Pore-Filling Induced Solid Electrolyte Failure of Ti-Doped Na3Zr2Si2PO12 Characterized by Operando Synchrotron X-Ray Tomography**

IF 5.1 4区 材料科学 Q2 ELECTROCHEMISTRY Batteries & Supercaps Pub Date : 2024-08-13 DOI:10.1002/batt.202400429
Mengya Li, Marm Dixit, Pavel Shevchenko, Francesco De Carlo, Mahalingam Balasubramanian, Ilias Belharouak
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Abstract

Solid-state batteries (SSBs), particularly those utilizing sodium metal, are emerging as a promising technology due to their potential for enhanced safety, higher energy density, and longer cycle life. NASICON (Na superionic conductor) materials, known for their robust crystalline structure and high ionic conductivity, are pivotal in the development of efficient sodium all-solid-state batteries. These materials exhibit high room-temperature ionic conductivity and electrochemical stability, making them ideal for various applications. Research has focused on improving NASICON's ionic conductivity and stability through doping, interface regulation, and composite anode design. Recent advancements include Ti-doped Na3Zr2Si2PO12 (Ti-NZSP), which demonstrates improved surface stability, higher ionic conductivity, and increased critical current density. However, challenges such as Na dendrite formation and mechanical integrity under operational conditions persist. Advanced imaging techniques like operando synchrotron X-ray tomography have provided insights into failure mechanisms, revealing that pore-filling and dendrite growth are significant issues. Understanding these processes is essential for enhancing the performance and safety of Na-based SSBs. This study underscores the need for continued research to address these challenges and develop reliable, high-performance solid-state electrolytes for future energy storage solutions.

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通过操作同步辐射 X 射线断层扫描表征掺钛 Na3Zr2Si2PO12 的孔隙填充诱导固态电解质失效
固态电池(SSB),尤其是使用金属钠的固态电池,因其具有更高的安全性、更高的能量密度和更长的循环寿命,正在成为一项前景广阔的技术。NASICON(钠超离子导体)材料以其坚固的晶体结构和高离子电导率而著称,在开发高效钠全固态电池方面起着关键作用。这些材料具有较高的室温离子导电性和电化学稳定性,是各种应用的理想选择。研究重点是通过掺杂、界面调节和复合阳极设计来提高 NASICON 的离子导电性和稳定性。最近取得的进展包括掺杂钛的 Na3Zr2Si2PO12(Ti-NZSP),它具有更好的表面稳定性、更高的离子电导率和临界电流密度。然而,Na 树枝状晶粒的形成和运行条件下的机械完整性等挑战依然存在。先进的成像技术(如原位同步辐射 X 射线层析成像技术)使人们对失效机制有了更深入的了解,揭示出孔隙填充和枝晶生长是一个重大问题。了解这些过程对于提高钠基 SSB 的性能和安全性至关重要。这项研究强调了继续研究的必要性,以应对这些挑战,并为未来的储能解决方案开发可靠、高性能的固态电解质。
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来源期刊
CiteScore
8.60
自引率
5.30%
发文量
223
期刊介绍: Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.
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