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Continued Increase In Publications On Si Anode. Mechanism Disclosed For Si Anode In Ssb As One Of The 2024 Highlights GENERAL TREND
PROGRESS HIGHLIGHT Rapid growth of the solid electrolyte interphase (SEI) at the Si|Li6PS5Cl interface causes large increases in resistance of the composite anodes, leading to rapid capacity decay.
WOS Publication
Pure silicon anodes without intermixed solid electrolyte demonstrate sufficient ionic and electronic conductivities, enabling high specific capacity.
In the past 10 years, the number of research publications with “Si anode, lithium-ion battery” as key words has increased by 96.3% (from 489 to 960), suggesting continued interested in the area
2D AND 3D SI|LPSCL INTERFACES
PROS AND CONS:
High theoretical specific capacity (3590 mAh/g, Li3.75Si at RT), low lithiation potential and low lithium dendrite risk (only 0.3 V vs. Li+/Li)
Severe volume expansion during lithiation leads to Si particle pulverization and continuous SEI formation Source: Web of Science, Nat. Mater. 23, 543-551 (2024))
SI|LPSCL|NCM@LBO FULL CELLS
Microscale void formation during delithiation causes larger mechanical stress at the 2D interfaces of these pure silicon anodes compared to the interconnected 3D interfaces of the silicon anode/ solid electrolyte composite.
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