Ionothermal synthesis and electrochemical analysis of Fe doped LiMnPO4/C composites as cathode materials for lithium-ion batteries

Li, Xueliang; Liu, Shuai; Jin, Hongchang; Yu, Meng; Liu, Yunfu

doi:10.1016/j.jallcom.2014.06.085

Cited by 18 publications

(8 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, researches have shown that LiMnPO 4 not only suffers from the intrinsic lower electronic conductivities (10 -10 S cm -1 ) and lithium ion diffusion coefficient (<10 -9 cm 2 s -1 ) than LiFePO 4 (10 -9 S cm -1 and 10 -8 cm 2 s -1 ) [9][10][11][12], but also degrades fast due to Jahn-Teller effect between LiMnPO 4 and MnPO 4 in the charge-discharge process [6,13]. In response to these limitations of LiMnPO 4 , researchers have found that making nano-particles and partial substitution of Mn 2+ by other transition metal ions (such as Fe, Ni, Mg and so on) [14][15][16][17][18][19] are helpful for improving the electrochemical activity. Lu et al [15] have synthesized LiMg 0.05 Mn 0.95 PO 4 nanofiber through an electrospinning method, good electrochemical performance can be achieved (107 mAh g -1 at 5C).…”

Section: Introductionmentioning

confidence: 99%

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Zou

Wang

Qiang

et al. 2016

Electrochimica Acta

View full text Add to dashboard Cite

Ascorbic acid acts as both an antioxidant and a surfactant to form organic groups (first carbon source) on the surface of as-solvothermal products, in which the-OH (or H 2 O) groups of glucose (second carbon source) are closely bonded to the surface to form a uniform adsorption layer. Uniform mixed-carbon-coated LiMn 0.4 Fe 0.6 PO 4 nanopowders are formed after calcination, which demonstrate excellent electrochemical performances.

show abstract

Section: Introductionmentioning

confidence: 99%

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Zou

Wang

Qiang

et al. 2016

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…As shown in figure 5, all the impedance plots consist of a depressed semicircle in the high-to-medium frequency region and a slopping line in the low frequency region. The straight line is attributed to the diffusion of lithium ions and the semicircle is related to the charge transfer between the electrolyte and the active material [4,6,23]. The impedance data was analyzed by fitting to an equivalent electrical circuit (inset).…”

Section: Resultsmentioning

confidence: 99%

“…Nowadays, the development of rechargeable lithium-ion batteries (LIBs) with better rate capability, longer cycling life and higher energy density is of great interest to accommodate the applications in more powerful plug-in hybrid vehicles or electric vehicles [1][2][3][4][5][6][7]. LiMnPO 4 , as a new olivine structural material, has been widely studied due to its higher theoretical energy density of 684 Wh kg −1 compared to the commercial LiFePO 4 (LiFePO 4 : 578 Wh kg −1 ) [3,[8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Rational design of the micron-sized particle size of LiMn_0.8Fe_0.2PO₄cathode material with enhanced electrochemical performance for Li-ion batteries

Yang

Chang

Xie

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

Recently, micron-sized LiMn 1−x Fe x PO 4 cathode materials have attracted attention due to its better rate capability and higher tap density than the nano-sized ones. However, the influence of the particle size on the energy density of micron-sized LiMn 1−x Fe x PO 4 is still unknown. In this paper, we report the optimal particle size of the micron-sized LiMn 0.8 Fe 0.2 PO 4 with enhanced electrochemical performance as cathode material in lithium-ion batteries (LIBs). The LiMn 0.8 Fe 0.2 PO 4 sample with the particle size of ∼9.39 μm delivers the initial discharge capacity of 124 mAh g −1 at 0.2 C rate with high capacity retention of 94.35% after 100 cycles, which is higher than that with the particle sizes of ∼2.71 μm, ∼3.74 μm, ∼6.41 μm or ∼16.31 μm. This structure with the specific capacity of 122 mAh g −1 at 0.5 C rate and 106 mAh g −1 at 3 C rate also exhibits excellent rate performances. The improved electrochemical performances are mainly derived from its fast Li + diffusion, which causes the higher ionic conductivity. The LiMn 0.8 Fe 0.2 PO 4 sample with the particle sizes of ∼9.39 μm also shows the highest tap density (0.68 g cc −1 ) among the as-prepared samples. This finding provides a new way to enhance the energy density of other cathode materials.

show abstract

“…The Li + diffusion coefficient of materials can be obtained from the following equation [Eq. (1)]: [33,34]…”

Section: Resultsmentioning

confidence: 99%

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating

Kou

Zhang

et al. 2020

ChemElectroChem

View full text Add to dashboard Cite

The nickel-rich LiNi 0.91 Co 0.06 Al 0.03 O 2 cathode material has attracted wide attention due to its high energy density and appropriate thermal stability; however, its practical application has been greatly restricted by exorbitant residual LiOH/Li 2 CO 3 and poor cycling performance. In this work, we have reduced the residual LiOH/Li 2 CO 3 by washing the LiNi 0.91 Co 0.06 Al 0.03 O 2 fabricated through a high-temperature solid-state method and improved the cycling performance with a composite coating process. The results show that the amount of residual LiOH/ Li 2 CO 3 in the washed materials is significantly decreased, which is very favorable for the processability of materials. Li-Ni 0.91 Co 0.06 Al 0.03 O 2 with 0.1 wt% composite coating exhibits optimum properties: the discharge capacity reaches 217.4 mAh/ g at 0.1 C, the cycling retention still remains at 93.7 % after 100 cycles at 1 C, and the cycling retention of the soft-packing battery remains as high as 81.7 % after 800 cycles at 1 C. The excellent electrochemical performances are attributed to the synergistic effect of excellent fluidity of H 3 BO 3 and outstanding stability of Y 2 O 3 , mitigating the interface reaction between electrolyte and cathode material.

show abstract

Ionothermal synthesis and electrochemical analysis of Fe doped LiMnPO4/C composites as cathode materials for lithium-ion batteries

Cited by 18 publications

References 42 publications

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Rational design of the micron-sized particle size of LiMn_0.8Fe_0.2PO₄cathode material with enhanced electrochemical performance for Li-ion batteries

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating

Contact Info

Product

Resources

About

Ionothermal synthesis and electrochemical analysis of Fe doped LiMnPO4/C composites as cathode materials for lithium-ion batteries

Cited by 18 publications

References 42 publications

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Mixed-carbon-coated LiMn0.4Fe0.6PO4 nanopowders with excellent high rate and low temperature performances for lithium-ion batteries

Rational design of the micron-sized particle size of LiMn0.8Fe0.2PO4cathode material with enhanced electrochemical performance for Li-ion batteries

Improving Electrochemical Cycling Stability of Ni‐rich LiNi0.91Co0.06Al0.03O2 Cathode Materials through H3BO3 and Y2O3 Composite Coating

Contact Info

Product

Resources

About

Rational design of the micron-sized particle size of LiMn_0.8Fe_0.2PO₄cathode material with enhanced electrochemical performance for Li-ion batteries

Improving Electrochemical Cycling Stability of Ni‐rich LiNi_0.91Co_0.06Al_0.03O₂ Cathode Materials through H₃BO₃ and Y₂O₃ Composite Coating