“Peapod-like” Fiber Network: A Universal Strategy for Composite Solid Electrolytes to Inhibit Lithium Dendrite Growth in Solid-State Lithium Metal Batteries,Nano Letters

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“Peapod-like” Fiber Network: A Universal Strategy for Composite Solid Electrolytes to Inhibit Lithium Dendrite Growth in Solid-State Lithium Metal Batteries
Nano Letters ( IF 9.6 ) Pub Date : 2024-07-15 , DOI: 10.1021/acs.nanolett.4c02274
Wanqing Fan ₁ , Jingren Gou ₂ , Ying Huang ₁ , Kaihang She ₁ , Meng Yu ₁ , Zheng Zhang ₂

Affiliation

Solid-state lithium metal batteries (SSLMBs) are a promising energy storage technology, but challenges persist including electrolyte thickness and lithium (Li) dendrite puncture. A novel three-dimensional “peapod-like” composite solid electrolyte (CSEs) with low thickness (26.8 μm), high mechanical strength, and dendrite inhibition was designed. Incorporating Li₇La₃Zr₂O₁₂ (LLZO) enhances both mechanical strength and ionic conductivity, stabilizing the CSE/Li interface and enabling Li symmetric batteries to stabilize for 3000 h. With structural advantages, the assembled LFP||Li and NCM811||Li cells exhibit excellent cycling performance. In addition, the constructed NCM811 pouch cell achieves a high gravimetric/volumetric energy density of 307.0 Wh kg^–1/677.7 Wh L^–1, which can light up LEDs under extreme conditions, demonstrating practicality and high safety. This work offers a generalized strategy for CSE design and insights into high-performance SSLMBs.

中文翻译：

“豆荚状”纤维网络：复合固体电解质抑制固态锂金属电池中锂枝晶生长的通用策略

固态锂金属电池（SSLMB）是一种很有前景的储能技术，但挑战仍然存在，包括电解质厚度和锂（Li）枝晶击穿。设计了一种新型三维“豆荚状”复合固体电解质（CSE），具有低厚度（26.8μm）、高机械强度和枝晶抑制作用。掺入Li ₇ La ₃ Zr ₂ O ₁₂ (LLZO)可增强机械强度和离子电导率，稳定CSE/Li界面并使Li对称电池稳定3000小时。凭借结构优势，组装的LFP||Li和NCM811||Li电池表现出优异的循环性能。此外，所构建的NCM811软包电池实现了307.0 Wh kg ^–1 /677.7 Wh L ^–1的高重量/体积能量密度，可以在极端条件下点亮LED，展示了实用性和高安全性。这项工作提供了 CSE 设计的通用策略以及对高性能 SSLMB 的见解。

更新日期：2024-07-15

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