相关实验视频
Updated: Jun 25, 2025

06:58
Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
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深度放电,静静稳定,长寿命Zn阳极由自发的SEI形成
Jin Yu1, Zhehan Yi2, Xiao Yan3
1Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|May 28, 2024
概括
研究人员通过创建保护性Zn4(OH)6SO4·xH2O固体电解质介相 (SEI) 来开发出用于离子电池 (ZIB) 的稳定阳极. 这提高了循环稳定性,并抑制了树岩的形成,为实际的能量储存铺平了道路.
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:
- 离子电池 (ZIB) 提供安全和低成本的能源存储.
- 由于阳极循环稳定性差,实际应用受到阻碍,特别是在高充电深度或休息期后.
研究的目的:
- 为了解决ZIB中阳极的循环稳定性不佳的问题.
- 开发一种方法,在阳极上制造稳定的固体电解质介相 (SEI).
主要方法:
- 简单的接口设计可以实现自发形成 Zn4OH) 6SO4·xH2O (ZHS) SEI 在 ZnSO4电解质中的 Zn粉.
- 在放电深度 (DOD) 和休息期后对ZHS-Zn阳极性能进行电化学测试.
主要成果:
- 超薄的ZHS SEI有效地隔离水,并导导Zn2+离子,抑制进化和树突形成.
- 该ZHS-Zn阳极在50%的DOD下经过500多个小时的稳定循环,并在25%的DOD下休息40天后保持性能.
- 使用ZHS-Zn阳极的Zn-MnxV2O5全电池实现了118Wh Kg-1的能量密度.
结论:
- ZHS SEI显著提高了ZIB中阳极的循环稳定性和寿命.
- 简单的制造方法,可扩展到1米,表明商业化有很大的潜力.
- 这一进步有助于ZIB用于大规模储能的实际应用.
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