Preparation and electrochemical properties of LiMn2O4 by the microwave-assisted rheological phase method

He, Benlin; Zhou, Wenjia; Bao, Shu‐Juan; Liang, Yanyu; Li, Hu‐Lin

doi:10.1016/j.electacta.2006.10.002

Cited by 21 publications

(4 citation statements)

References 36 publications

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“…Aluminium is a preferred dopant for LMO [16][17][18] since it is abundant, non-toxic, less expensive and lighter than transition metal elements. Reports on the application of microwave irradiation (MWI) in the preparation of LMO have focussed on reducing the synthesis time, [22][23][24][25][26][27][28] there is no report on the strategic utilisation of MWI aimed at curbing the recalcitrant capacity fading. We have found that microwave irradiation can enhance cycling behaviour by controlling the manganese valence state, structure, and morphological integrity of the LMO and Al-doped LMO.…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials

et al. 2015

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Microwave irradiation at the pre-and post-annealing steps of the synthesis of LiAl x Mn 2Àx O 4 (x ¼ 0 and 0.3) spinel cathode materials for rechargeable lithium ion batteries is a useful strategy to optimize the average manganese valence number (n Mn ) for enhanced capacity and capacity retention. The strategy impacts on the lattice parameter, average manganese valence, particle size and morphology, reversibility of the deintercalation/intercalation processes, and capacity retention upon continuous cycling. Microwave irradiation is able to shrink the particles for improved crystallinity. The XPS data clearly suggest that microwave irradiation can be used to tune the manganese valence (n Mn ), and that the LiAl x Mn 2Àx O 4 with n Mn z 3.5+ gives the best electrochemical performance. These new findings promise to revolutionize how we use microwave irradiation in the preparation of energy materials and various other materials for energy storage and conversion materials for enhanced performance.

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Section: Introductionmentioning

confidence: 99%

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials

et al. 2015

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“…10(a) shows the first-cycle charge-discharge behavior of LiMn 2 O 4 particles calcined at 850 • C. The charge-discharge curves clearly show deintercalation and intercalation processes (He, Zhou, Bao, Liang, & Li, 2007). The undoped pristine LiMn 2 O 4 synthesized using the sol-gel method has a maximum discharge capacity of 124 mA h/g and charging capacity of 130 mA h/g.…”

Section: Edax Analysismentioning

confidence: 97%

Effects of multi-dopants (Zn and Ho) in stabilizing spinel structure for cathode materials in lithium rechargeable batteries—Novel chelated sol–gel synthesis

2016

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“…Carrying out MW heating at various stages of solid state, sol-gel (combustion) and hydrothermal syntheses [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] reduces the duration of the process and promotes the formation of crystals of smaller and more uniform size. However, data on the electrochemical characteristics of such materials are either completely absent [27,28,31,35,36,42] or limited by a conclusion regarding fast capacity fade during relatively short cycling and discharge with currents up to 10 C [26,29,30,[32][33][34][37][38][39][40][41]43]. The same is true for LiMn2O4 obtained by means of a citric acid aided route and MW heating [44,45].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of LiMn2O4 for high-rate applications by means of citric acid aided route and microwave heating

Shmatok,

Potapenko,

Kirillov

2024

J. Electrochem. Sci. Eng.

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Due to shortening the duration of the process and possibility to obtain crystals of smaller and uniform size, microwave heating is considered an effective and promising tool for the synthesis of LiMn2O4, a valuable cathode material for lithium-ion batteries. However, electrochemical characteristics of LiMn2O4 obtained with its help are almost completely absent and do not allow for drawing a sound conclusion regarding advantages and drawbacks of microwave processing. Here we present a description of the microwave-assisted citric acid aided synthesis, characterization and electrochemical performance of LiMn2O4. The disclosure of detailed working protocols enabling one to manufacture samples tolerant to extremely high currents is the main novelty of this paper. Specifically, our material sustains current loads up to 40 C (5920 mA g-1) and completely recovers after cycling at harsh conditions.

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Preparation and electrochemical properties of LiMn2O4 by the microwave-assisted rheological phase method

Cited by 21 publications

References 36 publications

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials

Effects of multi-dopants (Zn and Ho) in stabilizing spinel structure for cathode materials in lithium rechargeable batteries—Novel chelated sol–gel synthesis

Optimal design of LiMn2O4 for high-rate applications by means of citric acid aided route and microwave heating

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Preparation and electrochemical properties of LiMn2O4 by the microwave-assisted rheological phase method

Cited by 21 publications

References 36 publications

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAlxMn2−xO4 (x = 0 and 0.3) spinel materials

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAlxMn2−xO4 (x = 0 and 0.3) spinel materials

Effects of multi-dopants (Zn and Ho) in stabilizing spinel structure for cathode materials in lithium rechargeable batteries—Novel chelated sol–gel synthesis

Optimal design of LiMn2O4 for high-rate applications by means of citric acid aided route and microwave heating

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Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials

Microwave-assisted optimization of the manganese redox states for enhanced capacity and capacity retention of LiAl_xMn_2−xO₄ (x = 0 and 0.3) spinel materials