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通过对高利用率电池的界面水结合重塑涂/剥离行为
Xin Yang1, Ziyi Zhang2, Meiling Wu3,4
1Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan, 430062, China.
Advanced materials (Deerfield Beach, Fla.)
|August 1, 2023
概括
研究人员开发了一种细菌纤维素水凝,以稳定水性电池. 这种方法限制了电解质含量,抑制了树突,并提高了阳极利用率,以获得更安全,更持久的能量存储.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性电池对储能充满希望,但由于树突的形成而受到影响.
- 寄生反应和低阳极利用率阻碍了它们的实际应用.
- 减少电解质含量和控制水活动是缓解这些问题的关键策略.
研究的目的:
- 为了抑制副作用,并调节水性电池中稳定的涂/脱落.
- 为了证明一种细菌纤维素水凝的有效性,其电解质含量有限.
- 为了解水限制在重新塑造涂/脱落工艺中的作用提供见解.
主要方法:
- 开发了一种细菌纤维素 (BC) 水凝电解质,含水量有限.
- 使用BC水凝组装的对称Zn电池,电解质与容量比 (E/C) 为1.0g (Ah) -1.1.
- 在各种循环条件下,用BC水凝电解质测试了全细胞.
主要成果:
- 对称的 Zn 细胞在 6.5 mA cm-2 时表现出稳定的循环,放电深度为 85%.
- 全电池实现了212mA小时cm-2.2的放电能力.
- 在1000个循环后,BC水凝电解质在5Ag-1.1时显示了83%的容量保留.
结论:
- 在细菌纤维素水凝中限制水性电解质和粘合水有效抑制树突.
- 这一策略可以实现稳定和高效的涂/脱落,提高阳极利用率.
- 开发的水凝电解质为设计先进的水性电池提供了一个有前途的途径.
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