Facile synthesis of porous LiMn2O4 spheres as positive electrode for high-power lithium ion batteries

Xi, Liu Jiang; Wang, Hong‐En; Lu, Zhouguang; Yang, Shi-Jie; Guang, Ru; Deng, Jianzhi; Chung, C.Y.

doi:10.1016/j.jpowsour.2011.09.100

Cited by 124 publications

(44 citation statements)

References 36 publications

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“…As shown, each plot consists of a depressed semicircle in the high frequency region and a sloping line at low frequency range. The depressed semicircle reflects the interface impendence, including interfacial layer and charge transfer reaction and the sloping line reflects the diffusion of Li-ion in the solid electrode, respectively3031. It can be seen that the interface impendence of HI-LNMO is the smallest.…”

Section: Resultsmentioning

confidence: 98%

Investigation on preparation and performance of spinel LiNi0.5Mn1.5O4 with different microstructures for lithium-ion batteries

Xue

Wang

Zheng

et al. 2015

Sci Rep

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The high voltage spinel LiNi0.5Mn1.5O4 is a promising cathode material in next generation of lithium ion batteries. In this study, LiNi0.5Mn1.5O4 with various particle microstructures are prepared by controlling the microstructures of precursors. LiNi0.5Mn1.5O4 spinel samples with solid, hollow and hierarchical microstructures are prepared with solid MnCO3, hollow MnO2 and hierarchical Mn2O3 as precursor, respectively. The homemade spinel materials are investigated and the results show that the content of Mn3+ and impurity phase differ much in these three spinel samples obtained under the same calcining and annealing conditions. It is revealed for the first time that an inhomogeneous migration of atoms may introduce Mn3+ and impurity phase in the spinel. The hierarchical microstructure with the primary particles interconnected is optimal for electrode materials because this microstructure has a higher conductivity between the interconnected primary particles and appropriate specific surface area. LiNi0.5Mn1.5O4 in this microstructure has the best rate capability and also the best long-term cycling stability.

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Section: Resultsmentioning

confidence: 98%

Investigation on preparation and performance of spinel LiNi0.5Mn1.5O4 with different microstructures for lithium-ion batteries

Xue

Wang

Zheng

et al. 2015

Sci Rep

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show abstract

“…As compared to everreported LiÀMnÀO spinel cathodes, [3,[32][33][34] for example, 72 mAh g À1 for mesoporous Li 1.12 Mn 1.88 O 4 at 3000 mA g À1 (23 C) [3] and 76 mAh g À1 for porous LiMn 2 O 4 microspheres at 20 C (decreasing to 47 mAh g À1 after 1000 cycles), [32] the above performance of nano-sized Li 1.16 Mn 1.84 O 4 electrode is also excellent.…”

Section: Resultsmentioning

confidence: 86%

Microemulsion‐Assisted Synthesis of Nanosized LiMnO Spinel Cathodes for High‐Rate Lithium‐Ion Batteries

et al. 2014

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. Microemulsion-assisted synthesis of nanosized Li-Mn-O spinel cathodes for high-rate lithium-ion batteries. ChemPlusChem, 79 (12), 1794-1798.Microemulsion-assisted synthesis of nanosized Li-Mn-O spinel cathodes for high-rate lithium-ion batteries Abstract Li1.16Mn1.84O4 nanoparticles (50-90 nm) with cubic spinel structure are synthesized by combining a microemulsion process to produce ultrafine Mn(OH)2 nanocrystals (3-8 nm) with a solid-state lithiation step. The nanostructured lithium-rich Li1.16Mn1.84O4 shows stable cycling performance and superior rate capabilities as compared with the corresponding bulk material, for example, the nano-sized Li1.16Mn1.84O4 electrode shows stable reversible capacities of 74 mAhg-1 during the 1000th cycle at a high rate of 40 C between 3.0 and 4.5 V. In addition, Li1.16Mn1.84O4 nanoparticles also show high Li storage properties over an enlarged voltage window of 2.0-4.5 V with high capacities and stable cyclability, for example, delivering discharge capacities of 209 and 114 mAhg-1 at rates of 1 and 20 C, respectively.

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“…Since the two products have same composition and same treatments, the remarkable improvement in rate capability of T-LNMO is mainly attributed to the higher BET surface area and more dispersed particles. Higher BET surface area and more dispersed particles could easily form short ion diffusion channels and provide better penetration of electrolyte thereby lead to a better rate performance [10,11]. The specific capacity and capacity retention at high rate of T-LNMO is also superior to some pristine LiNi 0.5 Mn 1.5 O 4 prepared by sol-gel method [12] or self-sacrifice template method [13].…”

Section: Resultsmentioning

confidence: 99%

LiNi0.5Mn1.5O4 with significantly improved rate capability synthesized by a facile template method using pine wood as a bio-template

Liu

Wang

2015

Materials Letters

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Facile synthesis of porous LiMn2O4 spheres as positive electrode for high-power lithium ion batteries

Cited by 124 publications

References 36 publications

Investigation on preparation and performance of spinel LiNi0.5Mn1.5O4 with different microstructures for lithium-ion batteries

Investigation on preparation and performance of spinel LiNi0.5Mn1.5O4 with different microstructures for lithium-ion batteries

Microemulsion‐Assisted Synthesis of Nanosized LiMnO Spinel Cathodes for High‐Rate Lithium‐Ion Batteries

LiNi0.5Mn1.5O4 with significantly improved rate capability synthesized by a facile template method using pine wood as a bio-template

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