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์—๋„ˆ์ง€์‹ ์†Œ์žฌ๊ณตํ•™๊ณผ ๊น€ํ˜„์„ ๊ต์ˆ˜ํŒ€, ์ฐจ์„ธ๋Œ€ ๊ณ ์„ฑ๋Šฅ ๋ฐ•๋ง‰ ๋ฆฌํŠฌ์ด์˜จ์ „์ง€ ๊ฐœ๋ฐœ ์„ฑ๊ณผ ๋ฐœํ‘œ

๋“ฑ๋ก์ผ 2025.08.25. ์กฐํšŒ 882

- ‘๋ฐ•๋ง‰ ์ „์ง€์˜ ๊ณ„๋ฉด ์•ˆ์ •ํ™” ๋ฐ ๊ณ ์—๋„ˆ์ง€ํ™”’ ๋™์‹œ ํ•ด๊ฒฐ
- ์ฐจ์„ธ๋Œ€ ์†Œํ˜• ์ „์ž๊ธฐ๊ธฐ ๋ฐ ์ „๊ณ ์ฒด ๋ฐฐํ„ฐ๋ฆฌ ์ƒ์šฉํ™”์— ‘ํ•œ ๊ฑธ์Œ ๋”’

 

๊น€ํ˜„์„ ๊ต์ˆ˜


๋™๊ตญ๋Œถฤว๊™๊ต(์ด์žฅ ์œค์žฌ์›…) ๊ณต๊ณผ๋Œถฤว๊™ ์—๋„ˆ์ง€์‹ ์†Œ์žฌ๊ณตํ•™๊ณผ ๊น€ํ˜„์„ ๊ต์ˆ˜ ์—ฐ๊ตฌํŒ€์ด ์ฐจ์„ธ๋Œ€ ๊ณ ์„ฑ๋Šฅ ๋ฐ•๋ง‰ ๋ฆฌํŠฌ์ด์˜จ์ „์ง€ ๊ฐœ๋ฐœ ์„ฑ๊ณผ๋ฅผ ์„ธ๊ณ„์ ์œผ๋กœ ๊ถŒ์œ„ ์žˆ๋Š” ํ•™์ˆ ์ง€ Chemical Engineering Journal (IF: 13.2)๊ณผ Journal of Materials Chemistry A (IF: 9.5)์— ์—ฐ์ด์–ด ๋ฐœํ‘œํ–ˆ๋‹ค. ๊น€ํ˜„์„ ๊ต์ˆ˜ํŒ€์˜ ์ด๋ฒˆ ์„ฑ๊ณผ๋Š” '๋ฐ•๋ง‰ ์ „์ง€์˜ ๊ณ„๋ฉด ์•ˆ์ •ํ™”์™€ ๊ณ ์—๋„ˆ์ง€ํ™”'๋ผ๋Š” ๋‘ ๊ฐ€์ง€ ํ•ต์‹ฌ ๊ณผ์ œ๋ฅผ ๋™์‹œ์— ํ•ด๊ฒฐํ•˜๋ฉฐ, ์ฐจ์„ธ๋Œ€ ์†Œํ˜• ์ „์ž๊ธฐ๊ธฐ ๋ฐ ์ „๊ณ ์ฒด ๋ฐฐํ„ฐ๋ฆฌ ์ƒ์šฉํ™”์— ํ•œ ๊ฑธ์Œ ๋” ๋‹ค๊ฐ€์„  ์—ฐ๊ตฌ๋กœ ํ‰๊ฐ€๋ฐ›๊ณ  ์žˆ๋‹ค.

 

์ฒซ ๋ฒˆ์งธ ์„ฑ๊ณผ๋Š” Chemical Engineering Journal์— ๊ฒŒ์žฌ๋œ “Pioneering Energy Storage Using Facing-Target Sputtered Al2O3 Protection Layer on Ni-Rich NCM622 Cathode for High-Efficiency All-Solid-State Thin-Film Batteries” ์—ฐ๊ตฌ๋‹ค. ์—ฐ๊ตฌํŒ€์€ ํŽ˜์ด์‹ฑ ํƒ€๊ฒŸ ์Šคํผํ„ฐ๋ง(Facing-Target Sputtering, FTS) ๊ธฐ์ˆ ์„ ์ด์šฉํ•ด ๋‘๊ป˜ ์•ฝ 1nm์˜ Al2O3 ๋ณดํ˜ธ๋ง‰์„ NCM622 ๋ฐ•๋ง‰ ์–‘๊ทน ํ‘œ๋ฉด์— ์ฆ์ฐฉํ•˜์—ฌ ์–‘๊ทน–์ „ํ•ด์งˆ ๊ณ„๋ฉด์„ ์•ˆ์ •ํ™”ํ–ˆ๋‹ค.

 

