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6 FAQs about [Battery sintering technical requirements]
What are the different sintering techniques?
Several advanced sintering techniques for solid electrolytes include hot pressing, field-assisted sintering, flash sintering, microwave sintering, and spark plasma sintering.
What are the side-effects of high-temperature sintering?
High-temperature sintering, in the context of the 「cold sintering process」, has two detrimental side-effects: lithium loss and secondary phase formation. To counteract the lithium loss, advanced sintering techniques such as spark plasma sintering have been developed.
Why is liquid phase sintering preferred during solid electrolyte preparation?
During solid electrolyte preparation, liquid phase sintering is preferred because of its simplicity and effectiveness in reducing the sintering temperature. This process involves the emergence of liquid-phases during the sintering process, which is beneficial for mass transport and particle compaction.
How does the cold sintering process work?
The cold sintering process involves the first step being the densification stage, where loosely-packed powders are compacted with the assistance of a liquid phase. According to the proposed mechanism, this step includes particle rearrangement, sliding of powders under fluid mechanics, and grain boundary creep.
How does cold sintering affect the conductivity of solid-state electrolytes?
For solid-state electrolytes, the effect of cold sintering on their conductivity is to increase the resistance at the grain boundaries. High-temperature treatment is typically used to enhance the interconnectivity between grains and minimize this effect.
Why is calcination and sintering important in cathode manufacturing?
Within cathode manufacturing, the calcination and sintering process is a vital step for securing a high-quality cathode powder. With demand for lithium-ion batteries continuously growing, the challenge for manufacturers is to find ways to increase and maintain high production rates.