首页|锂氧电池中钌基电催化剂的研究进展

锂氧电池中钌基电催化剂的研究进展

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  • 国家科技期刊平台
  • NETL
  • NSTL
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可充电锂氧(Li-O2)电池因其高能量密度而受到广泛关注.然而,缓慢的阴极动力学导致较高过电压和较差的循环性能.为了克服这一问题,不同种类的阴极催化剂已经开始被探索.其中,钌基电催化剂已被证明是促进析氧反应(OER)的极具前景的阴极催化剂.由于钌基催化剂与超氧根阴离子(O2-)中间体之间存在强相互作用,因此可以通过调节Li2O2的形态来促进过氧化锂(Li2O2)的分解.本文介绍了钌基电催化剂的设计策略,以提高其在锂氧电池中的OER催化动力学.不同结构的钌基催化剂已经被总结,包括金属颗粒(钌金属和合金)、单原子催化剂和不同底物(碳材料、金属氧化物/硫化物)负载钌的化合物,以调节钌基电催化剂的电子结构和基体结构.这些钌基电催化剂调节了对LiC2的吸附,提高了 OER活性,抑制了副产物的形成,从而提升了 Li-O2电池的可逆性和循环稳定性.然而,Li-O2电池仍然面临着许多挑战.其中之一是锂金属阳极的问题,锂的不稳定性和安全性一直是Li-O2电池研究的一个关键问题.此外,电解质的选择和阴极材料的优化也是当前研究的重点之一.为了提高Li-O2电池的性能,还需要对添加剂(即氧化还原介质)进行更深入的研究,以提高电池的循环寿命和能量密度.这些挑战的克服将需要跨学科的合作和持续的研究努力,以推动Li-O2电池的进一步发展.
Recent Advances on Ruthenium-based Electrocatalysts for Lithium-oxygen Batteries
Rechargeable lithium-oxygen(Li-O2)batteries have attracted wide attention due to their high energy density.However,the sluggish cathode kinetics results in high overvoltage and poor cycling performance.Ruthenium(Ru)-based elec-trocatalysts have been demonstrated to be promising cathode catalysts to promote oxygen evolution reaction(OER).It facilitates decomposition of lithium peroxide(Li2O2)by adjusting Li2O2 morphologies,which is due to the strong interaction between Ru-based catalyst and superoxide anion(O2-)intermediate.In this review,the design strategies of Ru-based electrocatalysts are introduced to enhance their OER catalytic kinetics in Li-O2 batteries.Different configu-rations of Ru-based catalysts,including metal particles(Ru metal and alloys),single-atom catalysts,and Ru-loaded compounds with various substrates(carbon materials,metal oxides/sulfides),have been summarized to regulate the electronic structure and the matrix architecture of the Ru-based electrocatalysts.The structure-property relationship of Ru-based catalysts is discussed for a better understanding of the Li2O2 decomposition mechanism at the cathode interface.Finally,the challenges of Ru-based electrocatalysts are proposed for the future development of Li-O2 batteries.

Lithium-oxygen batteryRuthenium-based electrocatalystReaction mechanismReaction kineticsOvervoltage

王昱喆、蒋卓良、温波、黄耀辉、李福军

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南开大学化学学院,先进能源材料化学教育部重点实验室,天津 300071

天津物质绿色创造与制造海河实验室,天津 300192

锂-氧电池 钌基电催化剂 反应机理 反应速率 过电压

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHaihe Laboratory of Sustainable Chemical Transformations

2232590251671107

2024

10.61558/2993-074X.3466

电化学
中国化学会

电化学

CSTPCD北大核心
影响因子：0.263
ISSN：1006-3471
年,卷(期)：2024.30(8)