Paving the Path toward Reliable Cathode Materials for Aluminum‐Ion Batteries,Advanced Materials

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Paving the Path toward Reliable Cathode Materials for Aluminum‐Ion Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2019-02-15 , DOI: 10.1002/adma.201806510
Feng Wu ₁ , Haoyi Yang ₁ , Ying Bai ₁ , Chuan Wu ₁

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Aluminum metal is a high‐energy‐density carrier with low cost, and thus endows rechargeable aluminum batteries (RABs) with the potential to act as an inexpensive and efficient electrochemical device, so as to supplement the increasing demand for energy storage and conversion. Despite the enticing aspects regarding cost and energy density, the poor reversibility of electrodes has limited the pursuit of RABs for a long time. Fortunately, ionic‐liquid electrolytes enable reversible aluminum plating/stripping at room temperature, and they lay the very foundation of RABs. In order to integrate with the aluminum‐metal anode, the selection of the cathode is pivotal, but is limited at present. The scant option of a reliable cathode can be accounted for by the intrinsic high charge density of Al³⁺ ions, which results in sluggish diffusion. Hence, reliable cathode materials are a key challenge of burgeoning RABs. Herein, the main focus is on the insertion cathodes for RABs also termed aluminum‐ion batteries, and the recent progress and optimization methods are summarized. Finally, an outlook is presented to navigate the possible future work.

中文翻译：

为铝离子电池的可靠阴极材料铺平道路

铝金属是一种低成本的高能量密度载体，因此赋予可充电铝电池（RAB）潜在的廉价和高效的电化学性能，以补充对能量存储和转换日益增长的需求。尽管在成本和能量密度方面具有诱人的方面，但是电极的可逆性差，长期以来一直限制了对RAB的追求。幸运的是，离子液体电解质可在室温下实现可逆的铝电镀/剥离，这为RAB奠定了基础。为了与铝金属阳极集成在一起，阴极的选择至关重要，但目前受到限制。Al ³⁺固有的高电荷密度可以说明可靠阴极的选择不足离子，导致扩散缓慢。因此，可靠的阴极材料是RAB迅速发展的关键挑战。在此，主要关注于RAB的插入阴极，也称为铝离子电池，并总结了最近的进展和优化方法。最后，提出了展望，以指导可能的未来工作。

更新日期：2019-02-15

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