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Breaking solvation ...
Breaking solvation dominance of ethylene carbonate via molecular charge engineering enables lower temperature battery
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Chen, Yuqing (författare)
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He, Qiu (författare)
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Zhao, Yun (författare)
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visa fler...
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Zhou, Wang (författare)
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Xiao, Peitao (författare)
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Gao, Peng (författare)
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- Tavajohi Hassan Kiadeh, Naser (författare)
- Umeå universitet,Kemiska institutionen
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Tu, Jian (författare)
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Li, Baohua (författare)
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He, Xiangming (författare)
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Xing, Lidan (författare)
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Fan, Xiulin (författare)
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Liu, Jilei (författare)
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(creator_code:org_t)
- Springer Nature, 2023
- 2023
- Engelska.
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Ingår i: Nature Communications. - : Springer Nature. - 2041-1723. ; 14
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Low temperatures severely impair the performance of lithium-ion batteries, which demand powerful electrolytes with wide liquidity ranges, facilitated ion diffusion, and lower desolvation energy. The keys lie in establishing mild interactions between Li+ and solvent molecules internally, which are hard to achieve in commercial ethylene-carbonate based electrolytes. Herein, we tailor the solvation structure with low-ε solvent-dominated coordination, and unlock ethylene-carbonate via electronegativity regulation of carbonyl oxygen. The modified electrolyte exhibits high ion conductivity (1.46 mS·cm−1) at −90 °C, and remains liquid at −110 °C. Consequently, 4.5 V graphite-based pouch cells achieve ~98% capacity over 200 cycles at −10 °C without lithium dendrite. These cells also retain ~60% of their room-temperature discharge capacity at −70 °C, and miraculously retain discharge functionality even at ~−100 °C after being fully charged at 25 °C. This strategy of disrupting solvation dominance of ethylene-carbonate through molecular charge engineering, opens new avenues for advanced electrolyte design.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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- art (ämneskategori)
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Chen, Yuqing
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He, Qiu
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Zhao, Yun
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Zhou, Wang
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Xiao, Peitao
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Gao, Peng
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visa fler...
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Tavajohi Hassan ...
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Tu, Jian
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Li, Baohua
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He, Xiangming
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Xing, Lidan
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Fan, Xiulin
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Liu, Jilei
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
- Artiklar i publikationen
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Nature Communica ...
- Av lärosätet
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Umeå universitet