AI Article Synopsis
- High-voltage lithium metal batteries (HV-LMBs) are seen as a key solution for high energy density storage, but existing electrolytes struggle to stabilize both the lithium anode and high-voltage cathodes efficiently.* -
- A new dual-interphase-stabilizing electrolyte is introduced that eliminates the need for expensive Li salts, using a sulfolane solvent and specially designed additives to create stable protective layers for both the anode and cathode.* -
- Testing shows that cells with this electrolyte can last over 500 cycles and deliver a high energy density of 435 Wh/kg, making it a promising option for safer and more cost-effective large-scale battery applications.*
Article Abstract
High-voltage Li metal battery (HV-LMB) is one of the most promising energy storage technologies to achieve ultrahigh energy density. Nevertheless, electrolytes reported to date are difficult to simultaneously stabilize the Li metal anode and high-voltage cathode, especially without the assistance of expensive and corrosive high-concentration Li salts. Herein, a dual-interphase-stabilizing (DIS) and safe electrolyte that bypasses the high-concentration Li salt is reported. The electrolyte consists of high-flash-point sulfolane as solvent, molecular-orbital-engineered additives that enable stable B-F rich cathodic interphase, and unique C-F rich organic anodic interphase. The stable cycling of both Li metal anode and 4.75 V-LiCoO cathode in the DIS electrolyte (> 500 cycles) is demonstrated. HV-LMB pouch cells of a high energy density (435 Wh kg) can sustainably operate for more than 100 cycles. Moreover, the low cost and high thermal stability of the DIS electrolyte offer superior cost-effectiveness and safety for large-scale applications of HV-LMBs in the future.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11600293 | PMC |
| http://dx.doi.org/10.1002/advs.202410129 | DOI Listing |
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