Extremely fast-charging lithium ion battery enabled by dual-gradient structure design.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35486719.
- Also identified by DOI 10.1126/sciadv.abm6624 and PMC identifier 9054020.
- Licence recorded as CC BY-NC.
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Abstract
Extremely fast-charging lithium-ion batteries are highly desirable to shorten the recharging time for electric vehicles, but it is hampered by the poor rate capability of graphite anodes. Here, we present a previously unreported particle size and electrode porosity dual-gradient structure design in the graphite anode for achieving extremely fast-charging lithium ion battery under strict electrode conditions. We develop a polymer binder-free slurry route to construct this previously unreported type particle size-porosity dual-gradient structure in the practical graphite anode showing the extremely fast-charging capability with 60% of recharge in 10 min. On the basis of dual-gradient graphite anode, we demonstrate extremely fast-charging lithium ion battery realizing 60% recharge in 6 min and high volumetric energy density of 701 Wh liter<sup>-1</sup> at the high charging rate of 6 C.