Improving electrochemical properties of porous iron substituted lithium manganese phosphate in additive addition electrolyte

Kim, Jae Kwang; Vijaya, R.; Zhu, Likun; Kim, Young‐Sik

doi:10.1016/j.jpowsour.2014.11.028

Cited by 26 publications

(9 citation statements)

References 19 publications

(22 reference statements)

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“…Encouraged by the above‐mentioned methods and combination of other novel strategies, such as optimization of experimental conditions (such as calcinations temperature and time, selection of precursors and carbon sources, and optimization of Fe/Mn ratio), special morphology design, cation/anion doping, and surface coating/compositing by other conductive agents or lithium ion conductor, investigation on the improvement of the electrochemical performances and thermal stability of LFMP‐based cathode materials has always been a hot spot in the very recent years. A number of Mn‐rich LiFe 1‐ y Mn y PO 4 /C (0.5 ≤ y < 1.0) cathode materials with high specific capacity, superior rate performance, and excellent cycle stability have also been reported …”

Section: Strategies For Improvement Of the Performances Of Life1‐ymnypo4mentioning

confidence: 99%

“…Typical novel approaches employed in fabricating LFMP‐based cathode materials attempted to improve the electrochemical performance of LiFe 1‐ y Mn y PO 4 are listed in Table 1 and also shown in Figure 13 . These synthesis methods mainly include solvothermal method, co‐precipitation method, high‐energy ball‐milling (HEBM)‐assisted solid state reaction, sol‐gel route, carbon gel‐combustion synthesis process, (microwave‐assisted) hydrothermal route and spray drying method . It is noted that annealing in inert atmospheres can enhance the electrochemical performances of LFMP‐based cathode materials obtained by most of the above‐mentioned methods, which suggests it is a necessary process to obtain LFMP‐based materials for practical application.…”

Section: Strategies For Improvement Of the Performances Of Life1‐ymnypo4mentioning

confidence: 99%

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Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Deng

Yang

Zou

et al. 2017

Advanced Energy Materials

116

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LiMnPO 4 (LMP) is one of the most potential candidates for high energy density (≈700 W h kg -1 ) lithium ion batteries (LIBs). However, the intrinsically low electronic conductivity and lithium ion diffusion coefficient of LMP result in its low performance. To overcome these challenges, it is an effective approach to prepare nanometer-sized Fe-doping LMP (LFMP) materials through optimization of the preparation routes. Moreover, surface coating can improve the ionic and electronic conductivity, and decrease the interfacial side reactions between the nanometer particles and electrolyte. Thus, a uniform surface coating will lead to a significant enhancement of the electrochemical performance of LFMP. Currently, considerable efforts have been devoted to improving the electrochemical performance of LiFe 1-y Mn y PO 4 (0.5 ≤ y < 1.0) and some important progresses have been achieved. Here, a general overview of the structural features, typical electrochemical behavior, delithiation/ lithiation mechanisms, and thermodynamic properties of LiFe 1-y Mn y PO 4based materials is presented. The recent developments achieved in improvement of the electrochemical performances of LiFe 1-y Mn y PO 4 -based materials are summarized, including selecting the synthetic methods, nanostructuring, surface coating, optimizing Fe/Mn ratios and particle morphologies, cation/ anion doping, and rational designing of LFMP-based full cells. Finally, the critical issues at present and future development of LiFe 1-y Mn y PO 4 -based materials are discussed.of LIBs. [3,4] Investigation on the design and preparation of high performance cathode materials has received extensive attention from academic and industrial research worldwide. The first successful example of LiCoO 2 discovered by Goodenough and his co-workers in 1980 is a dominating cathode material in commercial portable electronic devices. [5] It displays medium specific capacity and high compaction density when it is employed as a cathode material in the fabrication of electrode, resulting in its high energy density. In order to improve the safety of LIBs, decrease the cost and to enhance specific capacity, researchers have been trying to find other efficient materials. Many oxide-based positive insertion materials, such as LiMn 2 O 4 , [6] LiMn 1.5 Ni 0.5 O 4 , [7] LiNi 0.8 Co 0.15 Al 0.05 O 2 [8]and LiMn 0.33 Co 0.33 Ni 0.33 O 2[9] were proposed as possible alternatives to the existing layered LiCoO 2 cathodes because of its own shortcomings, such as the toxicity and high cost of cobalt as well as its poor thermal stability. [10] Figure 1 illustrates crystal structures and discharge curves for some typical cathode materials, including layered LiCoO , spinel LiNi 0.5 Mn 1.5 O 4 and olivine LiFePO 4 , in which spinel and olivine materials show flat potential plateaus, while layered materials display sloping potential profiles. [11] Besides the transition metal oxides-based cathode materials, phospho-olivines introduced firstly by Goodenough and co-workers in 1997 as cathode materials for L...

