SiOx Encapsulated in Graphene Bubble Film: An Ultrastable Li‐Ion Battery Anode,Advanced Materials

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SiOx Encapsulated in Graphene Bubble Film: An Ultrastable Li‐Ion Battery Anode
Advanced Materials ( IF 27.4 ) Pub Date : 2018-05-10 , DOI: 10.1002/adma.201707430
Quan Xu _{1,

2} , Jian‐Kun Sun _{1,

2} , Zhi‐Long Yu ₃ , Ya‐Xia Yin _{1,

2} , Sen Xin ₁ , Shu‐Hong Yu ₃ , Yu‐Guo Guo _{1,

2}

Affiliation

SiO_x is proposed as one of the most promising anodes for Li‐ion batteries (LIBs) for its advantageous capacity and stable Li uptake/release electrochemistry, yet its practical application is still a big challenge. Here encapsulation of SiO_x nanoparticles into conductive graphene bubble film via a facile and scalable self‐assembly in solution is shown. The SiO_x nanoparticles are closely wrapped in multilayered graphene to reconstruct a flake‐graphite‐like macrostructure, which promises uniform and agglomeration‐free distribution of SiO_x in the carbon while ensures a high mechanical strength and a high tap density of the composite. The composites present unprecedented cycling stability and excellent rate capabilities upon Li storage, rendering an opportunity for its anode use in the next‐generation high‐energy LIBs.

中文翻译：

封装在石墨烯气泡膜中的SiOx：超稳定锂离子电池阳极

SiO _x具有优越的容量和稳定的锂吸收/释放电化学性能，被认为是锂离子电池（LIBs）最有希望的阳极之一，但其实际应用仍然是一个巨大的挑战。此处显示了通过在溶液中的简便且可扩展的自组装将SiO _x纳米颗粒封装到导电石墨烯气泡膜中的过程。SiO _x纳米颗粒紧密包裹在多层石墨烯中，以重建片状石墨状的宏观结构，从而保证了SiO _x均匀且无团聚的分布同时确保碳的高机械强度和高振实密度。这种复合材料在储存锂时表现出空前的循环稳定性和出色的倍率性能，为阳极用于下一代高能锂电池提供了机会。

更新日期：2018-05-10

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