High-capacity anode materials such as silicon provide at least ten times the capacitance of conventional graphite anodes. However, the volumetric expansion of these materials during reaction with lithium can pose a threat to battery performance and stability.
To solve this problem, the team replaced the graphite with a silicon anode and used charged layered polymers that leverage Coulomb’s Law to effectively bond to the anode. The resulting polymer provides a stable and reliable capacity ten times higher than conventional graphite anodes.
The study could greatly improve the energy density of lithium-ion batteries, thereby increasing the range of electric vehicles.
Source: Ferra
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