專利商品網


    快速搜尋        


     
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 申請中 1090105TW0
美國 17/386,124 申請中 1090105US0
中國 202110855390.0 申請中 1090105CN0
  點閱數:68

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).

相關圖片: