Publications by authors named "L Charlie Qie"
Stabilizing SPAN in Non-Flammable Acetonitrile Electrolytes for Long-Life Graphite||SPAN Batteries.
Angew Chem Int Ed Engl
December 2024
Sulfurized polyacrylonitrile (SPAN) presents an opportunity to replace elemental sulfur as a "shuttle-free" cathode for secondary Li-S batteries, which can be an ideal choice for stationary energy storage due to its abundance, low cost, and sustainability. The electrolyte options for the state-of-the-art SPAN batteries have been limited to the flammable carbonate and ether ones, which raises safety concerns. Here, we explored the use of a non-flammable acetonitrile (AN) electrolyte for SPAN battery for the first time and identified the irreversible cleavage of C-S bonds of SPAN as the main reason for the failure of SPAN in AN electrolyte.
View Article and Find Full Text PDFArticle Synopsis
- Anode-free lithium-metal batteries (AFBs) have high energy density but face rapid capacity loss due to instability in the solid-electrolyte interface (SEI) when using commercial carbonate electrolytes.
- The introduction of sacrificial additives, which are low in solubility and can be continuously released, helps form and maintain the SEI during long-term use, minimizing active lithium loss.
- With these additives, the AFBs achieved impressive capacity retention of 68.9% after 50 cycles, compared to a control cell that failed after 30 cycles, showcasing a promising strategy for improving the practicality of AFBs.
Diazirines are versatile carbene precursors that are extensively used in biological target identification experiments. However, their photo-activation wavelength ( 365 nm) precludes their use in living organisms. Here we show that a reconceptualization of the diazirine hybridization state leads to conjugation of the diazirine motif to longer-wavelength chromophores.
View Article and Find Full Text PDFThe utilization of thin zinc (Zn) anodes with a high depth of discharge is an effective strategy to increase the energy density of aqueous Zn metal batteries (ZMBs), but challenged by the poor reversibility of Zn electrode due to the serious Zn-consuming side reactions at the Zn||electrolyte interface. Here, we introduce 2-bromomethyl-1,3-dioxolane (BDOL) and methanol (MeOH) as electrolyte additive into aqueous ZnSO electrolyte. In the as-formulated electrolyte, BDOL with a strong electron-withdrawing group (-CHBr) tends to pair with the HO-Zn-MeOH complex, leading to the formation of organobromine-partnered HO-Zn-MeOH cluster ions.
View Article and Find Full Text PDFA Room-Temperature Lithium-Restocking Strategy for the Direct Reuse of Degraded LiFePO Electrodes.
Angew Chem Int Ed Engl
December 2024
Article Synopsis
- Efficient recycling of lithium iron phosphate (LFP) batteries is essential, but current methods involve complex processes that require multiple steps to regenerate spent LFP (SLFP) electrodes.
- Researchers have developed a new technique called direct electrode reuse (DER), which revitalizes SLFP electrodes in just 6 minutes using a specific lithium solution, restoring their structure and electrochemical performance.
- The DER method not only enhances the lifespan of LFP electrodes—achieving a high specific capacity even after 3 months—but also offers significant economic and environmental advantages over traditional recycling methods.