์ด ๋ฐฉ๋ฒ•์€ ๊ธฐ์กด์— ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๋Š” ํ”Œ๋ผ์ฆˆ๋งˆ ๊ธฐ๋ฐ˜ ์›์ž์ธต ์ฆ์ฐฉ(PEALD) ๋Œ€๋น„ ํ”Œ๋ผ์ฆˆ๋งˆ ์†์ƒ์„ ๋ฐฉ์ง€ํ•˜๊ณ , ๋”์šฑ ์น˜๋ฐ€ํ•˜๊ณ  ๊ท ์ผํ•œ ์ฝ”ํŒ…์ธต ํ˜•์„ฑ์ด ๊ฐ€๋Šฅํ•˜๋‹ค. ๊ทธ ๊ฒฐ๊ณผ, ์•ก์ฒด ์ „ํ•ด์งˆ ์…€์—์„œ 400์‚ฌ์ดํด ํ›„์—๋„ 91%์˜ ์šฉ๋Ÿ‰์„ ์œ ์ง€ํ–ˆ๊ณ , LiPON ๊ณ ์ฒด ์ „ํ•ด์งˆ์„ ์ ์šฉํ•œ ์ „๊ณ ์ฒด ๋ฐ•๋ง‰ ์ „์ง€์—์„œ๋Š” 50.98 mWh/cm3์˜ ์—๋„ˆ์ง€ ๋ฐ€๋„๋ฅผ ๋‹ฌ์„ฑํ–ˆ๋‹ค. ๊น€ ๊ต์ˆ˜๋Š” “์†์ƒ ์—†๋Š” Al2O3 ์ฝ”ํŒ… ๊ธฐ์ˆ ์ด ๊ณ ์„ฑ๋Šฅ·๊ณ ๋‚ด๊ตฌ์„ฑ ์ „๊ณ ์ฒด ๋ฐ•๋ง‰ ์ „์ง€ ๊ตฌํ˜„์— ํšจ๊ณผ์ ์ž„์„ ์ž…์ฆํ–ˆ๋‹ค”๋ฉฐ, IoT ๊ธฐ๊ธฐ, ์˜๋ฃŒ์šฉ ์ž„ํ”Œ๋ž€ํŠธ, ๋ฐฉ์‚ฐ ์ „์ž๊ธฐ๊ธฐ ๋“ฑ ์ฐจ์„ธ๋Œ€ ์†Œํ˜• ์ „์ž๊ธฐ๊ธฐ ์ „์› ๊ณต๊ธ‰์— ์ƒˆ๋กœ์šด ๊ฐ€๋Šฅ์„ฑ์„ ์—ด์—ˆ๋‹ค๊ณ  ๋ฐํ˜”๋‹ค.

 

๋‘ ๋ฒˆ์งธ ์„ฑ๊ณผ๋Š” Journal of Materials Chemistry A์— ์‹ค๋ฆฐ “Optimization of thin-film Li1.0Ni0.6Co0.2Mn0.2 cathode enabled by rapid thermal processing in oxygen-rich environments for superior performance” ์—ฐ๊ตฌ๋‹ค. ๋™๊ตญ๋Œ€, ๊ฑด๊ตญ๋Œ€, ํ˜„๋Œ€์ž๋™์ฐจ๋กœ ๊ตฌ์„ฑ๋œ ๊ณต๋™ ์—ฐ๊ตฌํŒ€์€ RF ๋งˆ๊ทธ๋„คํŠธ๋ก  ์Šคํผํ„ฐ๋ง์œผ๋กœ NCM622 ๋ฐ•๋ง‰ ์–‘๊ทน์„ ์ œ์ž‘ํ•œ ๋’ค, ์‚ฐ์†Œ ๋†๋„๊ฐ€ ๋†’์€ ํ™˜๊ฒฝ์—์„œ 600โ„ƒ ๊ธ‰์† ์—ด์ฒ˜๋ฆฌ(RTA)๋ฅผ ์ ์šฉํ•ด Pt hillock ํ˜•์„ฑ ์–ต์ œ, ๋ฏธ์„ธ๊ท ์—ด ์ตœ์†Œํ™”, ์–‘๊ทน–์ „ํ•ด์งˆ ๊ณ„๋ฉด ์•ˆ์ •์„ฑ ํ–ฅ์ƒ ๋“ฑ์„ ์ด๋ค„๋ƒˆ๋‹ค.

 

์—ฐ๊ตฌ ๊ฒฐ๊ณผ, 646.8 mAh/cm3์˜ ๋†’์€ ๋ถ€ํ”ผ ์šฉ๋Ÿ‰๊ณผ 100์‚ฌ์ดํด ํ›„ 81.06%์˜ ์šฉ๋Ÿ‰ ์œ ์ง€์œจ์„ ๊ธฐ๋กํ–ˆ์œผ๋ฉฐ, ์‹ค๋ฆฌ์ฝ˜ ๋ฐ•๋ง‰ ์Œ๊ทน๊ณผ์˜ full-cell ๊ตฌ์„ฑ์—์„œ๋„ 50์‚ฌ์ดํด ํ›„ 80.4% ์šฉ๋Ÿ‰์„ ์œ ์ง€ํ•ด, IoT ์ „์ž๊ธฐ๊ธฐ ๋ฐ ์˜๋ฃŒ ์ž„ํ”Œ๋ž€ํŠธ ๋“ฑ ์†Œํ˜•ํ™” ๋ฐฐํ„ฐ๋ฆฌ ์‘์šฉ ๊ฐ€๋Šฅ์„ฑ์„ ์ž…์ฆํ–ˆ๋‹ค. ๊น€ ๊ต์ˆ˜๋Š” “์‚ฐ์†Œ ํ™˜๊ฒฝ์—์„œ์˜ ๊ธ‰์† ์—ด์ฒ˜๋ฆฌ๋Š” ์ฐจ์„ธ๋Œ€ ๋ฐ•๋ง‰ ๋ฆฌํŠฌ์ด์˜จ์ „์ง€์˜ ์•ˆ์ •์„ฑ๊ณผ ๊ณ ์—๋„ˆ์ง€ ๋ฐ€๋„๋ฅผ ๋™์‹œ์— ํ™•๋ณดํ•  ์ˆ˜ ์žˆ๋Š” ํ™•์žฅ์„ฑ ์žˆ๋Š” ๊ณต์ • ์ „๋žต”์ด๋ผ๊ณ  ๊ฐ•์กฐํ–ˆ๋‹ค.