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Section: Strategies For Improvement Of the Performances Of Life1‐ymnypo4mentioning

confidence: 99%

Section: Strategies For Improvement Of the Performances Of Life1‐ymnypo4mentioning

confidence: 99%

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Deng

Yang

Zou

et al. 2017

Advanced Energy Materials

116

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“…LiFe 0.6 Mn 0.4 PO 4 /C was synthesized by a modified sol‐gel method . The raw materials to synthesize it include LiH 2 PO 4 (3.2977 g), FeC 2 O 4 ⋅2 H 2 O (3.4265 g), Mn(COOCH 3 ) 2 ⋅4 H 2 O (3.1104 g) (All 99 %) and citric acid (9.3282 g) (Shinyo Pure Chemicals, 99 %).…”

Section: Methodsmentioning

confidence: 99%

Compatibility between Lithium Bis(oxalate)borate‐Based Electrolytes and a LiFe_0.6Mn_0.4PO₄/C Cathode for Lithium‐Ion Batteries

Zhao

Tang

et al. 2016

Energy Tech

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The lithium transition‐metal phosphate LiFe0.6Mn0.4PO4 has two operating potentials, 3.5 V and 4.1 V, which is favorable for increasing the energy and power densities of lithium‐ion batteries (LIBs). To study the compatibility between LiFe0.6Mn0.4PO4 and electrolytes, lithium bis(oxalate)borate (LiBOB) is chosen as the lithium salt, based upon ethylene carbonate (EC), dimethyl carbonate (DMC), and dimethyl sulfite (DMS) as the supporting electrolyte solvents. The electrochemical performances of lithium hexafluorophosphate (LiPF6)‐based and LiBOB‐based electrolytes are compared. The combination of LiBOB and DMS can facilitate the formation of an effective passivation film. In addition, LiBOB‐EC/DMS electrolyte exhibits better cycle and rate performance. The results suggest that LiBOB‐EC/DMS electrolyte has good compatibility with LiFe0.6Mn0.4PO4, which makes it an attractive electrolyte for rechargeable LIBs based upon LiFe0.6Mn0.4PO4 cathodes.

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“…However, LiMnPO 4 suffers from low electronic conductivity (<10 -10 S cm -1 ), [11][12][13] low Li + diffusion coefficient, [14,15] local structure distortion caused by Jahn-Teller effect of active Mn 3+ ions [16] and a large cell volume change between LiMnPO 4 and MnPO 4 during the charge/discharge process. [17,18] To overcome these shortcomings, different strategies have been adopted to optimize the properties of LiMnPO 4 by using nanoscale particles, [19] doping, [20][21][22] carbon coating, [23,24] conductive additive loading, [25] and various synthesis techniques. [26][27][28][29][30][31] Thereinto, Fe substitution has been proved to be more effective to improve the electrochemical characteristics of LiMnPO 4 cathode material and is promising for large-scale applications.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of LiMn0.75Fe0.25PO4/C Nanocomposite Cathode Materials of Lithium-Ion Batteries through Microwave Sintering

Hou¹,

Hou²,

Zhang³

et al. 2020

Eng. Sci.

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LiMn 0.75 Fe 0.25 PO 4 /C nanocomposites are synthesized by a facile hydrothermal and ball-milling method, combining with spraydrying and microwave sintering process. X-ray diffractometer (XRD) and scanning electron microscopy (SEM) results reveal that the sintering process has a strong effect on the structures and morphologies of the as-prepared powders, and thus on the subsequent electrochemical performance. The lattice parameters (a, b, and c) of the microwave sintered sample are all smaller than those of the ordinary sintered sample. Meanwhile, compared to 299.66 Å 3 of unit cell volume for the ordinary heating sintered sample, the value of the microwave sintered sample is 299.15 Å 3 . Transmission electron microscope (TEM) displays that the grains of the microwave sintered sample are less than 50 nm. The microwave sintered sample presents an excellent electrochemical performance with a discharge capacity of 143.5 mAh g -1 and capacity retention of 94.3% after 225 cycles at a rate of 0.1 C. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) show that the microwave sintered electrode has a smaller charge-transfer resistance and a minor polarization and thus results in improved electrode kinetics. The microwave sintering is an economic, energy-saving, and time-saving synthetic method, which has great industrial application prospects.

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Improving electrochemical properties of porous iron substituted lithium manganese phosphate in additive addition electrolyte

Cited by 26 publications

References 19 publications

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Compatibility between Lithium Bis(oxalate)borate‐Based Electrolytes and a LiFe_0.6Mn_0.4PO₄/C Cathode for Lithium‐Ion Batteries

Facile Synthesis of LiMn0.75Fe0.25PO4/C Nanocomposite Cathode Materials of Lithium-Ion Batteries through Microwave Sintering

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Improving electrochemical properties of porous iron substituted lithium manganese phosphate in additive addition electrolyte

Cited by 26 publications

References 19 publications

Recent Advances of Mn‐Rich LiFe1‐yMnyPO4 (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe1‐yMnyPO4 (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Compatibility between Lithium Bis(oxalate)borate‐Based Electrolytes and a LiFe0.6Mn0.4PO4/C Cathode for Lithium‐Ion Batteries

Facile Synthesis of LiMn0.75Fe0.25PO4/C Nanocomposite Cathode Materials of Lithium-Ion Batteries through Microwave Sintering

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Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Recent Advances of Mn‐Rich LiFe_1‐_yMn_yPO₄ (0.5 ≤ y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries

Compatibility between Lithium Bis(oxalate)borate‐Based Electrolytes and a LiFe_0.6Mn_0.4PO₄/C Cathode for Lithium‐Ion Batteries