By: Eddy Anaya
September 25, 2014
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| Source: Felice Frankel. http://www.nature.com/news/liquid-metal- batteries-get-boost-from-molten-lead-1.15967 |
Researchers have developed a battery in which the
negative (lithium), positive (antimony-lead), and the electrolyte (molten salt)
are all liquid. These liquids distribute themselves into three layers and that
separate based on their density. The advantage of having an all-liquid battery
is that it has a higher current density, longer cycle life, and simpler
manufacturing of large-scale storage systems. These batteries are meant for
stationary storage applications such as the storage of electricity produced by
wind and solar renewable energy technologies. They found that the high voltage
and low-melting point of antimony mixed with the low cost of lead decreases the
battery operating temperature and maintains the high cell voltage. The battery
shows high durability and maintains a 94% charge capacity after 450
charge-discharge cycles. A major disadvantage is that mining for the required
metals generates environmental pollution because of the chemicals used for the
mining process and the disposal of the leftover mine tailing.
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| Source: Wang, K. et al. 2014. |
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