Unique Structural Design and Strategies for Germanium‐Based Anode Materials Toward Enhanced Lithium Storage. Issue 23 (8th June 2017)

• Record Type: Journal Article
• Authors: Li, Dan; Wang, Hongqiang; Zhou, Tengfei; Zhang, Wenchao; Liu, Hua Kun; Guo, Zaiping
• Is Part Of: Advanced energy materials. Volume 7:Issue 23(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-06-08
• Subjects: anode materials -- germanium -- lithium‐ion batteries -- structural design; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201700488
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: 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. Abstract : Germanium‐based anode materials for lithium ion batteries are usually modified by structural design and strategies to prevent the agglomeration of nanoparticles, buffer/accommodate volume expansion during lithiation, and provide good electrical conductivity, thereby improving the electrochemical performance. Here, a comprehensive summary of the fabrication and strategies of diverse Ge‐based materials and a unique Sn@C@Ge@C double‐shell carbon architecture are provided.