On the length scale and rate-dependent mechanical behavior of monolithic (oxy)sulfidic glassy solid-state electrolytes

IF 2.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Erik G. Herbert, Yubin Zhang, Thomas A. Yersak
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Abstract

In the controlled atmosphere of a dedicated glove box, nanoindentation performed with a diamond Berkovich indenter tip has been used to examine the mechanical behavior of three (oxy)sulfide solid-state electrolytes (SSEs), 70Li2S·(30−x)P2S5·xP2O5 (x = 0, 2, and 5). At a drive frequency of 120 Hz, the elastic modulus is found to be predominantly depth independent over the range of 100 nm to 1 μm and generally insensitive to the varying mol fraction of oxygen (0, 2, and 5%) as well as the imposed strain rates of 0.025, 0.05, and 0.1 1/s. All three SSEs exhibit significant room-temperature creep. Strain burst activity observed during loading (potentially representative of pore collapse or cracking) is attenuated with the addition of oxygen. The hardness is found to be insensitive to the imposed strain rates but varying with depth and oxygen content. The highest oxygen concentration yields the lowest hardness and strongest depth dependence.

Graphical abstract

Nanoindentation of monolithic (oxy)sulfide glass solid-state electrolytes in an inert environment yields rate and depth dependent behavior.

Abstract Image

整体(氧)硫化玻璃固态电解质的长度尺度和速率依赖性机械行为
在专用手套箱的可控气氛中,使用金刚石 Berkovich 压头对三种(氧)硫化物固态电解质(SSE)70Li2S-(30-x)P2S5-xP2O5(x = 0、2 和 5)进行了纳米压痕测试。在 120 Hz 的驱动频率下,弹性模量在 100 nm 至 1 μm 的范围内主要与深度无关,并且对不同的氧气摩尔分数(0、2 和 5%)以及 0.025、0.05 和 0.1 1/s 的施加应变率基本不敏感。所有三种 SSE 都表现出明显的室温蠕变。在加载过程中观察到的应变爆发活动(可能代表孔隙塌陷或开裂)在添加氧气后有所减弱。硬度对施加的应变率不敏感,但随深度和氧气含量而变化。图解摘要在惰性环境中对整体(氧)硫化玻璃固态电解质进行纳米压痕处理,可获得与速率和深度相关的行为。
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来源期刊
Journal of Materials Research
Journal of Materials Research 工程技术-材料科学:综合
CiteScore
4.50
自引率
3.70%
发文量
362
审稿时长
2.8 months
期刊介绍: Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory
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