1-xTixO2复合材料表现出令人满意的电化学性能.
- 使用优化的阴极成功制造了18650个圆柱形SIB.
结论:
- Ti-doped Na0.44MnO2 阴极在电化学性能和稳定性方面显著改善.
- 开发的复合材料和电池配置为实际的SIB应用铺平了道路.
- 这项研究代表了道氧化物阴极在18650圆柱形SIB中的首次应用,促进了商业化.
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