Stabilization of the Highly Conductive Sodium Solid Electrolyte ht-NaCB9H10 Using High-Energy Ball Milling

IF 8.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2026-10-05 Epub Date: 2026-09-02 DOI:10.1021/acsmaterialslett.6c00464

Therese S. S. Faurskov, Jakob B. Grinderslev, Lasse R. Kristensen, Torben R. Jensen

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Abstract

The emerging solid-state battery technology must be enabled at sub-zero temperatures. This study investigates the effect of high-energy ball milling on sodium decahydrido-closo-1-carbadecaborate (NaCB₉H₁₀) by mechanically treating the solid electrolyte for 0, 15, 45, and 90 min. We show that mechanical treatment of NaCB₉H₁₀ stabilizes the highly sodium ionic conducting disordered ht-NaCB₉H₁₀ polymorph at temperatures down to –40 °C. Stable sodium stripping and plating in symmetrical Na|SE|Na cells is displayed at –10 °C for the solid electrolytes that were milled for 15 and 45 min. Furthermore, a novel polymorph of NaCB₉H₁₀ is revealed at low temperatures and tentatively ascribed to a monoclinic unit cell with space group P2₁/c. This work marks an important step toward tailoring closo-borate solid electrolytes for usage in low-temperature solid-state batteries.

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高能球磨稳定高导电性钠固体电解质ht-NaCB9H10

新兴的固态电池技术必须在零度以下的温度下启用。本研究通过机械处理固体电解质0、15、45和90 min，研究了高能球磨对十氢氧合-1-碳酸氢酸钠（NaCB9H10）的影响。研究表明，NaCB9H10的机械处理在-40℃的温度下稳定了高钠离子导电无序ht-NaCB9H10多晶。在对称Na|SE|Na电池中，在-10°C下，固体电解质研磨15和45 min，显示出稳定的钠剥离和镀。此外，在低温下发现了一种新的NaCB9H10晶型，并初步将其归因于具有P21/c空间群的单斜晶胞。这项工作标志着为低温固态电池定制近硼酸盐固体电解质的重要一步。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.