摘要
纳米石墨化碳因其优异的导电、导热及力学性能近年来备受重视,并在锂离子电池体系中得到广泛运用。纳米石墨化碳具有的优异电学性能及纳米尺度结构特征使其在解决锂离子电池中高导电性、导热性、充放电过程中的柔性及结构稳定性等方面发挥了重要作用。本文综述了近年来纳米石墨化碳在锂离子电池应用中的最新进展和研究热点,包括纳米石墨化碳在锂离子电池中直接充当高容量负极材料,纳米石墨化碳作为高性能骨架材料为电极提供导电及力学网络,与硅、金属氧化物等高容量电极材料复合形成同轴、核壳等结构的高容量电极材料甚至柔性电极等。如何进一步认识纳米石墨化碳储锂机制,发展其精确可控制备科学和工程技术,进而在三维尺度上构建高效的锂离子电池电极材料结构仍是未来的重点研究方向。
sp2 Nanocarbon materials have attracted great interests in recent years due to their superior electrical,thermal and mechanical properties.Such properties are highly desirable for forming high performance electrodes and,as a result,the materials have found wide applications in lithium ion batteries.This paper provides a state-ofthe-art review of the applications of sp 2 nanocarbons in lithium ion batteries.Particular attention is drawn on the use of sp 2 nanocarbon as a high-capacity anode material and a highly electrically conductive,structurally strong and even flexible framework in which other electrode materials(e.g.silicon and metal oxides)can be incorporated to form coaxial or core-shell composites.It is concluded that further understanding of lithium ion storage mechanisms in sp 2 nanocarbon,controllable and scalable synthesis of the material,and methodologies for constructing threedimensional sp 2 nanocarbon electrodes with a high performance are among the most important aspects for future research.
出处
《储能科学与技术》
CAS
2012年第1期1-12,共12页
Energy Storage Science and Technology
基金
国家重点基础研究发展计划(973)项目(2011CB932602)
关键词
纳米石墨化碳
锂离子电池
导电性
柔性
结构稳定性
sp2 nanocarbon
lithium ion batteries
electrical conductivity
fexibility
structural stability
