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异构多离子凝使得无基的水性Zn-I电池具有快速动力学

Jin-Lin Yang¹, Zehua Yu², Jiawen Wu^1,3

¹School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.

Advanced materials (Deerfield Beach, Fla.)

|August 23, 2023

概括

这项研究引入了一种用于可充电水性- (Zn-I₂) 电池的新型 hetero-polyionic 水凝电解质. 水凝有效地抑制了树突的生长和聚酸的穿,使电池的性能能够持续很长时间.

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:

可充电的水性- (Zn-I) 电池是有前途的储能设备.
关键的挑战包括可溶性聚酸的运输和树脂的生长,阻碍了商业化.

研究的目的:

为Zn-I₂电池设计一个异构聚离子水凝电解质.
为改善电池稳定性和寿命,解决聚酸穿和树脂石问题.

主要方法:

开发用于阴极的性多化凝 (PCH),用于管理物种.
加入阳极的聚离子水凝 (PAH),以确保均的离子流量并防止腐蚀.
用新型水凝电解质测试Zn对称细胞和Zn-I₂全细胞.

主要成果:

Zn对称细胞在1 mA cm-2下表现出超过3000小时的异常循环稳定性,在10 mA cm-2下表现出800小时的异常循环稳定性.
在8°C的18000个周期中,Zn-I₂全细胞表现出了显著的寿命,其容量衰减仅为每周期0.008 ‰,超过8000个周期.
hetero-polyionic 水凝电解质有效地减轻了穿效应和统一的 Zn 2+ 沉积.

结论:

设计的异构聚离子水凝电解质显著提高了水性Zn-I电池的循环稳定性和寿命.
这种方法为开发长寿命转换型水性电池提供了可行的策略.
该研究为下一代储能系统的先进水凝电解质设计提供了洞察力.

关键词:

在 Zn 电极位置上,电极位置为 Zn.水性Zn-I2电池的使用情况异多聚离子水凝是多元聚离子的.聚二化物穿运输公司氧化还原动力学

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