Superior electrochemical performance of a novel LiFePO/C/CNTs composite for aqueous rechargeable lithium-ion batteries.

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ID: 82729
2020
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Ranked #32 of 184 articles by views in Physical chemistry chemical physics : PCCP

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Abstract
Olivine LiFePO4 covered flocculent carbon layers wrapped with carbon nanotubes (CNTs) prepared by sol-gel method and calcination is used as the cathode material for aqueous rechargeable lithium-ion batteries (ARLBs). The phase structures and morphologies of the composite material are characterized by X-ray diffraction (XRD), selected area electron diffraction (SAED), and transmission electron microscopy (TEM). The mechanism and method through which CNTs and flocculent carbon improve the electrochemical performance are investigated in an aqueous lithium-ion battery by setting up a comparative experiment. The ARLB system is assembled using a LiFePO4/C/CNTs cathode and a zinc anode in 1 mol L-1 ZnSO4·7H2O and saturated LiNO3 aqueous solution (pH = 6), which can deliver a capacity of 158 mA h g-1 at a rate of 1C. Even at a rate of 50C, it still has a capacity of 110 mA h g-1 after 250 cycles with fantastic capacity retention (95.7%). The lithium-ion diffusion coefficient increases by an order of magnitude due to the addition of CNTs together with flocculent carbon. Four LEDs are successfully powered by the ARLBs for more than one minute to demonstrate the practical application. The excellent rate capabilities and thrilling discharge capacity at a high rate indicate that this cathode material possesses excellent electrochemical performance, and this ARLB system exhibits excellent potential as a power source for environmental applications.
Reference Key
duan2020superiorphysical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Duan, Wenyuan;Zhao, Mingshu;Mizuta, Yusuke;Li, Yanlin;Xu, Tong;Wang, Fei;Moriga, Toshihiro;Song, Xiaoping;
Journal Physical chemistry chemical physics : PCCP
Year 2020
DOI
10.1039/c9cp06042a
URL
Keywords
sol–gel method 0.5li2mno3·0.5limn0.8ni0.1co0.1o2 cathode material co-precipitation method lithium-rich layered oxide voltage decay

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