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Controlled synthesis of LiNi0.5Mn1.5O4 cathode materials with superior electrochemical performance through urea-based solution combustion synthesis

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Title: Controlled synthesis of LiNi0.5Mn1.5O4 cathode materials with superior electrochemical performance through urea-based solution combustion synthesis
Authors: Zhu, Chunyu Browse this author →KAKEN DB
Han, Cheng-gong Browse this author
Akiyama, Tomohiro Browse this author →KAKEN DB
Keywords: spinel lithium nickel manganese oxide
lithium ion battery
cathode material
solution combustion synthesis
Issue Date: 29-May-2015
Publisher: Royal Society of Chemistry (RSC)
Journal Title: RSC advances
Volume: 5
Issue: 62
Start Page: 49831
End Page: 49837
Publisher DOI: 10.1039/c5ra06109a
Abstract: High-voltage LiNi0.5Mn1.5O4 cathode materials were synthesized using urea-based solution combustion synthesis combined with a calcination treatment. The morphology and particle size distribution of the products were considerably dependent on the amount of urea fuel. The electrochemical characterization illustrated that the sample that was produced with a fuel ratio of phi = 0.5 had a homogenous particle size distribution of approximately 8 mu m, and showed the best cycling and rate performance. LiNi0.5Mn1.5O4 with two different structures of disordered Fd (3) over barm and ordered P4(3)32 were obtained by controlling the calcination process. The samples, which were calcined at 800 degrees C with fast cooling, presented a disordered structure of Fd (3) over barm, and the samples, which were calcined at 800 degrees C with slow cooling and reannealing at 600 degrees C, demonstrated an ordered structure of P4(3)32. The sample with a disordered structure exhibited a better electrochemical performance than the sample with an ordered structure. The disordered sample produced at phi = 0.5 presented a discharge capacity of 130.73 mA h g(-1) and a capacity retention of 98.43% after 100 cycles at 1 C. Even at a higher current rate of 3 C, the sample still showed a high discharge capacity of 117.79 mA h g(-1) and a capacity retention efficiency of 97.63% after 300 cycles.
Type: article (author version)
URI: http://hdl.handle.net/2115/61924
Appears in Collections:エネルギー・マテリアル融合領域研究センター (Center for Advanced Research of Energy and Material) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 朱 春宇

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