材料科学
阳极
石墨烯
锂(药物)
碳纤维
硅
纳米技术
导电体
电极
电导率
复合数
化学工程
光电子学
复合材料
医学
工程类
内分泌学
物理化学
化学
作者
Tiantian Fang,Hui-Bin Liu,Xinyu Luo,Ning Gong,Mengru Sun,WenChao Peng,Yang Li,Fengbao Zhang,Xiaobin Fan
标识
DOI:10.1021/acsami.2c13824
摘要
Silicon oxides (SiOx) are one of the most promising anode materials for next-generation lithium-ion batteries owing to their abundant reserve and low lost and high reversible capacity. However, the practical application of SiOx is still hindered by their intrinsically low conductivity and huge volume change. In this regard, we design a novel anode material in which sheet-like SiOx nanosheets are encapsulated in a unique point-to-plane conductive network composed of graphene flakes and nitrogen-doped carbon spheres. This unique composite structure demonstrates high specific capacity (867.7 mAh g–1 at 0.1 A g–1), superior rate performance, and stable cycle life. The electrode delivers a superior reversible discharge capacity of 595.8 mAh g–1 after 200 cycles at 1.0 A g–1 and 287.5 mAh g–1 after 500 cycles at 5.0 A g–1. This work may shed light on the rational design of SiOx-based anode materials for next-generation high-performance lithium-ion batteries.
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