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通过大规模的两步方法创建的三合一阳极,实现了卓越的长期循环可逆性和薄电极完整性
Hongfei Lu1, Di Zhang1, Zhenjie Zhu1
1Research Center of Grid Energy Storage and Battery Application, School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China.
概括
这项研究引入了用于水性离子电池的新型三合一阳极,克服了薄阳极中的树问题. 这一创新可实现长期稳定的循环,为实际的电池应用铺平了道路.
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:
- 薄阳极对于实用的水性离子电池至关重要,但患有树突和不均脱落,限制性能.
- 现有的阳极面临着减少活性面积和短周期寿命的挑战.
研究的目的:
- 为水性离子电池开发低成本,薄阳极,增强稳定性和寿命.
- 解决传统薄阳极的局限性,包括树突形成和不均脱落.
主要方法:
- 采用一个大规模的两步方法来创建一个三合一的阳极.
- 开发了一种自动电装置,用于在铜上连续沉积.
- 在阳极上施加了碳素甲基纤维素 (CMC) - 化 (ZnF2) 保护层.
主要成果:
- 该CMC-ZnF2涂层的铜显示了超过3000个可逆沉积/剥离周期,具有99.94%的库伦比效率.
- 三合一阳极实现了累计容量为6 Ah cm-2.
- 采用拟议的阳极的ZnVO电池在15000个循环后保持超过70%的容量保留.
结论:
- 开发的三合一阳极有效抑制树突,并确保均的离子供应,显著提高电池性能.
- 自动电装置和新型阳极设计有利于水性电池薄阳极的工业化.
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