Manufacturing of Platinum Nanocrystal-Embedded Nanoporous Metal Oxide Electrodes for High Performance Metal-Air Batteries

用于高性能金属-空气电池的铂纳米晶体嵌入纳米多孔金属氧化物电极的制造

• 批准号: 1851674
• 负责人: Yang Yang
• 金额: $ 30万
• 依托单位: The University of Central Florida Board of Trustees
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-05-01 至 2024-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1851674&HistoricalAwards=false
• 关键词: Manufacturing; Platinum; Nanocrystal; Embedded; Nanoporous

Metal-air batteries with bifunctional catalysts as cathodes are emerging technologies for renewable energy storage owing to their very competitive energy densities compared to fossil fuels. Nanoporous metal oxide electrodes embedded with platinum nanocrystals are believed to deliver high performance for metal-air batteries. Current methods for manufacturing platinum-metal oxide electrodes are impeded by inhomogeneous material distribution and composition, high energy consumption and low yield, which limit their scalable manufacturing. This award supports fundamental research to provide needed knowledge for the development of a scalable, room temperature electrochemical process for manufacturing of metal-air battery electrodes. The new process enables manufacturing of electrodes with homogeneous composition and seamless interface. Such materials result in high-performance metal-air batteries with high energy efficiencies and long cyclability. Nanoporous electrodes made from a wide variety of bifunctional catalysts are increasingly preferred for applications in energy, healthcare, biomedical, aerospace, chemical or automotive industries. Therefore, results from this research benefit the U.S. economy and society. This research involves several disciplines including manufacturing, electrochemistry, and materials science. The multi-disciplinary approach helps broaden participation of underrepresented groups in research and positively impacts engineering education.The pulse electrochemical manufacturing process overcomes several limitations of current electrochemical manufacturing techniques, which are lack of morphology and composition control and difficulty in the control of selective growth and etching kinetics. However, some scientific barriers are yet to be overcome to realize the full application potential of pulse electrochemical deposition and anodization for scalable manufacturing. This research is to fill the knowledge gap on the mechanisms of platinum nanocrystal (Pt-NC) facet selective growth and nanoporous framework formation during electrochemical deposition and anodization. The objectives are (1) to explore the nucleation and bottom-up growth kinetics of Pt-NCs in complex electrochemical systems containing multiple cations by using pulse electrochemical deposition, (2) to understand the roles of dynamic O2 bubbles in selective metal oxidation, etching, and nanopore top-down growth processes by pulse anodization, and (3) to uncover the processing-microstructure-property relationships in designing, manufacturing, and applying Pt-embedded metal oxide electrodes for metal-air batteries. The research team plans to perform advanced electrochemical analyses and materials characterizations to understand the mechanism of nanopore formation in electrochemical deposition and anodization, test the hypothesis that pulse voltage and frequency are the determining factors for nanopores and selective facets of Pt-NCs in electrochemical manufacturing, and establish relationships between process parameters and porosity in electrochemical deposition and anodization.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

