<br>一石二鸟：绿色溶剂在非水和水电解质中实现高稳定性和耐用的锌阳极,Advanced Functional Materials

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一石二鸟：绿色溶剂在非水和水电解质中实现高稳定性和耐用的锌阳极
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-03-01 , DOI: 10.1002/adfm.202400949
Ahmad Naveed ₁ , Haoqiang Ai ₂ , Teng Li _{1,

3} , Amjad Ali ₁ , Jamile Mohammadi Moradian ₁ , Waqar Ahmad Qureshi ₁ , Mingru Su ₁ , Xiaowei Li ₁ , Yu Zhou ₁ , Ruiqiang Guo ₂ , Tao Wan ₄ , Chun‐Ho Lin ₄ , Dewei Chu ₄ , Yunjian Liu ₁

Affiliation

可充电锌电池是环保、安全且具有成本效益的储能解决方案的有前途的选择。然而，它们的商业应用面临着库仑效率（CE）低和锌阳极可逆性差等挑战。为了解决这些问题，我们开发了一种基于 N,N'-二甲基丙烯脲 (DMPU) 的新型绿色电解质，可提供坚固、无枝晶的锌阳极，具有超过 5000 小时的循环稳定性和 98.49% 的高平均 CE。 DMPU 电解质中的锌阳极的性能明显优于水性电解质，循环寿命延长了 67 倍，表现出优异的阳极稳定性。此外，DMPU电解质中的超稳定锌阳极在1.0 mA cm ^-2下循环超过10 000次，表现出优异的可逆性。二甲基丙烯脲-三氟甲磺酸根阴离子产生的固体电解质界面使得Zn ²⁺在电极界面处能够均匀且快速地扩散，从而形成结构化的六方锌沉积物。此外，作为电解质添加剂，DMPU在恶劣条件下（5.0和10.0 mA cm ^-2 ）显着稳定Zn阳极，同时CE显着增强（99.12%）。这项研究为开发混合电解质和有机电解质以推进锌电池技术提供了宝贵的见解。

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Two Birds with One Stone: Green Solvent Enabled High-Stability and Durable Zn Anode in Both Non-Aqueous and Aqueous Electrolytes

Rechargeable zinc batteries are promising choices for eco-friendly, safe and cost-effective energy storage solutions. However, their commercial adoption faces challenges such as low Coulombic efficiency (CE) and poor reversibility of Zn anodes. To address these issues, a new green electrolyte based on N,N'-Dimethylpropyleneurea (DMPU) has been developed, affording a robust, dendrite-free Zn anode with over 5000 h of cycle stability and a high average CE of 98.49%. Zn anode in DMPU-electrolyte significantly outperforms aqueous electrolyte with 67 times longer cycle life, demonstrating excellent anode stability. Moreover, ultra-stable Zn anode in DMPU-electrolyte cycled for over 10 000 cycles at 1.0 mA cm⁻² showcases excellent reversibility. The Dimethylpropyleneurea-triflate anion generated solid electrolyte interphase enables homogeneous and rapid Zn²⁺-diffusion at the electrode interface, leading to a structured hexagonal Zn deposit. Furthermore, as electrolyte additive, DMPU significantly stabilizes Zn anode at severe conditions (5.0 and 10.0 mA cm⁻²) along with remarkable enhancement in CE (99.12%). This study offers valuable insights into the development of hybrid and organic electrolytes to advance Zn battery technology.

更新日期：2024-03-01

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