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在3D金属宿主中通过对层次多金属氧化物进行表面修饰来增强离子扩散动力学

Dayun Jung¹, Youngseul Cho², Dohyeong Kim¹

¹Program in Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, 145 Gwanggyo-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16229, Republic of Korea.

ACS applied materials & interfaces

|May 20, 2024

概括

研究人员开发了一个3D金属氧化物纳米线框架,以改进用于高能电池的金属阳极. 这一创新提高了涂层的统一性和稳定性,为更安全,更持久的金属电池铺平了道路.

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
储能储能储能储能储能储能

背景情况:

金属阳极为金属电池 (LMB) 提供高能量密度.
商业化受限于树的增长和循环过程中的体积变化.
开发稳定的金属阳极对于下一代电池至关重要.

研究的目的:

引入一个3D层次的多金属氧化物纳米线框架作为金属阳极的电流收集器.
通过调节核和板来提高金属阳极的稳定性和性能.
为了克服金属阳极的树形成和体积变化的挑战.

主要方法:

使用CoO和CuO层制造3D层次的多金属氧化物纳米线框架.
使用框架作为金属阳极的电流收集器.
用LFP阴极对半细胞,对称细胞和全细胞进行电化学测试.

主要成果:

半细胞在1 mA cm-2下显示了97%的库伦比克效率,超过300个周期.
对称细胞在1 mA cm-2下显示稳定循环1500小时.
在使用LFP阴极的200个周期中,全细胞保持了92%的容量保留.

结论:

3D层次的多金属氧化物纳米线框架有效地促进了统一的涂层,并抑制了树的生长.
这种新的电流收集器设计显著提高了金属阳极的循环稳定性和库伦比效率.
这些发现为设计用于高性能金属电池的先进电流采集器提供了宝贵的见解.

关键词:

3D主机是一个3D主机.离子流量调节器离子流量调节器在现场发电金属阳极是一种金属阳极.金属氧化物的金属氧化物.固体电解质相间 (SEI) 阶段

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