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● 技術名稱 Technology
● 發明人 Inventor
黃炳照, 蘇威年, 蔣仕凱, 黃貞睿, 楊盛强,
● 所有權人 Asignee 國立臺灣科技大學
●
專利國家 Country 申請號 Application No. 專利號 Patent No. 中心案號 Serial No.
中華民國 110127448 I771125 1090105TW0
美國 17/386,124 US12,119,496B2 1090105US0
  點閱數:1857

技術摘要:
Lithium metal establishes a promising anode, but it suffers from dendrite growth. Constructing a current collector with stable artificial solid electrolyte interphase (SEI) and lithiophilic matrix is highly considered for achieving uniform lithium (Li) deposition. In this work, lithiophilic silver nanoparticles with polydopamine (Ag@PDA) were synthesized successfully and coated on the copper (Cu) current collector to use as a nucleation seed to improve the lithium nucleation. More importantly, graphene oxide (GO) was effectively coated on the top of Ag@PDA to act as artificial SEI to buffer the Li-ion distribution in anode free lithium metal batteries (AFLMBs). Thus, the synergistic effect of the modified electrodes displays a uniform Li metal deposition and dendrite free morphology during repeated cycling. Accordingly, the Cu|Ag@PDA//Li, and Cu|Ag@PDA-GO//Li cells demonstrate relatively uniform lithium nuclei, lower nucleation overpotential, and higher CE compared to the uncoated electrode. Besides, the Cu|Ag@PDA-GO//NMC full cell owns higher average Coulombic efficiency (~ 98.6%) and higher capacity retention (~ 55.7%) after 60 cycles within 5% fluoroethylene carbonate (FEC) in the carbonate-based electrolyte at 0.5 mA cm-2. While, the bare copper only achieves, 94.4% and 4.3% average Coulombic efficiency and capacity retention, respectively. Therefore, a lithiophilic matrix integrated with an artificial SEI coating on the Cu substrate offers a feasible way for the inhibition of lithium dendrite and electrolyte decomposition in the anode free lithium metal batteries (AFLMBs).

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