Unique Structural Design and Strategies for Germanium-Based Anode Materials Toward Enhanced Lithium Storage
Unique Structural Design and Strategies for Germanium-Based Anode Materials Toward Enhanced Lithium Storage
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DOI：
10.1002/aenm.201700488
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发表时间：
2017-12-06
影响因子：
27.8
通讯作者：
Guo, Zaiping
中科院分区：
文献类型：
--
作者：
Li, Dan;Wang, Hongqiang;Guo, Zaiping
锗基材料作为锂离子电池的阳极引起了越来越多的兴趣，这源于锗固有的物理和化学优势。本文简要介绍了锗基材料在锂存储领域的研究进展。突出了实现增强电化学性能的最先进策略，其主要目的是解决最棘手的问题：循环过程中锗的体积变化。这些策略包括结构改性、表面涂层改性、形成锗基合金以及形成二元或三元锗基复合材料。最近的工作在一个新的复合材料的锗和锡颗粒封装在双同心碳空心球也在这里，强调结构设计和性能改善之间的关系。
Germanium-based materials are arousing increasing interest as anodes for lithium-ion batteries, stemming from the intrinsic physical and chemical advantages of germanium. This progress report provides a brief review on the current development of germanium-based materials in lithium storage. The state-of-the-art strategies to achieve enhanced electrochemical properties are highlighted, with their main aim being to resolve the trickiest issue: vast volume changes in germanium during cycling. These strategies include structural modification, modification by surface coating, forming germanium-based alloys, and forming binary or ternary germanium-based composites. The recent work on a novel composite of germanium and tin particles encapsulated in double-concentric carbon hollow spheres is also presented here, with an emphasis on the relationship between structural design and improved performance.