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Introduction of manganese based lithium-ion Sieve-A review

Progress in Natural Science:Materials International 2020年第2期30卷 139-152页

作者： Ding Weng Haoyue Duan Yacong Hou Jing Huo Lei Chen Fang Zhang Jiadao Wang State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua University The Education Ministry Key Lab of Resource Chemistry Shanghai Key Laboratory of Rare Earth Functional MaterialsShanghai Normal University China Center for Information Industry Development

With the large-scale use of lithium-ion batteries,the global demand for lithium resources has increased *** is essential to extract lithium resources from liquid lithium sources such as brine and seawater,as well as recycled waste lithium-ion *** various liquid lithium extraction technologies,lithium ionsieve(LIS) adsorption is considered to be the most promising method for its low energy consumption and *** method has advantages of excellent lithium uptake capacity,high selective,and good regeneration *** this review,we summarized the development of lithium manganese oxides(LMO)-type LIS,including the chemical structure,lithium intercalation/de-intercalation mechanism,preparation methods and forming technology of this *** problems in the industrial application of ion-sieves are put forward,and the future research directions are prospected.

关键词： Ion-sieve lithium adsorption lithium manganese oxides

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Influence of Thickness on the Properties of Solution-derived LiMn_2O_4 Thin Films

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Journal of Wuhan University of Technology(Materials Science) 2009年第5期24卷 706-710页

作者：吴显明 College of Chemistry and Chemical Engineering Jishou University

LiMn2O4 thin films of different thickness were derived from solution deposition and heat treated by rapid thermal annealing. The phase identification and surface morphology were studied by X-ray diffraction and scanning electron microscopy. The electrochemical properties of the films were examined by galvanostatic charge-discharge experiments and electrochemical impedance spectroscopy. LiMn2O4 thin films of different thickness derived from solution deposition and rapid thermal annealing are homogeneous and crack free with the grain size between 20 nm and 50 nm. The specific capacity of these films is between 42 and 47 μAh· cm^2· μm^-1. The capacity decreases with the increase of discharge current density. The capacity loss per cycle increases from 0.012% to 0.16% after being cycled 50 times as the film thickness increases from 0.18 μm to 1.04 μm. The lithium diffusion coefficients of these films are in the same order of 10-11 cm^2· s^-1.

关键词： lithium manganese oxides thin films diffusion electrochemical properties

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KINETIC STUDY OF SPINEL LiMn_2O_4 SYNTHESIZED BY SOLID REACTION WITH SOFT-CHEMICAL METHOD

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Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 512-518页

作者： C.Q. Xu Y. W. Tian Y. C. Zhai Z.J. Guo Z. Q. Huang School of Materials and Metallurgy Northeastern University Shenyang 110004 China

The differential thermal analysis （DTA） curves were measured at different heating rates in flowing air for studying the synthesis of the spinel LiMn2O3 with Li2CO3 and MnO2, The reaction began at about 503K, and finished at about 873K. The apparent activation energy of Kissinger method was about ***^-1, the reaction orderwas 1.67, the frequency factor was 7.81×10^9, and therefore the dinetic epuation was dδ/dt=A·exp（- E/RT）·（1-δ）^n=7.81×10^9, exp（-122770/RT）·（l-δ）^1.67 . Coats-Redfem integral method was used to analyze the DTA curves of the samples at different heating rates, and the calculated apparent activation energy and frequency factor were 112. 13kJ· mol^-1 and 1.18 × 10^9, respectively, rather close to that of Kissinger method. X-ray diffraction （XRD） and scanning electron microscope （SEM） results shown that the synthesized LiMn2O3 possesses pure phase, regular shape and normal particle distribution.

关键词： lithium manganese oxides synthesized kinetics Kissinger method,Coats-Redfern integral method

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Cubic nanocrystal constructed 3D porous LiMn_(2)O_(4): Low-temperature pyrolysis formation and high-performance as a cathode material for aqueous hybrid capacitor

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Journal of Materiomics 2021年第3期7卷 488-497页

作者： Jun Fan Li-Li Yu Gai-Di Fan Wei-Ling Xu Juan-Juan Xing Jing-Tai Zhao School of Material Science and Engineering Shanghai UniversityShanghai200444China School of Material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China

3D porous nano-LiMn2O4(nano-LMO)is successfully prepared at 250℃ by a low temperature pyrolysis,using porous MnO2 and lithium acetate as *** as-formed porous samples are demonstrated to be constructed by well-defined and uniform cubic nanocrystals with particle sizes regulated from tens to hundreds of nanometers by adjusting the annealing *** to its proper particle size with perfect crystallization(-50 nm)and rich pores,sample LMO-265,prepared at 265℃,exhibits high performance as an aqueous lithium ion *** can present a high specific capacity of 102 mAh g1 at a current density of 5℃ with a greatly improved rate capability(57.3%,68C)and capacity retention(70.7%,after 5000 cycles at 13.5C)in 1 M Li_(2)SO_(4).When assembled with commercial used active carbon(AC)to form an aqueous hybrid capacitor,it can deliver a high energy density of 15.8 Wh kg1 at a large power density of 9 kW kg1 with a good cycling life of 71.6%after 5000 at 2 Ag^(-1).Considering of its simple and economical preparation,as-prepared porous LMO can be regarded as a promising high-performance cathode material in aqueous electrolyte.

关键词： lithium manganese oxides aqueous lithium-ion cathode Porous material Solid pyrolysis

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