Synthesis and Characterization of LiMnPO
                
                  
                
                $$_{4}$$
                
                  
                    
                      
                      4
                    
                  
                
               Cathode Material via Dittmarite-Type 
                
                  
                
                $$\hbox {NH}_{4}\hbox {MnPO}_{4}{\cdot }\hbox {H}_{2}\hbox {O}$$

Khalfaouy, Redouan El; Elabed, Alae; Addaou, Abdellah; Laajeb, Ali; Lahsini, Ahmed

doi:10.1007/s13369-018-3248-5

Cited by 12 publications

(6 citation statements)

References 24 publications

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“…The fundamental characteristics peaks of

{PO}_{4}^{3 -}

(bending modes) associated with MnAP are noted in the region 400 cm −1 ‐1000 cm −1 23,37 . The NH and OH bending modes in the composite are noted respectively at 1440 cm −1 and 1580 cm −1 in the lower wavenumber region and their respective stretching modes are noted in the higher wavenumber region at 3343 cm −1 and 3459 cm −1 37 . The two distinct co‐folded humps traced at 1334 cm −1 and 1573 cm −1 are corresponding to Raman D and G bands respectively 38 .…”

Section: Resultsmentioning

confidence: 98%

“…23,37 The N H and O H bending modes in the composite are noted respectively at 1440 cm À1 and 1580 cm À1 in the lower wavenumber region and their respective stretching modes are noted in the higher wavenumber region at 3343 cm À1 and 3459 cm À1 . 37 The two distinct co-folded humps traced at 1334 cm À1 and 1573 cm À1 are corresponding to Raman D and G bands respectively. 38 The I D and I G intensity convolutions refer to defects and distribution of carbon materials.…”

Section: Raman Studiesmentioning

confidence: 96%

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Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

2023

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The electrochemical performance of manganese ammonium phosphate (MnAP) intercalated carbon hollow sphere (CS) at four mass variates has been investigated. The XRD, Raman, SEM, and electrochemical studies reveal that only 50 mg of CS strongly intercalating with MnAP (MnAP@CS2) is observed. The half‐cell test has shown the profound pseudocapacitance for 50 mg intercalated MnAP@CS2 hybrid composite (2545 C g−1 @ 1 A g−1 in KI added 2 M H2SO4) and confirms the imminence of optimal mass concentration of CS with MnAP and the effect of KI redox additive towards enhancing the specific capacity. The supercapattery hybrid device (SBHD) using MnAP@CS2 as the positive electrode and as newly synthesized activated carbon (AC) derived from cucumis melo var agrestis as a negative electrode is examined in pure 3 M H2SO4 and in 0.025 M KI/VOSO4 dual redox additive added 3 M H2SO4. The exquisite complacency requisite on specific capacitance (536 C g−1/149 mAh g−1 @ 1 A g−1 @ 20 A g−1), energy density (80 Wh g−1), and capacity retention (89% for 5000 charge‐discharge cycles) have profusely advocating MnAP@CS2 and AC for SBH device applications.

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“…The fundamental characteristics peaks of

{PO}_{4}^{3 -}

Section: Resultsmentioning

confidence: 98%

Section: Raman Studiesmentioning

confidence: 96%

Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

2023

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“…In the above strategies, doping metal cations at the Mn site of LiMnPO 4 has been shown to be an effective way to improve its electrochemical properties, especially the electronic conductivity 31,32 . (i) Fe 2+ : Liao et al 33 synthesized LiFe x Mn 1− x PO 4 by facile solvothermal synthesis as advanced cathodes with long cycle life and superior rate capability.…”

Section: Introductionmentioning

confidence: 99%

“…[28][29][30] In the above strategies, doping metal cations at the Mn site of LiMnPO 4 has been shown to be an effective way to improve its electrochemical properties, especially the electronic conductivity. 31,32 (i) Fe 2+ : Liao et al 33 synthesized LiFe x Mn 1−x PO 4 by facile solvothermal synthesis as advanced cathodes with long cycle life and superior rate capability. (ii) Mg 2+ : Kontje et al 34 synthesized Mg-doped LiMnPO 4 samples using three different methods and studied their electrochemical properties as cathode materials for lithium-ion batteries.…”

