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定制孔隙结构和性站点双梯度自由立式3D基阳极,使优秀的金属电池成为可能

Xiangxiang Fu¹, Yangming Hu¹, Wanting Li¹

¹Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|August 9, 2024

概括

一种具有梯度孔和性位点的新型双梯度3D宿主 (GDPL-3DH) 能够实现均的沉积,防止树突,并在对称细胞中实现5250小时的寿命.

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:

金属阳极对于高能量密度电池至关重要.
传统的3D主机遭受不均的沉积,导致树突和寿命缩短.
开发先进的3D主机是克服这些限制的关键.

研究的目的:

设计和制造一种新的双梯度3D主机 (GDPL-3DH),用于统一的沉积.
研究梯度孔结构和友位对核和生长的协同效应.
在以为基础的对称和全电池中评估GDPL-3DH的电化学性能.

主要方法:

电子旋转被用来构建双梯度3D主机.
使用光学显微镜和扫描电子显微镜 (SEM) 来观察沉积模式.
进行了电化学测试,包括对称和全细胞的静电循环.

主要成果:

GDPL-3DH显示了梯度增加的电导率.
实现了统一的"底部-顶部"沉积,抑制了树岩的形成.
对称的细胞表现出5250小时的超长寿命,在2mA cm-2.2时.
带有各种阴极 (LiFePO4,S/C,LiNi0.8Co0.1Mn0.1O2) 的完整电池表现出色,基于LiFePO4的电池在700个循环后保持了94.7%的容量.

结论:

双梯度策略有效调节沉积,提高电池的安全性和寿命.
GDPL-3DH为实际的金属电池提供了一个有前途的平台.
这种方法为控制核和生长机制提供了新的见解.

关键词:

双梯度宿主是一个双梯度宿主.的亲和度梯度是的亲和度梯度.金属阳极是一种金属阳极.孔隙梯度的梯度是什么底顶的沉积方式.

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