Bansal Neetu, Kumar Nitish, Pathak Prakash Kumar, Ahn Heejoon, Tang Jing, Yamauchi Yusuke, Salunkhe Rahul R
Materials Research Laboratory, Department of Physics, Indian Institute of Technology Jammu, Jagti, NH-44, PO Nagrota, Jammu, Jammu and Kashmir, 181221, India.
Department of Industrial and Materials Science, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.
Adv Mater. 2025 Aug;37(34):e2501490. doi: 10.1002/adma.202501490. Epub 2025 Jun 12.
Nanoscale manipulation of electronic and ionic charge interactions within electrode materials is the cornerstone for advancing electrochemical energy storage. Compared to bulk materials, 2D confined anodes provide lamellar channels to mobile ions for electrochemical interactions. However, individual 2D layers are often inefficient in delivering desired properties for stable and rapid kinetics in battery operations. To address this, 2D-2D heterostructures (2D HRs) that integrate the properties of two or more layers via van der Waals or covalent bonds can give optimized interfacial features. These structures modulate electronic properties, such as band positions, activation energies, diffusion barriers, and binding energies for intercalating ions, thereby regulating the electrochemical characteristics of batteries to meet practical challenges. In this context, this review includes the latest experimental and theoretical investigations to explore the multifunctional roles of 2D HRs in monovalent ion (Li, Na, and K) batteries (MIBs). First, it elucidates the fundamentals concerning the impacts of HRs in charge storage mechanisms and outlines pathways for synthesizing their novel designs. Then, it summarizes the different configurations of 2D HRs utilized in designing MIBs. Finally, it underscores the current challenges and future perspectives for implementing 2D HRs as advanced anode materials in batteries.
对电极材料中的电子和离子电荷相互作用进行纳米级调控是推动电化学储能发展的基石。与块状材料相比，二维受限阳极能为移动离子提供层状通道以进行电化学相互作用。然而，单个二维层在电池运行中往往难以提供实现稳定快速动力学所需的理想性能。为解决这一问题，通过范德华力或共价键整合两层或多层特性的二维-二维异质结构（2D HRs）可呈现优化的界面特征。这些结构可调节电子特性，如能带位置、活化能、扩散势垒以及嵌入离子的结合能，从而调控电池的电化学特性以应对实际挑战。在此背景下，本综述涵盖了最新的实验和理论研究，以探究二维异质结构在一价离子（锂、钠和钾）电池（MIBs）中的多功能作用。首先，阐述了异质结构对电荷存储机制影响的基本原理，并概述了合成其新颖设计的途径。接着，总结了用于设计MIBs的二维异质结构的不同构型。最后，强调了将二维异质结构作为先进阳极材料应用于电池时当前面临的挑战和未来展望。
