层次结构促进了双碳微球的化/脱化行为,支持纳米-Co3O4极
1SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Integrated Circuits, Southeast University, Nanjing 210096, China. lizhong@seu.edu.cn.
Nanoscale
|January 18, 2024
概括
这项研究介绍了一种新的双碳微球支持的氧化物电极,用于微型离子电池. 独特的结构增强了稳定性和导电性,显著提高了纳米/微电子机械系统的电化学性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 高容量过渡金属氧化物 (TMO) 在N/MEMS中的微尺度离子电池 (LIB) 中至关重要.
- TMO电极遭受机械降解和电子传输不良,限制了它们的性能.
- 开发稳定和导电的TMO电极对于先进的能量存储至关重要.
研究的目的:
- 为了制造和描述双碳微球 (DCMS) 支持的Co3O4电极.
- 调查DCMS框架所提供的结构稳定性和电子导电性改进.
- 为了评估LIB应用的新型电极的电化学性能.
主要方法:
- 喷雾干燥和溶热合成用于DCMS支持的Co3O4制造.
- 用分散的Co3O4纳米粒子进行3D层次的半孔异构结构设计.
- 现场传输电子显微镜 (TEM) 用于结构分析和应变适应性研究.
主要成果:
- 该DCMS框架提供了卓越的应变适应和电子导电性.
- 层次电极实现了高容量:1205.2 mAh g-1 在0.1 A g-1 和678.1 mAh g-1 在2 A g-1.
- 在100个循环后,在0.3A g-1时观察到92.2%的异常容量保留.
结论:
- 开发的DCMS支持的Co3O4电极为微尺度LIB提供了卓越的电化学性能.
- 简单,低成本的制造方法可用于先进的高容量电极开发.
- 这项工作为克服基于TMO的阳极的局限性提供了一个有希望的策略.
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