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离子引诱高可逆性阳极用于高性能离子电池
Shuang Zhou1, Xinyu Meng1, Yining Chen1
1Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Central South University, 410083, Changsha, Hunan, China.
Angewandte Chemie (International ed. in English)
|April 5, 2024
概括
一种新的离子定策略通过控制沉积和减少副作用来稳定水性离子电池. 这导致了非常长的电池寿命,并在实际的袋式电池应用中提高了性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 面临着不稳定的 (Zn) 接口的挑战,导致有害的副作用和不受控制的 Zn 树突增长,阻碍了实际应用.
- 在AZIB中,接口稳定性严重依赖于电解质组成和离子 (Zn2+) 沉积的行为.
- 现有的策略难以有效地管理Zn金属阳极稳定性和树突形成.
研究的目的:
- 提出一种新的离子定策略,以操纵化2+的协调结构,并指导离子沉积行为.
- 为了提高水性离子电池的接口稳定性和电化学性能.
- 为了证明在AZIBs中开发的战略的实际适用性.
主要方法:
- 引入充电离子添加剂 (DM) 作为电解质的离子.
- DM添加剂通过负电荷的-NR4+组吸附到Zn表面,引导均的Zn2+分布.
- 负电荷的 -SO3组的DM减少了Zn2+溶解中的活性水分子.
主要成果:
- 金属阳极呈现出高度有序和紧的 (002) 沉积,副作用微不足道.
- 开发的Zn下载RadioZn对称电池在0.25 mA cm-2和0.25 mAh cm-2下实现了长达7000小时的异常长寿命.
- 一个NH4V4O10白色子Zn囊细胞在180个周期中显示了80.4%的容量保留,负/正容量比率低 (N/P比率=2.98).
- 一个实用的4厘米*4厘米袋式电池在50个循环中保持了37.0 mAh的稳定输出容量.
结论:
- 拟议的离子定策略有效地操纵Zn2+协调和沉积,显著提高了AZIB的接口稳定性.
- 这种方法提供了一种可行的解决方案,以克服AZIBs中的树形成和寄生虫副作用.
- 该战略显示,开发高性能和持久的水性离子电池,用于实际储能应用,具有很大的前景.
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