Excellent Electrochemical Performance and Thermal Stability of LiNi0.5Mn1.5O4 Thin-Film Cathode Prepared by Pulsed Laser Deposition

Yan Wang; Guang Yang; Qian Peng; Pei Xiang Lu

doi:10.4028/www.scientific.net/AMR.853.83

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 853Excellent Electrochemical Performance and Thermal...

Excellent Electrochemical Performance and Thermal Stability of LiNi_0.5Mn_1.5O₄ Thin-Film Cathode Prepared by Pulsed Laser Deposition

Abstract:

Lithium secondary batteries using LiNi_0.5Mn_1.5O₄ (LNMO) films as a cathode material were prepared by pulsed laser deposition on stainless steel substrates. X-ray diffraction and Field-emission Scanning Electron Microscope results show that the film deposited at 750°C exhibits good crystallinity with well-defined grains structure. Galvanostatic charge/discharge measurement results revealed that the reversible capacity maintains 116.8mAhg^-1 after 100 cycles at 0.5C. It also exhibits excellent rate capability, as the rates increase to 5 and 10 C, about 95.4% and 92.3% of its initial capacity at 0.2C can be retained. In additional, thermal stability of the Al₂O₃ coated LNMO thin film cathodes were also explored. The high temperature cyclic performance of LNMO thin film electrode was significantly enhanced by the coating.

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Advanced Materials Research (Volume 853)

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83-89

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https://doi.org/10.4028/www.scientific.net/AMR.853.83

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December 2013

Authors:

Yan Wang, Guang Yang*, Qian Peng, Pei Xiang Lu

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Cycling Performance, Pulsed Laser Deposition, Rate Capability, Thermal Stability

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