Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Ni-doped spinel LiNixMn2-xO4 (x = 0, 0.05, 0.10) samples were prepared by a sol-gel method. Structure and morphology of the samples were characterized by X-ray diffraction, scanning electron microscopy, BrunnauerEmmet-Teller method and inductively coupled plasma atomic absorption spectrometry. The electrochemical behavior as a cathode material (positive mass) for aqueous rechargeable lithium batteries (ARLBs) was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, capacity measurements and cycling tests. The results show that the LiNi 0.1Mn1.9O4 electrode presents the best rate and cycling performance but low reversible capacity. In contrast, the LiNi 0.05Mn1.95O4 electrode shows a higher reversible capacity and relatively good cycling behavior. At a current density of 150 mA g-1, LiNi0.05Mn1.95O4 delivers a reversible capacity of 102 mA h g-1. At the relative high current densities of 1500 and 3000 mA g-1, the LiNi 0.05Mn1.95O4 electrode still delivers reversible capacities of 95.0 and 88.7 mA h g-1, respectively. The Ni-doped samples show excellent cycling life in 0.5 mol L-1 Li 2SO4 aqueous solution. The capacity retention ratios for LiNi0.05Mn1.95O4 and LiNi0.10Mn 1.90O4 after 800 cycles at a current density of 1500 mA g-1 are 79.4% and 91.1%, respectively, much higher than that for the undoped LiMn2O4 at only 37.8%. 2013 Elsevier Ltd. 2013 Elsevier Ltd. All rights reserved.

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“…4a) in the organic electrolytes [5,10]. The initial capacities of the electrodes decrease with the increasing current density.…”

Section: Resultsmentioning

confidence: 99%

Spinel LiNixMn2−xO4 as cathode material for aqueous rechargeable lithium batteries

Wang

Xiao

Shi

et al. 2013

Electrochimica Acta

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“…The molten salt method is one of the simpler one-pot methods and usually its reactivity will be faster when compared to solid state reaction methods and this method offers defect free highly crystalline layered structure materials and no mixing and/or repeated reheating of the compounds are needed [23][24][25][26][27]. The initial reactants, 0.88 moles of LiNO 3 , 0.12 moles of LiCl, 1-x moles of (CH 3 COO) 2 Co and x moles of Mg(NO 3 ) 2 4H 2 O were weighed and heated in an alumina crucible at 800 °C in air for 6 h in a box furnace. After heating, the samples were cooled to room temperature before they were thoroughly washed with distilled water and filtered to remove the excess salts.…”

Section: Methodsmentioning

confidence: 99%

“…Commercial Lithium ion batteries (LIBs) consist of a LiCoO 2 [1] or LiMn 2 O 4 [2,3] LiNi 0.5 Mn 1.5 O 4 [4,5] or LiFePO 4 [6] and other cathode as cathodes [7] and Graphite as anode [8,9]. During the charging process, Li-ions are removed from the cathode and inserted in the anode and vice-versa during the discharging process.…”

Section: Introductionmentioning

confidence: 99%

Studies on Bare and Mg-doped LiCoO2 as a cathode material for Lithium ion Batteries

Reddy

Jie

Jafta

et al. 2014

Electrochimica Acta

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In this paper, we report on the preparation of bare and Mg-doped Li(Mg x Co 1-x )O 2 (x = 0, 0.03, 0.05) phases by a molten salt method and their electrochemical properties. They were prepared at 800 °C for 6 h in air. Rietveld refined X-Ray Diffraction data of bare (x = 0) and charge capacity values at the 60 th cycle to be: 147 (±3) mAh g -1 (x = 0), 127 (±3) mAh g -1 (x = 0.03), and 131 (±3) mAh g -1 (x=0.05) cycled at a current density of 30 mA g -1 . Capacity retention is also favourable at 98.5 %.

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“…Li and Al co-doped manganese oxide spinel compounds prepared by polyvinyl pyrrolidone precursor method improved the initial discharge capacity and capacity retention [88]. LiMn 2 O 4 /CNT composites are also reported with improved capacity retention and high rate capability for flexible electronics applications [84] [88][89][90][91][92][93][94]. LiMn 2 O 4 prepared by the one-pot molten salt method resulted in nano sized (~50 nm) hollow spherical particles which showed improved capacity retention even at high C-rates (i.e., 96% retention at 5C rate) [89].…”

Section: Layered Oxides Limo2 (M = Co Mn Ni and Their Mixtures)mentioning

confidence: 99%

A Review on Nanocomposite Materials for Rechargeable Li-ion Batteries

2017

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Li-ion batteries are the key enabling technology in portable electronics applications, and such batteries are also getting a foothold in mobile platforms and stationary energy storage technologies recently. To accelerate the penetration of Li-ion batteries in these markets, safety, cost, cycle life, energy density and rate capability of the Li-ion batteries should be improved. The Li-ion batteries in use today take advantage of the composite materials already. For instance, cathode, anode and separator are all composite materials. However, there is still plenty of room for advancing the Li-ion batteries by utilizing nanocomposite materials. By manipulating the Li-ion battery materials at the nanoscale, it is possible to achieve unprecedented improvement in the material properties. After presenting the current status and the operating principles of the Li-ion batteries briefly, this review discusses the recent developments in nanocomposite materials for cathode, anode, binder and separator components of the Li-ion batteries.

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Synthesis of compounds, Li(MMn11/6)O4 (M=Mn1/6, Co1/6, (Co1/12Cr1/12), (Co1/12Al1/12), (Cr1/12Al1/12)) by polymer precursor method and its electrochemical performance for lithium-ion batteries

Cited by 76 publications

References 53 publications

Spinel LiNixMn2−xO4 as cathode material for aqueous rechargeable lithium batteries

Spinel LiNixMn2−xO4 as cathode material for aqueous rechargeable lithium batteries

Studies on Bare and Mg-doped LiCoO2 as a cathode material for Lithium ion Batteries

A Review on Nanocomposite Materials for Rechargeable Li-ion Batteries

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