US Army Aims High Capacity Energy Storage
Author: Source: Datetime: 2018-06-15 12:21:02
Earlier this week, CleanTechnica made a case that we are entering the nickel era, but maybe we speak too quickly. The new Brookhaven lithium-ion battery has superior performance due to the age of iron or iron trifluoride.
In general, when the topic shifts to energy storage and in particular increases the capacity of lithium-ion batteries, iron trifluoride generally does not pop up and there is a reason. Here is an interpreter's lab:
This compound has historically been ineffective in lithium-ion batteries due to three complications of its conversion reaction: poor energy efficiency (hysteresis), slow reaction times, and side reactions that can lead to short cycle life.
In other words, the battery is not particularly rechargeable. This sounds like a hopeless case, but on the other hand, iron trifluoride is relatively inexpensive and non-toxic. Bruker Hai’s cultural scientist and chief researcher, Enyuan Hu, offers another reason for pursuing more and better energy storage:
The materials commonly used in lithium-ion batteries are based on intercalation chemistry. This chemical reaction is very effective; however, it transfers only one electron, so the cathode capacity is limited. Some compounds, such as FeF3, can transfer multiple electrons through a more complex reaction mechanism called a conversion reaction.
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