A 3D Framework with an In Situ Generated Li3N Solid Electrolyte Interphase for Superior Lithium Metal Batteries,Advanced Functional Materials

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A 3D Framework with an In Situ Generated Li3N Solid Electrolyte Interphase for Superior Lithium Metal Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-09-08 , DOI: 10.1002/adfm.202308022
Xiangxiang Fu ₁ , Huanhuan Duan ₁ , Leiting Zhang ₂ , Yangming Hu ₁ , Yuanfu Deng _{1,

3}

Affiliation

The practical application of lithium (Li) metal for next-generation rechargeable batteries is still hampered by uncontrolled growth of Li dendrite and severe volume change under repeated plating/stripping. Introducing a 3D structure to reserve space for Li storage and inducing uniform plating/stripping by a lithophilic interface layer are effective strategies to solve these problems. Herein, a novel 3D composite Li anode (Fe-N@SSM-Li) is constructed via an in situ reaction between Li and lithiophilic Fe₂N/Fe₃N (Fe-N) uniformly anchored on a stainless-steel mesh (SSM). The unique lithiophilic-conductive structure of the Fe-N@SSM-Li can stabilize the Li anode by effectively inducing uniform and dense deposition and confining Li deposition inside the Fe-N@SSM-Li to alleviate volume changes. The Fe-N@SSM-Li displays a distinguished electrochemical performance, with superior lifespan of 5000, 2250, and 1350 h under 1 mA cm⁻²/1 mAh cm⁻², 5 mA cm⁻²/3 mAh cm⁻², and 20 mA cm⁻²/3 mAh cm⁻² in symmetric cells, respectively. Combined with this highly stable Fe-N@SSM-Li, the full cells using LiFePO₄ (LFP) and S/C cathodes both show significantly improved electrochemical performances. This work provides a low-cost and scalable strategy for the construction of high-efficiency Li anode with a novel 3D structure, offers new insights to the research of Li metal batteries and beyond.

中文翻译：

用于高级锂金属电池的具有原位生成的 Li3N 固体电解质界面的 3D 框架

锂（Li）金属在下一代可充电电池中的实际应用仍然受到锂枝晶不受控制的生长以及重复电镀/剥离下严重的体积变化的阻碍。引入3D结构来预留锂存储空间并通过亲石界面层诱导均匀电镀/剥离是解决这些问题的有效策略。在此，通过Li和亲锂性Fe ₂ N/Fe ₃ N（Fe- N）均匀地锚定在不锈钢网（SSM）上。 Fe-N@SSM-Li独特的亲锂导电结构可以通过有效诱导均匀致密的沉积并将Li沉积限制在Fe-N@SSM-Li内部以减轻体积变化来稳定Li负极。 Fe-N@SSM-Li表现出卓越的电化学性能，在1 mA cm ⁻² /1 mAh cm ⁻² 、5 mA下具有5000、2250和1350小时的优异寿命cm ⁻² /3 mAh cm ⁻² 和 20 mA cm ⁻² /3 mAh cm ⁻² 对称电池。与这种高度稳定的 Fe-N@SSM-Li 相结合，使用 LiFePO ₄ (LFP) 和 S/C 阴极的全电池均表现出显着改善的电化学性能。这项工作为构建具有新颖3D结构的高效锂负极提供了一种低成本且可扩展的策略，为锂金属电池及其他领域的研究提供了新的见解。

更新日期：2023-09-08

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