Dual-ion batteries (DIBs) are emerging energy storage devices with the unique energy storage mechanism in which both anions and cations are involved during charge-discharge processes. Graphite is usually used as both cathode and anode in DIBs, however, the limited layer spacing and the elongated diffusion channels make the ion migration resistance larger. To break the bottleneck, a strategy is proposed by incorporating AlCl₃ into the layer of graphite, which increases the layer spacing while acting as a pillar to stabilize the structure. In addition, a significant fraction of defects is inducted at the edges of the folds of graphite. This engineering accelerates the electron/ion transport on the stable graphite stacking microstructure. As a result, it could be used as both cation and anion insertion host in DIBs. Electrochemical tests showed that AlCl₃-GICs-5 materials could deliver a Li⁺ storage capacity of 169.1 mAh g⁻¹ at 2A g⁻¹ when cycles consistently for over 500 cycles which is much higher than graphite (60.7 mAh g⁻¹). Furthermore, when used as a PF₆⁻ insertion cathode in a DIB, it showed a high specific capacity of 100.8 mAh g⁻¹at 100 mA g⁻¹. This research is anticipated to provide inspiration to design new materials for DIBs.

双离子电池（DIB）是一种新兴的储能装置，具有独特的储能机制，在充放电过程中阴离子和阳离子都参与其中。石墨通常用作DIB中的阴极和阳极，然而，有限的层间距和拉长的扩散通道使得离子迁移阻力较大。为了打破这一瓶颈，提出了一种通过掺入AlCl _{3 的策略}进入石墨层，这增加了层间距，同时充当稳定结构的支柱。此外，很大一部分缺陷是在石墨折叠边缘产生的。该工程加速了稳定石墨堆叠微观结构上的电子/离子传输。因此，它可以用作 DIB 中的阳离子和阴离子插入宿主。电化学测试表明，当连续循环超过500次时，AlCl ₃ -GICs-5材料在2A g ^-1下可提供169.1 mAh g ^-1的Li ⁺存储容量，远高于石墨（60.7 mAh g ^-1）。此外，当用作 PF ₆ ^-将正极插入DIB中，在100 mA g ^{-1时表现出100.8 mAh g -1}的高比容量。这项研究预计将为 DIB 的新材料设计提供灵感。