High entropy oxides (HEOs) with ideal element tunability and enticing entropy-driven stability have exhibited unprecedented application potential in electrochemical lithium storage. However, the general control of dimension and morphology remains a major challenge. Here, scalable HEO morphology modulation is implemented through a salt-assisted strategy, which is achieved by regulating the solubility of reactants and the selective adsorption of salt ions on specific crystal planes. The electrochemical properties, lithiation mechanism, and structure evolution of composition- and morphology-dependent HEO anode are examined in detail. More importantly, the potential advantages of HEOs as electrode materials are evaluated from both theoretical and experimental aspects. Benefiting from the high oxygen vacancy concentration, narrow band gap, and structure durability induced by the multi-element synergy, HEO anode delivers desirable reversible capacity and reaction kinetics. In particular, Mg is evidenced to serve as a structural sustainer that significantly inhibits the volume expansion and retains the rock salt lattice. These new perspectives are expected to open a window of opportunity to compositionally/morphologically engineer high-performance HEO electrodes.

具有理想的元素可调性和诱人的熵驱动稳定性的高熵氧化物（HEO）在电化学锂存储中表现出了前所未有的应用潜力。然而，尺寸和形态的总体控制仍然是一个重大挑战。在这里，可扩展的HEO形貌调节是通过盐辅助策略实现的，这是通过调节反应物的溶解度和盐离子在特定晶面上的选择性吸附来实现的。详细研究了组成和形态相关的 HEO 阳极的电化学性能、锂化机制和结构演变。更重要的是，从理论和实验两个方面评估了HEO作为电极材料的潜在优势。受益于高氧空位浓度、窄带隙，以及由多元素协同作用引起的结构耐久性，HEO 阳极提供理想的可逆容量和反应动力学。特别是，镁被证明可以作为结构支撑物，显着抑制体积膨胀并保留岩盐晶格。这些新观点预计将为在成分/形态上设计高性能 HEO 电极打开一扇机会之窗。