通过电子调节的原子-二利用表面对孔接口进行脱激活和运输,用于氧化逆流电池
Xiangyang Zhang1, Agnes Valencia1, Weilu Li1
1Department of Mechanical Engineering, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China.
Advanced materials (Deerfield Beach, Fla.)
|August 22, 2023
概括
氧还原流电池 (VRFB) 的新型接口设计通过解催化剂激活和离子传输来提高能源效率和功率密度. 这一突破有望实现更可持续,更具成本效益的电网规模储能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氧化还原流电池 (VRFB) 对于可再生能源的电网规模储能至关重要.
- 在VRFB中,高负载催化剂面临着由于联的质量运输和激活过程的挑战,这限制了性能.
- 在VRFB中实现高能量密度需要克服这些传输限制.
研究的目的:
- 开发VRFB的表面对孔接口设计,使激活和传输过程脱.
- 通过一种新的接口结构,释放原子 (Bi) 的催化潜力.
- 为了提高氧还原流电池的性能和耐用性.
主要方法:
- 在一个不对称的Bi─O─Mn结构中设计了一个与电子调节的原子-Bi催化剂的功能接口.
- 包含一个中孔性Mn3O4子脚手架,用于快速运送氧化还原活性物种.
- 在现场将接口移植到微米多孔的碳上 (Bi1-sMn3O4-CF).
主要成果:
- 在400 mA cm-2电流密度下实现了创纪录的76.72%的高能效.
- 达到1.503W cm-2的峰值功率密度,显著超过没有Bi催化剂的电池.
- 证明了超过1500个循环的非凡耐用性.
结论:
- 表面对孔接口设计有效地解了激活和传输,最大限度地提高了网站的可访问性.
- 原子-Bi暴露的催化表面与中孔支架集成,为高性能VRFB提供了一个有希望的战略.
- 这一突破代表了朝着可持续和成本效益的氧化还原流电池 (RFB) 迈出的重大进展.
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