期刊
ACS ENERGY LETTERS
卷 6, 期 4, 页码 1432-1442出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c00150
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资金
- National Research Foundation - Ministry of Science and ICT, Republic of Korea [NRF-2019R1A2B5B03001772, NRF-2019H1D3A1A01069779]
- [2E30981]
- National Research Foundation of Korea [2019H1D3A1A01069779] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study utilized radiofrequency plasma thermal evaporation to coat polymeric carbon-based semiconducting passivation layers on Li-metal electrodes, effectively suppressing dendrite growth and achieving stable battery cycling behavior.
Li-metal is an attractive anode material for next-generation batteries owing to its high capacity and low reduction potential. Unfortunately, it undergoes dendritic growth, which limits its development. Herein, amorphous polymeric carbon-based semiconducting passivation layers are applied to Li-metal electrodes using radiofrequency plasma thermal evaporation to suppress dendrite growth. The plasma power is controlled to adjust the semiconducting type and mechanical properties of the plasma-polymerized carbon layer (PCL). n- and p-type semiconducting PCLs (n- and p-PCLs) form ohmic and Schottky contacts, respectively, with the Li-metal. p-PCL was more effective than n-PCL at suppressing Li-dendrite formation, as the former enhanced the modulus and Li-ion conductivity, inducing Liion deposition below the passivation layer. The p-PCL-coated Li electrode maintains state-of-the-art stable dendrite-free cycling behavior with overpotentials of similar to 11.10 and similar to 79.84 mV over 16 450 and 2472 h at 1 and 10 mA cm(-2), respectively.
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