Reconciling Capacity Degradation for Sodium-Ion Pouch Cell by Practical Electrocatalytic-Driven Compensation Strategy.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41129294.
- Also identified by DOI 10.1021/acsnano.5c13260.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Irreversible active sodium loss (ASL) is widely regarded as a pivotal factor influencing the cycle life and energy density of sodium-ion full cells. Introducing practical electrocatalyst-driven compensation strategies for ASL and other multiple benefits in sodium-ion batteries (SIBs) is a tireless pursuit of researchers. Herein, Pd atoms were used to catalytically drive the decomposition of Na<sub>2</sub>O to compensate for ASL in Na<sub>3</sub>(Mn<sub>0.8</sub>Fe<sub>0.2</sub>)<sub>2</sub>(PO<sub>4</sub>)(P<sub>2</sub>O<sub>7</sub>)//hard carbon (NMFPP//HC) pouch cells. This compensation strategy not only replenished the sodium inventory loss caused by SEI and Mn<sup>2+</sup> shuttle effect but also constructed a NaF-rich rigid CEI layer. The dissolution and shuttling of Mn<sup>2+</sup> can be significantly inhibited by this kind of rigid NaF-CEI layer. Finally, incorporating 8 wt % currently modified precondition with NMFPP cathode, the energy density of the corresponding pouch cell (NMFPP-PNO//HC) presents an essential improvement of 29% relative to the unmodified system. This study proposes a universal approach for ASL compensation and electrode stabilization in the design of high-performance SIBs.