材料科学
阳极
石墨烯
电流密度
锂(药物)
离子
复合数
纳米结构
硅
氧化物
纳米技术
导电体
储能
化学工程
光电子学
复合材料
电极
有机化学
冶金
化学
内分泌学
量子力学
物理化学
物理
功率(物理)
医学
工程类
作者
Fucong Lyu,Zhifang Sun,Bo Nan,Sicen Yu,Lujie Cao,Mingyang Yang,Minchan Li,Wenxi Wang,Shaofei Wu,Shanshan Zeng,Hongtao Liu,Zhouguang Lu
标识
DOI:10.1021/acsami.7b00460
摘要
Si-based nanostructure composites have been intensively investigated as anode materials for next-generation lithium-ion batteries because of their ultra-high-energy storage capacity. However, it is still a great challenge to fabricate a perfect structure satisfying all the requirements of good electrical conductivity, robust matrix for buffering large volume expansion, and intact linkage of Si particles upon long-term cycling. Here, we report a novel design of Si-based multicomponent three-dimensional (3D) networks in which the Si core is capped with phytic acid shell layers through a facile high-energy ball-milling method. By mixing the functional Si with graphene oxide and functionalized carbon nanotube, we successfully obtained a homogeneous and conductive rigid silicon-based gel through complexation. Interestingly, this Si-based gel with a fancy 3D cross-linking structure could be writable and printable. In particular, this Si-based gel composite delivers a moderate specific capacity of 2711 mA h g-1 at a current density of 420 mA g-1 and retained a competitive discharge capacity of more than 800.00 mA h g-1 at the current density of 420 mA g-1 after 700 cycles. We provide a new method to fabricate durable Si-based anode material for next-generation high-performance lithium-ion batteries.
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