Citric acid aided synthesis, characterization, and high-rate electrochemical performance of LiNi0.5Mn1.5O4

Potapenko, Anna V.; Chernukhin, S. I.; Romanova, I. V.; Рабаданов, К. Ш.; Гафуров, М. М.; Kirillov, S. А.

doi:10.1016/j.electacta.2014.04.083

Cited by 33 publications

(12 citation statements)

References 69 publications

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“…To suppress the Jahn-Teller distortion, substitutions of the octahedral 16d sites of Mn 3+ ions with other ions such as Fe, Co, Al, Ni, Ti, Zn, Cr, La, Ce [8][9][10][11][12][13][14][15][16] are proved to be a very efficient approach by many researchers. Whereas, the discharge capacity of LiMn 2 O 4 depends on its content of the Mn 3+ ions [17].…”

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confidence: 99%

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Zeng

2016

Micro & Nano Letters

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The lithium-ion battery cathode materials spinel LiMn 2 O 4 and LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 samples are synthesised by solid state reaction route, the effects of magnesium and chlorine co-doping on the structure, morphology and electrochemical performance of material LiMn 2 O 4 are studied by X-ray diffraction, scanning electron microscope, electron diffraction spectroscope and galvanostatic charge-discharge, respectively. The results indicate that appropriate amount doping of magnesium and chlorine does not change the spinel structure of LiMn 2 O 4 , and the results reveal that the LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 has an initial discharge capacity of 125.2 mAh/g at 0.2C, and the capacity retention is still as high as 89.3% even after 100 cycles, which is significantly higher than 79.6% of LiMn 2 O 4. Especially, the LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 shows the discharge capacity of 91.2 mAh/g at 10C, which higher than that of LiMn 2 O 4 (64.3 mAh/g). The LiMg 0.05 Mn 1.95 O 3.9 Cl 0.1 exhibits excellent cycling performance and rate capability than that of LiMn 2 O 4. Thus, this is a very effective way for comprehensive improving LiMn 2 O 4 electrochemical performance.

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confidence: 99%

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Zeng

2016

Micro & Nano Letters

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“…The corresponding rate capability curves are shown in Figure (c). For both electrodes, the discharge capacities gradually increase in initial several cycles, maybe due to the initial electrochemical activation . When the current goes back to 0.2 C after rate capability test, the discharge capacity of LNMO‐O 2 reverts to value close to initial 0.2 C capacity, suggesting its excellent structural stability after high‐rate charge/discharge test .…”

Section: Resultsmentioning

confidence: 94%

Effect of Presintering Atmosphere on Structure and Electrochemical Properties of LiNi_0.5Mn_1.5O₄ Cathode Materials for Lithium‐Ion Batteries

et al. 2020

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Carbonate precursor prepared by coprecipitation‐hydrothermal method was first presintered under air and oxygen atmosphere, respectively, and calcinated with Li2CO3 to achieve two LiNi0.5Mn1.5O4 materials. The effects of presintering atmosphere on the structure, morphology and electrochemical performance of materials were investigated. It is found that LiNi0.5Mn1.5O4 material prepared by presintering under oxygen atmosphere exhibits higher discharge capacities, enhanced rate capability and cycling performance, compared to that prepared by presintering under air atmosphere. This improvement is mainly attributed to the elimination of LixNi1‐xO impurity phase, more stable crystal structure, lower Mn3+ content, smaller particle size with homogeneous distribution, lower charge transfer resistance and higher Li+ ion diffusion coefficient. Its discharge capacity at 10 C rate is 125.8 mAh g−1 and capacity retention rate after 200 cycles at 1 C is 92.6%, much higher than 111.3 mAh g−1 and 80.0% of that prepared by presintering under air atmosphere. The presintering under oxygen atmosphere is proven to be beneficial to the electrochemical performance of LiNi0.5Mn1.5O4 material.

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“…Citrate precursors have been obtained in the following way [27][28][29][30][31]. Solutions of lithium nitrate, manganese-II nitrate, and citric acid (all of analytical grade) of approx.…”

Section: Methodsmentioning

confidence: 99%

“…increases their rate [16]. To do so, significant efforts are undertaking in the field of sol-gel synthesis of electrode materials with improved electrochemical parameters [17][18][19][20][21][22][23][24][25][26], in particular, using oxyacid metal salts (citrates on the first place) as precursors [21][22][23][24][25][26][27]. High homogeneity of final products and lower thermal treatment temperatures decrease the probability of particle growth and are considered to be advantages of such approaches.…”

Section: Introductionmentioning

confidence: 99%

A new method of pretreatment of lithium manganese spinels and high-rate electrochemical performance of Li[Li0.033Mn1.967]O4

Potapenko

Chernukhin

Kirillov

2014

Mater Renew Sustain Energy

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Lithium manganese spinels tend to aggregate upon annealing and do not allow for attaining high discharge rates when used as cathodes in lithium-ion batteries. To obtain spinel samples of lower aggregation and better highrate properties, precursors synthesized by means of a citric acid-aided route are suggested to be pyrolyzed in an inert atmosphere, instead of pyrolysis in air. The synthesis of nanosized Li[Li 0.033 Mn 1.967 ]O 4 is described, and its characteristics including X-ray diffraction, scanning electron microscopy, and porosity, as well as electrochemical test results are presented. The particle size of the materials obtained is smaller, the degree of aggregation is lower, and high-rate properties are better than for analogues pyrolyzed in air. In particular, sample Li||Li[Li 0.033 Mn 1.967 ]O 4 cells deliver *60 mAh g -1 at the current loads of 4,000 mA g -1

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Citric acid aided synthesis, characterization, and high-rate electrochemical performance of LiNi0.5Mn1.5O4

Cited by 33 publications

References 69 publications

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Effect of Presintering Atmosphere on Structure and Electrochemical Properties of LiNi_0.5Mn_1.5O₄ Cathode Materials for Lithium‐Ion Batteries

A new method of pretreatment of lithium manganese spinels and high-rate electrochemical performance of Li[Li0.033Mn1.967]O4

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Citric acid aided synthesis, characterization, and high-rate electrochemical performance of LiNi0.5Mn1.5O4

Cited by 33 publications

References 69 publications

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn2O4cathode materials

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn2O4cathode materials

Effect of Presintering Atmosphere on Structure and Electrochemical Properties of LiNi0.5Mn1.5O4 Cathode Materials for Lithium‐Ion Batteries

A new method of pretreatment of lithium manganese spinels and high-rate electrochemical performance of Li[Li0.033Mn1.967]O4

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Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Effects of magnesium and chlorine co‐doping on the structural and electrochemical performance of the spinel LiMn₂O₄cathode materials

Effect of Presintering Atmosphere on Structure and Electrochemical Properties of LiNi_0.5Mn_1.5O₄ Cathode Materials for Lithium‐Ion Batteries