| DOI | Resolve DOI: https://doi.org/10.1016/j.jallcom.2015.01.182 |
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| Author | Search for: Guo, Donglei; Search for: Wei, Xiuge; Search for: Chang, Zhaorong; Search for: Tang, Hongwei; Search for: Li, Bao; Search for: Shangguan, Enbo; Search for: Chang, Kun; Search for: Yuan, Xiao-Zi1; Search for: Wang, Haijiang1 |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Subject | Cathodes; Charge transfer; Cyclic voltammetry; Diffusion; Electric batteries; Electric discharges; Electrochemical impedance spectroscopy; Electrodes; Geometry; Ions; Lithium; Lithium alloys; Lithium compounds; Manganese; Manganese oxide; Nanorods; Oxides; Secondary batteries; Solid state reactions; Spheres; Synthesis (chemical); BET surface area; Brunauer emmett tellers; Cath-ode materials; Charge transfer resistance; Electrochemical performance; Galvanostatic charge discharges; Lithium manganese oxide; Polyhedron sphere like; Lithium batteries |
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| Abstract | Polyhedron structured sphere-like lithium manganese oxide (LiMninf2/infOinf4/inf) is successfully synthesized from β-MnOinf2/inf nanorod precursor via a solid state reaction at a temperature of 800 °C. For comparison, LiMninf2/infOinf4/inf materials with nanorod and octahedron structures are also obtained from β-MnOinf2/inf nanorod precursor at temperatures of 700 °C and 900 °C, respectively. The galvanostatic charge-discharge result shows that the polyhedron sphere-like LiMninf2/infOinf4/inf sample exhibits the best electrochemical performance at high rate and high temperature. After 100 cycles at 5 C, this electrode is able to maintain 94% of its capacity at 25 °C and 81% at 55 °C. This is attributed to that the polyhedron sphere-like spinel LiMninf2/infOinf4/inf can suppress the dissolution of manganese ions. Based on Brunauer Emmett Teller (BET), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), the polyhedron sphere-like LiMninf2/infOinf4/inf sample has the lowest BET surface area, largest diffusion coefficient of Lisup+/sup and least charge transfer resistance. This study provides an insight into the capacity fading of LiMninf2/infOinf4/inf electrodes and the polyhedron structured sphere-like LiMninf2/infOinf4/inf can be a promising material for lithium ion batteries. |
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| Publication date | 2015-01-30 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21275680 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 5a91d2c3-1450-4d35-a123-78c9a8003d4b |
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| Record created | 2015-07-14 |
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| Record modified | 2020-04-22 |
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