1. Toward practical all-solid-state lithium-ion batteries with high energy density and safety: Comparative study for electrodes fabricated by dry- and slurry-mixing processes.
- Author
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Nam, Young Jin, Oh, Dae Yang, Jung, Sung Hoo, and Jung, Yoon Seok
- Subjects
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ENERGY density , *LITHIUM-ion batteries , *SLURRY , *SUPERIONIC conductors , *ELECTRODES , *ELECTRIC vehicle batteries - Abstract
Owing to their potential for greater safety, higher energy density, and scalable fabrication, bulk-type all-solid-state lithium-ion batteries (ASLBs) employing deformable sulfide superionic conductors are considered highly promising for applications in battery electric vehicles. While fabrication of sheet-type electrodes is imperative from the practical point of view, reports on relevant research are scarce. This might be attributable to issues that complicate the slurry-based fabrication process and/or issues with ionic contacts and percolation. In this work, we systematically investigate the electrochemical performance of conventional dry-mixed electrodes and wet-slurry fabricated electrodes for ASLBs, by varying the different fractions of solid electrolytes and the mass loading. This information calls for a need to develop well-designed electrodes with better ionic contacts and to improve the ionic conductivity of solid electrolytes. As a scalable proof-of-concept to achieve better ionic contacts, a premixing process for active materials and solid electrolytes is demonstrated to significantly improve electrochemical performance. Pouch-type 80 × 60 mm 2 all-solid-state LiNi 0 · 6 Co 0 · 2 Mn 0 · 2 O 2 /graphite full-cells fabricated by the slurry process show high cell-based energy density (184 W h kg −1 and 432 W h L −1 ). For the first time, their excellent safety is also demonstrated by simple tests (cutting with scissors and heating at 110 °C). [ABSTRACT FROM AUTHOR]
- Published
- 2018
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