Synthesis and electrochemical properties of multi-doped LiFePO4/C prepared from the steel slag

Wu, Zhaojin; Yue, Haifeng; Li, L.S.; Jiang, B.F.; Wu, Xingrong; Wang, P.

doi:10.1016/j.jpowsour.2009.11.058

Cited by 40 publications

(19 citation statements)

References 23 publications

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“…XRD pattern indicates that the EN-LiFePO 4 /C sample is single phase in olivine-type of Pnma space group, and no impurity phase is observed. In the fitting process, the dopants of Ni, Co, Mn were supposed to occupy Fe site [27][28][29]. The observed pattern and calculated pattern match well in this case, and the agreement factors are satisfactory (R wp = 9.16%, R p = 6.78%).…”

Section: Characterizationsupporting

confidence: 53%

“…Tremendous efforts have been made to overcome the inherent limitations of LiFePO 4 , such as carbon coating [2][3][4], particle size reducing [5][6][7], and ion doping. Especially various ion dopings were focused, including single element doping of Mg, Al, Zr, Ni, Co, Mo, Na, Mn, Zn, Nd, Nb, Rh, Cu, V, Ti, Sn, F [8][9][10][11][12][13][14][15][16][17][18][19][20][21], two elements co-doping of Ni-Mn, Mg-Ti, Mg-F, Na-Ti, Na-Cl [22][23][24][25][26], and multi-doping of Zn-Mn-Ca, Mn-V-Cr, Mg-Al-Zn-Mn [27][28][29]. The promoting effect was attributed to the improved intrinsic electronic conductivity and the increased lithium ion diffusion coefficient in doped LiFePO 4 particles.…”

Section: Introductionmentioning

confidence: 99%

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A novel preparation route for multi-doped LiFePO4/C from spent electroless nickel plating solution

Liu

Huang

2015

Journal of Alloys and Compounds

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Section: Characterizationsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

A novel preparation route for multi-doped LiFePO4/C from spent electroless nickel plating solution

Liu

Huang

2015

Journal of Alloys and Compounds

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“…The liberation degree of a mineral (L) is defined by Equation (1): (1) in which qf is content of free particles, and ql is content of locked particles. In this work, the particle counting method was used to calculate the liberation degree of C2S, and the calculation Equation is as follows: (2) in which Nf is the number of C2S free particles, and Nl is the number of C2S locked particles. The liberation degree of C2S in the upper and lower modified slags as calculated by Equation (2) (2) in which Nf is the number of C2S free particles, and Nl is the number of C2S locked particles.…”

Section: Liberation Degree Of P-rich C2s In the Modified Slagmentioning

confidence: 99%

“…In this work, the particle counting method was used to calculate the liberation degree of C2S, and the calculation Equation is as follows: (2) in which Nf is the number of C2S free particles, and Nl is the number of C2S locked particles. The liberation degree of C2S in the upper and lower modified slags as calculated by Equation (2) (2) in which Nf is the number of C2S free particles, and Nl is the number of C2S locked particles. The liberation degree of C2S in the upper and lower modified slags as calculated by Equation (2) After respectively grinding the upper and lower slags, the liberation degree of C 2 S was determined by SEM.…”

Section: Liberation Degree Of P-rich C2s In the Modified Slagmentioning

confidence: 99%

“…The other is the external recycling of it as building materials, agricultural fertilizer, functional materials, etc. [1][2][3][4][5][6]. The internal recycling of steel slag is considered to be the best method because calcium, magnesium, manganese, vanadium, iron, rare elements, etc., in the slag can be recovered, and a large portion of slagging agents, such as limestone and fluorite, can be saved [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Growth, Stratification, and Liberation of Phosphorus-Rich C2S in Modified BOF Steel Slag

Rao

Dong

Gui³

et al. 2020

Materials

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Basic oxygen furnace (BOF) slag was modified by adding 3.5% SiO2 and holding at 1673 K for 0, 5, 40, 90, 240, or 360 min. Kilo-scale modification was also carried out. The growth, stratification, and liberation of P-rich C2S in the modified slag were investigated. The optimum holding time was 240 min, and 90% of C2S grains were above 30 μm in size. The phosphorus content increased with holding time, and after modification, the phosphorus content in C2S was nearly three times higher than that in the original slag (2.23%). Obvious stratification of C2S was observed in the kilo-scale modification. Upper C2S particles with a relatively larger size of 20–110 μm was independent of RO (FeO-MgO-MnO solid solution) and spinel, which is favorable for liberation. Lower C2S was less than 3 μm and was embedded in spinel, which is not conducive to liberation. The content of phosphorus in upper C2S (6.60%) was about twice that of the lower (3.80%). After grinding, most of the upper C2S existed as free particles and as locked particles in the lower. The liberation degree of C2S in the upper increased with grinding time, from 86.02% to 95.92% in the range of 30–300 s, and the optimum grinding time was 180 s. For the lower slag grinding for 300 s, the liberation degree of C2S was 40.07%.

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Recycling Iron‐Containing Sludges from the Electroflocculation of Printing and Dyeing Wastewater into Anode Materials for Lithium‐Ion Batteries

Gang

Shen

Ma³

et al. 2020

ChemSusChem

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Iron‐containing sludges (DW/Fe) were prepared by the electroflocculation of industrial printing and dyeing wastewater (DW). To investigate the formation process and the properties of the DW/Fe sludges and their application in anode materials in Li‐ion batteries, the DW/Fe sludges were compared to three other sludges (MB/Fe, RB/Fe, Ta/Fe) prepared from model solutions that contained either methyl blue (MB), rhodamine B (RB), or tartrazine (Ta). The DW/Fe sludges were calcined at 500 °C under N2 to form iron oxide/carbon composite C‐DW/Fe. The composition and structure of the sludges and the C‐DW/Fe composite were analyzed by using FTIR spectroscopy, XRD, thermogravimetric analysis, SEM, TEM, and X‐ray photoelectron spectroscopy, and their performances as anodes of Li‐ion batteries were studied by adding different proportions of conductive agent (super P® conductive carbon black). Our results show that the sludges are a complex mixture of Fe3O4 and organic matter. The specific capacity and stability can be improved during the charge–discharge test by increasing the amount of carbon black. Importantly, this improvement is more pronounced on DW/Fe that does not require high‐temperature carbonization, which means that the sludges cannot only protect the environment and avoid the waste of resources but also can be used directly and widely in decentralized energy storage devices.

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Synthesis and electrochemical properties of multi-doped LiFePO4/C prepared from the steel slag

Cited by 40 publications

References 23 publications

A novel preparation route for multi-doped LiFePO4/C from spent electroless nickel plating solution

A novel preparation route for multi-doped LiFePO4/C from spent electroless nickel plating solution

Growth, Stratification, and Liberation of Phosphorus-Rich C2S in Modified BOF Steel Slag

Recycling Iron‐Containing Sludges from the Electroflocculation of Printing and Dyeing Wastewater into Anode Materials for Lithium‐Ion Batteries

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