在20 mA cm-2和20 mAh cm-2的电池循环中启用了替换反应间位金属/固体电解质架构
Zhao Cai1, Yangtao Ou1, Bao Zhang2
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Journal of the American Chemical Society
|February 17, 2021
概括
研究人员使用替代反应开发了一种新的3D交叉金属/固体电解质电极. 这种设计稳定了体积变化并防止了副作用,使得高效和可逆的金属电池成为可能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 金属阳极对于高能量密度的可充电电池至关重要.
- 像体积变化和副作用这样的挑战阻碍了金属阳极的活力.
研究的目的:
- 设计一个稳定的3D数字化金属/固体电解质复合电极.
- 为了克服体积变化和防止金属阳极的副作用.
主要方法:
- 通过替代反应制造3D交叉 (Zn) 金属/固体电解质.
- 使用Zn金属和化溶液,然后进行电化学激活.
- 硫酸/化合物 (IHS) 复合电极的特性
主要成果:
- 达到高的Zn2+导电性 (56.9 ± 1.8 mS cm-1) 和转移数 (0.55).
- 经过700个周期的稳定涂/剥离,超电位低 (8 mV在1 mA cm-2).
- 在超高电流密度和面积容量 (20 mA cm-2, 20 mAh cm-2) 上表现出卓越的性能.
结论:
- 这种3D互数字化架构有效缓冲体积变化并防止侧面反应.
- 开发的Zn/IHS电极在温和水性电解质中显著优于现有的Zn金属电极.
- 这种制造方法可用于其他金属对,为下一代高能量密度电池提供了途径.
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