Regulated lithium ionic flux through well-aligned channels for lithium dendrite inhibition in solid-state batteries
Regulated lithium ionic flux through well-aligned channels for lithium dendrite inhibition in solid-state batteries
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DOI：
10.1016/j.ensm.2020.06.029
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发表时间：
2020-10
影响因子：
20.4
通讯作者：
Yang Li;D. Cao;W. Arnold;Yao Ren;Chao Liu;J. Jasinski;T. Druffel;Ye Cao;Hongli Zhu;Hui Wang
中科院分区：
文献类型：
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作者：
Yang Li;D. Cao;W. Arnold;Yao Ren;Chao Liu;J. Jasinski;T. Druffel;Ye Cao;Hongli Zhu;Hui Wang
利用固体电解质（SE）来抑制锂（Li）枝晶是有前景的，但由于锂沉积/剥离的不均匀性，仍远不能令人满意。在这里，我们展示了一种通过使用垂直排列的通道调节SE中的锂离子通量来抑制锂枝晶的新策略。离子绝缘壁有利于锂离子通量通过通道的均匀分布，导致均匀的锂沉积，从而减轻锂枝晶的形成。因此，具有该 SE 的对称电池对锂金属表现出优异的长期稳定性（1000 小时）。此外，采用所开发的SE的Li4Ti5O12(LTO)/Li电池在100次循环后取得了良好的电池性能。通过相场模拟进一步研究了枝晶抑制机制。这项工作提供了一种通过操纵均匀锂离子通量来制造SE来抑制锂枝晶的新颖策略，并促进了高性能可充电锂电池的开发。
The utilization of solid electrolyte (SE) to suppress lithium (Li) dendrites is promising but still far from satisfactory due to the inhomogeneous Li plating/stripping. Here, we demonstrated a novel strategy to inhibit Li dendritesviaregulating Li-ion flux in SE by using vertically aligned channels. The ion-insulating walls facilitated uniform distribution of Li-ion flux through the channels, leading to a homogeneous Li deposition, thus alleviating Li dendrite formation. As a result, symmetric cells with this SE exhibited excellent long-term stability (1000 h) against Li metal. In addition, Li4Ti5O12(LTO)/Li cell with the developed SE achieved good battery performance over 100 cycles. The mechanism for dendrite suppression was further investigated by phase-field simulation. This work provides a novel strategy by manipulating uniform Li-ion flux to fabricate SE to inhibit Li dendrites and facilitates the development of high-performance rechargeable Li batteries.