Enhancing high-rate electrochemical properties of LiMn2O4 in a LiMn2O4/LiNi0.5Mn1.5O4 core/shell composite

Potapenko, Anna V.; Kirillov, S. А.

doi:10.1016/j.electacta.2017.10.108

Cited by 25 publications

(18 citation statements)

References 44 publications

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“…Spinel LiMn 2 O 4 (LMO) has been recognized as one of the promising cathode materials for the lithium-ion batteries due to the environmental compatibility, low cost, and high specific capacity [1][2][3][4]. However, the poor rate performance caused by the low Li + conductivity and the rapid capacity fading induced by the Jahn-Teller distortion have severely impeded its commercial applications [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Zhao

Yang

et al. 2021

Nanomaterials

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Li2ZrO3-coated and Al-doped micro-sized monocrystalline LiMn2O4 powder is synthesized through solid-state reaction, and the electrochemical performance is investigated as cathode materials for lithium-ion batteries. It is found that Li2ZrO3-coated LiAl0.06Mn1.94O4 delivers a discharge capacity of 110.90 mAhg−1 with 94% capacity retention after 200 cycles at room temperature and a discharge capacity of 104.4 mAhg−1 with a capacity retention of 87.8% after 100 cycles at 55 °C. Moreover, Li2ZrO3-coated LiAl0.06Mn1.94O4 could retain 87.5% of its initial capacity at 5C rate. This superior cycling and rate performance can be greatly contributed to the synergistic effect of Al-doping and Li2ZrO3-coating.

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Section: Introductionmentioning

confidence: 99%

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Zhao

Yang

et al. 2021

Nanomaterials

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“…[1][2][3] To date, a variety of electrode materials have been developed. [4][5][6][7][8][9] LiCO 2 and LiFePO 4 are the most widely used cathode materials in commercial LIBs because of their good cycle life (>500 cycles); however, they have several drawbacks such as high cost, toxicity of Co for LiCoO 2 , poor electronic and ionic conductivity, relatively low specic capacity and one-dimensional channels for lithium-ion diffusion for LiFPO 4 . 10 In this context, cubic spinel LiMn 2 O 4 (LMO) as a cathode material has attracted continuous and considerable attention owing to its low cost, natural abundant resources of manganese, high safety, facile 3D Li + -ion diffusion pathways, and nontoxicity.…”

Section: Introductionmentioning

confidence: 99%

“…5,28 No peaks of impurities were observed aer doping and coating, which indicated that both B 2 O 3 and Al 2 O 3 layers existed in the amorphous state.Fig. 2shows the SEM images of all samples.…”

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confidence: 99%

Nb-doped and Al₂O₃ + B₂O₃-coated granular secondary LiMn₂O₄ particles as cathode materials for lithium-ion batteries

Zhang

Yang

et al. 2019

RSC Adv.

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“…7. Вольт-амперна крива для зразка 13 манганових шпінелей і пояснюється недосконалістю їх структури та спричиненою цим недоступністю всіх можливих позицій для іонів літію[6, 11,12]. За струму 20 С зразок віддає ємність ~25 мАг/г.…”

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“…Після достатньо жорстких випробувань він демонструє досить добру схоронність заряду, повертаючи в контро льних циклах струмом 1 С до 98 % вихідної ємності. Такий результат є порівняним з найкращими результатами, відомими для нанорозмірних порошкуватих літій-манганових шпінелей[11,12].…”

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Delicate lithium-manganese spinel LiMn2O4 of quasi-spherical morphology, obtained by hydrolysis of complex compounds, as cathode material for high-power current sources

Kirillov¹,

Potapenko²,

Lisnycha³

2021

New Functional Substances and Materials for Chemical Engineering

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Precipitation of hydroxides and carbonates from solutions containing complex compounds is a valuable industrial process enabling one to synthesize electrode materials with high density particles of microspherical morphology and high tap density. As a complex formation agent, ammonia is almost exclusively used in this process. Aiming at the search of other complex formation agents and the detailed studies of complex formation at precipitation, we have first investigated the hydrolysis of solutions containing citric acid. Equilibria in solutions containing citrate complexes of manganese and carbonates are computed. It is found that in Mn(NO3)2 - хC6H8O7∙H2O - уNa2CO3 systems, a neutral Mn(HCitr) complex dominates up to pH=9.5 and precipitation of MnCO3 from carbonate containing solutions begins at рН~6.5. Experiments show that MnCO3 precipitates from these systems in the form of openwork quasi-spherical aggregates formed by nanosized crystals. The synthesis of LiMn2O4 from this precursor does not influence the morphology of the material, and the resulting product consists of aggregates of less than 4 mkm and nanocrystals of ~90 nm. Electrochemical tests evidence that for the best samples, the specific capacity of 103 mAh/g can be achieved at 1 C current. At 20 C current, they deliver ~25 mAh/g capacity. After high-rate tests, in control cycles with 1 C current, the samples demonstrate high capacity retention, returning up to 98% of their initial capacity. This signifies their good prospects for using in high-rate batteries.

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Enhancing high-rate electrochemical properties of LiMn2O4 in a LiMn2O4/LiNi0.5Mn1.5O4 core/shell composite

Cited by 25 publications

References 44 publications

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Nb-doped and Al₂O₃ + B₂O₃-coated granular secondary LiMn₂O₄ particles as cathode materials for lithium-ion batteries

Delicate lithium-manganese spinel LiMn2O4 of quasi-spherical morphology, obtained by hydrolysis of complex compounds, as cathode material for high-power current sources

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Enhancing high-rate electrochemical properties of LiMn2O4 in a LiMn2O4/LiNi0.5Mn1.5O4 core/shell composite

Cited by 25 publications

References 44 publications

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Li2ZrO3-Coated Monocrystalline LiAl0.06Mn1.94O4 Particles as Cathode Materials for Lithium-Ion Batteries

Nb-doped and Al2O3 + B2O3-coated granular secondary LiMn2O4 particles as cathode materials for lithium-ion batteries

Delicate lithium-manganese spinel LiMn2O4 of quasi-spherical morphology, obtained by hydrolysis of complex compounds, as cathode material for high-power current sources

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Nb-doped and Al₂O₃ + B₂O₃-coated granular secondary LiMn₂O₄ particles as cathode materials for lithium-ion batteries