Nonmetal Current Collectors: The Key Component for High-Energy-Density Aluminum Batteries.,Advanced Materials

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Nonmetal Current Collectors: The Key Component for High-Energy-Density Aluminum Batteries.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-09-04 , DOI: 10.1002/adma.202001212
Li-Li Chen _{1,

2,

3} , Wei-Li Song _{1,

2} , Na Li _{1,

2} , Handong Jiao _{1,

2} , Xue Han _{1,

2} , Yiwa Luo ₄ , Mingyong Wang ₄ , Haosen Chen _{1,

2} , Shuqiang Jiao _{1,

2,

4} , Daining Fang _{1,

2}

Affiliation

As one of the emerging safe energy‐storage devices with high energy‐to‐cost ratio, nonaqueous aluminum batteries with enhanced energy density are intensively pursued by researchers. Although significant progress has been made on positive electrode materials, the effective energy density of aluminum batteries is still limited by the presence of high‐density refractory metal current collectors, which are known to be electrochemically inert in highly acidic ionic‐liquid electrolytes. To address such critical issues, here, a novel low‐density (<2 g cm⁻³) nonmetal current collector is presented, which uses poly(ethylene terephthalate) (PET) substrates coated with indium tin oxide (ITO), with the purpose of significantly reducing the ratio of nonactive components in the electrodes. In addition to the excellent chemical and electrochemical stability (with voltage as high as ≈2.75 V vs Al³⁺/Al), this nonmetal current collector, also encompassing a carboxymethyl cellulose (CMC) binder, allows as‐assembled pouch cells to deliver a reversible specific capacity of ≈120 mAh g⁻¹ at a current density of 50 mA g⁻¹. In comparison with the high‐density refractory metal Mo or Ta current collectors, these nonmetal current collectors offer a novel strategy for constructing high‐energy‐density aluminum batteries by substituting the key components, with the aim of boosting the energy density of nonaqueous aluminum batteries.

中文翻译：

非金属集电器：高能量密度铝电池的关键组件。

作为新兴的具有高能量成本比的安全储能设备之一，研究人员一直在追求具有更高能量密度的非水铝电池。尽管在正极材料方面取得了重大进展，但铝电池的有效能量密度仍然受到高密度难熔金属集流体的限制，该集流体在高酸性离子液体电解质中具有电化学惰性。为了解决这些关键问题，这里提出了一种新颖的低密度（<2 g cm ^-3）提出了一种非金属集电器，该集电器使用涂有氧化铟锡（ITO）的聚对苯二甲酸乙二醇酯（PET）基底，目的是显着降低电极中非活性成分的比例。除了出色的化学和电化学稳定性（电压相对于Al ³⁺ / Al高达≈2.75V ）之外，这种非金属集电器还包含羧甲基纤维素（CMC）粘合剂，可让组装后的袋式电池提供≈120毫安克可逆比容量^-1在50mA g的电流密度^-1。与高密度耐火金属Mo或Ta集电器相比，这些非金属集电器通过替代关键部件为构建高能量密度铝电池提供了一种新颖的策略，目的是提高非水铝电池的能量密度。

更新日期：2020-10-20

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