以双功能催化剂为阴极的金属空气电池是可再生能源存储的新兴技术，因为与化石燃料相比，其能量密度非常有竞争力。嵌入铂纳米晶体的纳米多孔金属氧化物电极被认为可以为金属空气电池提供高性能。目前制造铂金属氧化物电极的方法受到材料分布和成分不均匀、高能耗和低产量的阻碍，从而限制了其可规模化制造。该奖项支持基础研究，为开发用于制造金属空气电池电极的可扩展的室温电化学工艺提供所需的知识。新工艺能够制造成分均匀且界面无缝的电极。这种材料可产生具有高能效和长循环性能的高性能金属-空气电池。由各种双功能催化剂制成的纳米多孔电极越来越受到能源、医疗保健、生物医学、航空航天、化学或汽车行业应用的青睐。因此，这项研究的结果有利于美国经济和社会。这项研究涉及制造、电化学和材料科学等多个学科。多学科方法有助于扩大代表性不足群体对研究的参与，并对工程教育产生积极影响。脉冲电化学制造工艺克服了当前电化学制造技术的一些局限性，即缺乏形貌和成分控制以及难以控制选择性生长和蚀刻动力学。然而，要充分发挥脉冲电化学沉积和阳极氧化在可扩展制造中的应用潜力，还需要克服一些科学障碍。本研究旨在填补电化学沉积和阳极氧化过程中铂纳米晶体（Pt-NC）晶面选择性生长和纳米多孔框架形成机制的知识空白。目标是 (1) 利用脉冲电化学沉积探索包含多种阳离子的复杂电化学系统中 Pt-NC 的成核和自下而上生长动力学，(2) 了解动态 O2 气泡在脉冲阳极氧化选择性金属氧化、蚀刻和纳米孔自上而下生长过程中的作用，以及 (3) 揭示加工-微观结构-性能之间的关系 设计、制造和应用用于金属空气电池的铂嵌入金属氧化物电极。研究团队计划进行先进的电化学分析和材料表征，以了解电化学沉积和阳极氧化中纳米孔形成的机制，检验脉冲电压和频率是电化学制造中Pt-NCs纳米孔和选择性面的决定因素的假设，并建立电化学沉积和阳极氧化中工艺参数和孔隙率之间的关系。该奖项反映了 通过使用基金会的智力价值和更广泛的影响审查标准进行评估，NSF 的法定使命被认为值得支持。

项目成果

Porous FeCo Glassy Alloy as Bifunctional Support for High‐Performance Zn‐Air Battery

• DOI: 10.1002/aenm.202002204
• 发表时间: 2020-12
• 期刊: Advanced Energy Materials
• 影响因子: 27.8
• 作者: Fuping Pan;Z. Li;Zhenzhong Yang;Q. Ma;Maoyu Wang;Han Wang;M. Olszta;Guanzhi Wang;Zhenxing Feng;Yingge Du;Yang Yang-Yang

Stabilizing atomic Pt with trapped interstitial F in alloyed PtCo nanosheets for high-performance zinc-air batteries

• DOI: 10.1039/c9ee02657f
• 发表时间: 2020-03
• 期刊: Energy and Environmental Science
• 影响因子: 32.5
• 作者: Z. Li;W. Niu;Zhenzhong Yang;Nusaiba Zaman;W. Samarakoon;Maoyu Wang;A. Kara;M. Lucero;Manasi V. V

Surface oxygenation induced strong interaction between Pd catalyst and functional support for zinc–air batteries

表面氧化引起锌空气电池的钯催化剂和功能载体之间的强相互作用

• DOI: 10.1039/d1ee03972e
• 发表时间: 2022
• 期刊: Energy & Environmental Science
• 影响因子: 32.5
• 作者: Zhang, Wei;Chang, Jinfa;Wang, Guanzhi;Li, Zhao;Wang, Maoyu;Zhu, Yuanmin;Li, Boyang;Zhou, Hua;Wang, Guofeng;Gu, Meng
• 通讯作者: Gu, Meng

Atomically dispersed catalysts for small molecule electrooxidation in direct liquid fuel cells

用于直接液体燃料电池中小分子电氧化的原子分散催化剂

• DOI: 10.1016/j.jechem.2021.12.017
• 发表时间: 2022
• 期刊: Journal of Energy Chemistry
• 影响因子: 13.1
• 作者: Chang, Jinfa;Wang, Guanzhi;Zhang, Wei;Yang, Yang
• 通讯作者: Yang, Yang

Boosting alkaline hydrogen evolution: the dominating role of interior modification in surface electrocatalysis

• DOI: 10.1039/d0ee01750g
• 发表时间: 2020-09-01
• 期刊: ENERGY & ENVIRONMENTAL SCIENCE
• 影响因子: 32.5
• 作者: Li, Zhao;Niu, Wenhan;Yang, Yang
• 通讯作者: Yang, Yang