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confidence: 99%

Revelation of the transition‐metal doping mechanism in lithium manganese phosphate for high performance of lithium‐ion batteries

et al. 2022

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Lithium iron phosphate (LiFePO4) has been widely used due to its high theoretical capacity and good cycle stability, but lithium manganese phosphate (LiMnPO4) with a higher operating voltage (4.1 V) has not been used, so it is necessary to conduct theoretical research on its inherent performance improvement strategy. The large‐scale application of LiMnPO4 is limited by its relatively low electronic and ionic conductivity. Improving the electronic and ionic conductivity of electrode materials by selective doping is an effective strategy. To determine the effect of doping of transition metals on the electrochemical properties of LiMnPO4 and to screen out doping models of cathode materials with excellent battery performance, we established all 3d, 4d, and 5d transition‐metal doping models of LiMnPO4. Through screening by first principles, the structural properties, band gap, doping formation energy, elastic properties, isotropy, and lithium/delithium voltage of the above models were compared and analyzed. According to the screening results, LiMnPO4 doped with Sc, Ti, V, Fe, Co, Mo, Rh, Re, and Ir has excellent electrochemical properties and can be used as a good cathode material for lithium‐ion batteries; the inherent mechanism of the above materials is revealed.

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“…The synthesis process was also considered a direct approach to achieving desired performances. For this reason, several methods have been applied to prepare LiMnPO4 with high purity, such as spray-pyrolysis [22,27], sol-gel method [28,29], hydrothermal synthesis [30][31][32][33], precipitation method [34,35] and solution combustion process [36,37]. Among all these methods, some selected ones offer more advantages such as morphology control, better homogeneity, submicron-sized particles, and larger specific surface area with increased electrochemical performances [38,39].…”

Section: Introductionmentioning

confidence: 99%

Modeling and synthesis of carbon-coated LiMnPO4 cathode material: Experimental investigation and optimization using response surface methodology

Khalfaouy

Khallouk

Elabed

et al. 2022

J. Electrochem. Sci. Eng.

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Nanostructured LiMnPO4 cathode materials for lithium-ion batteries (LIBs) have been successfully prepared by a modified solvothermal method under controlled conditions. Polyethylene glycol (PEG-10000) was used as a solvent to optimize the particle size/morphology and as a carbon conductive matrix. In order to investigate the effect of synthesis parameters such as concentration of PEG-10000, reaction time and reaction temperature on the LiMnPO4 phase purity, Response surface methodology was carried out to find variations in purity results across the composition. The purity of all materials was checked using HighScore software by comparing the matched lines score to ones of reference data. As a result, it has been found that the pure phospho-olivine material LiMnPO4 can be synthesized using the following optimum conditions: PEG concentration = 0.1 mol l-1, reaction time = 180 min, and reaction temperature = 250 °C. The as-prepared LiMnPO4 under optimum conditions delivered an initial discharge capacity of 128.8 mAh g-1 at 0.05 C‑rate. The present work provides insights and suggestions for optimizing synthesis conditions of this material, which has been considered the next promising cathode candidate for high-energy lithium-ion batteries.

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Synthesis and Characterization of LiMnPO $$_{4}$$ 4 Cathode Material via Dittmarite-Type $$\hbox {NH}_{4}\hbox {MnPO}_{4}{\cdot }\hbox {H}_{2}\hbox {O}$$

Cited by 12 publications

References 24 publications

Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

Revelation of the transition‐metal doping mechanism in lithium manganese phosphate for high performance of lithium‐ion batteries

Modeling and synthesis of carbon-coated LiMnPO4 cathode material: Experimental investigation and optimization using response surface methodology

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