The molten chlorides for aluminum-graphite rechargeable batteries
The molten chlorides for aluminum-graphite rechargeable batteries
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DOI：
10.1016/j.jallcom.2019.153285
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发表时间：
2020-04
影响因子：
6.2
通讯作者：
Jiguo Tu;Junxiang Wang;Hongmin Zhu;S. Jiao
中科院分区：
文献类型：
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作者：
Jiguo Tu;Junxiang Wang;Hongmin Zhu;S. Jiao
一种低成本、高容量的铝-石墨可充电铝离子电池被证实能够在四元AlCl 3-NaCl-LiCl-KCl无机熔盐作为电解质中稳定工作，其最低共晶温度小于75 °C。该电池在90 °C、200 mA g − 1、1500次循环时的稳定比容量为114.9 mAh g− 1。此外，在90 °C下，在2600次循环中，容量可以保持在800 mA g− 1的较高电流密度下的1085 mAh g− 1。重要的是，即使在80 °C和100 °C下循环，当温度回到90 °C时，在5800次循环后可以实现几乎100%的容量保持率，验证了在各种温度下优越的上级长期循环稳定性。固有的低成本和高容量以及出色的长期循环稳定性使其特别适合大型储能设备。
A low-cost, high-capacity Al-graphite rechargeable aluminum-ion battery is confirmed to be able to work stably in a quaternary AlCl3-NaCl-LiCl-KCl inorganic molten salt as electrolyte with the lowest eutectic temperature of less than 75 °C. The battery shows a stable specific capacity of 114.9 mAh g−1at 200 mA g−1over 1500 cycles at 90 °C. Moreover, the capacity can remain at ∼85 mAh g−1with a higher current density of 800 mA g−1over 2600 cycles at 90 °C. Importantly, even cycled at 80 °C and 100 °C, almost 100% capacity retention can be achieved after 5800 cycles when the temperature is back to 90 °C, verifying the superior long-term cycling stability under various temperatures. The inherent low-cost and high capacity, as well as outstanding long-term cycling stability, makes it particularly favorable for large-scale energy storage devices.