Oxygen-powered sustainable FePO4 preparation for sodium metal batteries with Li acetate recovery†

IF 30.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Energy & Environmental Science Pub Date : 2024-12-20 DOI:10.1039/D4EE03951C

Fumiyasu Nozaki, Shaoning Zhang, Martin Hoffmann Petersen, Jinkwang Hwang, Jin Hyun Chang, Juan María García-Lastra and Kazuhiko Matsumoto

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Abstract

Triphylite NaFePO₄ emerges as a promising solution for sodium secondary batteries due to its abundant constituent elements and high energy density, making it attractive for sustainable energy storage applications. However, the direct synthesis of triphylite NaFePO₄ is hindered by its thermal metastability. In this study, we propose an oxygen-powered sustainable production method for heterosite FePO₄, the desodiated form of triphylite NaFePO₄, derived from LiFePO₄. Oxygen gas serves as the oxidizing agent for delithiating LiFePO₄, and a closed-loop process has been successfully established to enable lithium recycling, which is essential for achieving cost-effective FePO₄ production. Furthermore, we propose a high energy density metal cell configuration that utilizes the charged state of sodium metal batteries (Na/FePO₄ configuration), aiming to improve the cyclability of Na-metal-free cells while maintaining the high energy density, thereby addressing a significant challenge in sodium metal battery technology.

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钠金属电池用醋酸锂回收法制备FePO4的氧动力可持续工艺研究

Triphylite NaFePO4因其丰富的组成元素和高能量密度而成为钠二次电池的一种有前途的解决方案，使其在可持续储能应用中具有吸引力。然而，三叶石NaFePO4的直接合成受到其热亚稳性的阻碍。在这项研究中，我们提出了一种氧动力可持续生产异质FePO4的方法，这是由LiFePO4衍生而来的三叶石NaFePO4的脱核形式。氧气作为氧化剂用于LiFePO4的氧化，并成功建立了一个闭环过程来实现锂的回收，这对于实现成本效益高的FePO4生产至关重要。此外，我们提出了一种高能量密度的金属电池结构，利用钠金属电池的带电状态（Na/FePO4结构），旨在提高无钠金属电池的可循环性，同时保持高能量密度，从而解决钠金属电池技术的重大挑战。

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来源期刊

Energy & Environmental Science 化学-工程：化工

CiteScore

50.50

自引率

2.20%

发文量

349

审稿时长

2.2 months

期刊介绍： Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).