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防止阴极活性物质通过离子定耐用水性电池的焦岩基分离器溶解
Angewandte Chemie (International ed. in English)
|November 30, 2023
概括
一种新型的聚合物矩阵化化物分离器 (SZ) 有效地防止在水性电池中形成树和阴极溶解. 这一进步使得稳定的循环和高容量保持成为可能,为商业化铺平了道路.
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:
- 水性电池提供安全和经济高效的储能解决方案.
- 关键的挑战包括树突的形成和阴极材料的溶解,阻碍性能和寿命.
- 开发先进的分离器对于克服这些局限性至关重要.
研究的目的:
- 为水性电池开发一个聚合物矩阵式化物分离器 (SZ).
- 为了研究分离器抑制树突和阴极溶解的能力.
- 为了评估电池的电化学性能和循环稳定性,使用SZ分离器.
主要方法:
- 在灵活的聚合物膜上合成石材料,以创建SZ分离器.
- 将SZ分离器集成到水性电池配置中.
- 进行电化学测试,包括在各种电流密度下进行静电循环和容量保留测量.
主要成果:
- SZ分离器有效地抑制了树突的形成和从阴极中的泄漏.
- SZ电池在0.5 A g−1下表现出超过400个周期的稳定循环,初始容量为375.4 mAh g−1.1.
- 在15A g-1.1时观察到超过10,000个周期的异常长期稳定性.
- 在1000个循环中,SZ-V电池 (用预) 显示出94.6%的容量保留.
结论:
- 聚合物矩阵的化物分离器作为有效的离子屏障,增强水性电池的稳定性.
- 这种分离器技术通过减轻树突生长和阴极溶解,显著改善了循环寿命和容量保留.
- 开发的SZ分离器代表了水性储能器件商业可行性的重要一步.
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