Enhanced energy storage performance of Mn-doped NBT-based flexible films by defect engineering

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-27 DOI:10.1016/j.jallcom.2024.177811

Lei Ning, Xia Luo, Ningning Sun, Yong Li, Pei Han, Xiaowei Li, Xihong Hao

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引用次数: 0

Abstract

The rapid development of advanced flexible electronics leads to higher demands on the energy storage performance and spatial adaptability of capacitors. Here, Mn²⁺ is doped into 0.6(Na_0.5Bi_0.5)TiO₃-0.4Bi(Mg_0.5Zr_0.5)O₃ (0.6NBT-0.4BMZ), which effectively reduces the carrier content by forming defective complexes through the bonding of Mn²⁺ with oxygen vacancies, while maintaining a relatively high polarizability and enhancing the breakdown strength. The optimal storage performance is demonstrated by the 0.6NBT-0.4BMZ film with a Mn doping amount of 1 mol%. The observed breakdown strength, storage density, and storage efficiency are 2,900 kV/cm, 60.2 J/cm³, and 60.3%, respectively. Furthermore, the films exhibit excellent stability in various temperature ranges (25~205 ℃), frequencies (1~5 kHz), fatigue tests (at 10⁷ charge/discharge cycles), and bending resistance tests (20,000 cycles/radius R ≈ 2 mm). These results indicate that NBT-based film materials hold great promise for future flexible energy storage applications.

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通过缺陷工程提高掺锰 NBT 柔性薄膜的储能性能

先进柔性电子技术的快速发展对电容器的储能性能和空间适应性提出了更高的要求。本文在 0.6（Na0.5Bi0.5）TiO3-0.4Bi（Mg0.5Zr0.5）O3（0.6NBT-0.4BMZ）中掺入了 Mn2+，通过 Mn2+ 与氧空位结合形成缺陷配合物，有效降低了载流子含量，同时保持了相对较高的极化率并增强了击穿强度。锰掺杂量为 1 摩尔%的 0.6NBT-0.4BMZ 薄膜证明了其最佳存储性能。观察到的击穿强度、存储密度和存储效率分别为 2,900 kV/cm、60.2 J/cm3 和 60.3%。此外，薄膜在各种温度范围（25~205 ℃）、频率（1~5 kHz）、疲劳测试（107 次充放电循环）和抗弯曲测试（20,000 次/半径 R ≈ 2 mm）中都表现出优异的稳定性。这些结果表明，基于 NBT 的薄膜材料在未来的柔性储能应用中大有可为。

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

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.