Large-Sized Few-Layer Graphene Enables an Ultrafast and Long-Life Aluminum-Ion Battery
Large-Sized Few-Layer Graphene Enables an Ultrafast and Long-Life Aluminum-Ion Battery
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大尺寸少层石墨烯可实现超快且长寿命的铝离子电池
DOI：
10.1002/aenm.201700034
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发表时间：
2017
影响因子：
27.8
通讯作者：
Liu Zhaoping
中科院分区：
文献类型：
--
作者：
Zhang Leyuan;Chen Liang;Luo Hao;Zhou Xufeng;Liu Zhaoping
开发高功率和高能量的长寿命电池仍然是一个巨大的挑战，即使结合金属（快速动力学和高容量）和碳材料（坚固的结构）的优点。其中，基于铝阳极和石墨碳阴极的铝离子电池作为最有前途的技术之一受到了广泛的关注。本文论证了石墨材料在平面和c方向上的尺寸在阴离子嵌入化学中起着重要作用。垂直尺寸（c方向）的急剧减小强烈促进了阴离子嵌入（脱嵌）的动力学和电荷转移。另一方面，增加水平尺寸（abplane）的大小有助于提高石墨材料的柔韧性，从而提高循环稳定性。同时，氯铝酸阴离子可逆地插入石墨材料的层间，导致石墨材料的分级行为。最后，基于大尺寸的几层石墨烯作为阴极和铝金属作为阳极，实现了具有超长寿命的超快铝离子电池。
To develop high‐power and high‐energy batteries with a long life remains a great challenge, even combining the benefits of metal (fast kinetics and high capacity) and carbon materials (robust structure). Among them, Al‐ion batteries based on aluminum anode and graphite carbon cathode have gained lots of interests as one of the most promising technologies. Here, it is demonstrated that the size of graphitic material inabplane andcdirection plays an important role in anion intercalation chemistry. Sharply decreasing the size of vertical dimension (cdirection) strongly facilitates the kinetics and charge transfer of anions (de)intercalation. On the other hand, increasing the size of horizontal dimension (abplane) contributes to improving the flexibility of graphitic materials, which results in raising the cycling stability. Meanwhile, chloroaluminate anions are reversibly intercalated into the interlayer of graphite materials, leading to the staging behaviors. In the end, an ultrafast Al‐ion battery with exceptional long life is achieved based on large‐sized few‐layer graphene as a cathode and aluminum metal as an anode.