Influence of anion species on the morphology of solvothermal synthesized LiMn0.9Fe0.1PO4

Dai, Zhongjia; Wang, Li; Ye, Feipeng; Huang, Chaochao; Wang, Jixian; Huang, Xiankun; Wang, Jianlong; Tian, Guangyu; He, Xiangming; Ouyang, Minggao

doi:10.1016/j.electacta.2014.04.081

Cited by 18 publications

(11 citation statements)

References 29 publications

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“…Different reactivity of Mn 2+ and Fe 2+ during the solvothermal reaction may be responsible for this observation. Similar phenomenon for LiMn 0.9 Fe 0.1 PO 4 has also been reported [ 8 ]. The difference in Mn–Fe between feeding and product seems difficult to eliminate.…”

Section: Resultssupporting

confidence: 88%

“…Firstly, synthesis by hydrothermal or solvothermal suffers from the segregation of LiMnPO 4 or LiFePO 4 . Due to different chemical activities among various cations [ 5 , 6 , 7 , 8 ], the co-precipitation of Mn 2+ and Fe 2+ by a soft chemistry method needs careful control of pH value, concentration, raw material, and solvent, even though the Mn 2+ –Fe 2+ proportion in the co-precipitation generally falls in a limited range. Secondly, the synthesis through solid-state reaction suffers from poor batch uniformity, which might be caused by the nonuniform cation diffusion or phase separation during the solid reaction process.…”

Section: Introductionmentioning

confidence: 99%

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The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

Wang

Dai

et al. 2016

Materials

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LiMnxFe1−xPO4/C material has been synthesized through a facile solid-state reaction under the condition of carbon coating, using solvothermal-prepared LiMnPO4 and LiFePO4 as precursors and sucrose as a carbon resource. XRD and element distribution analysis reveal completed solid-state reaction of precursors. LiMnxFe1−xPO4/C composites inherit the morphology of precursors after heat treatment without obvious agglomeration and size increase. LiMnxFe1−xPO4 solid solution forms at low temperature around 350 °C, and Mn2+/Fe2+ diffuse completely within 1 h at 650 °C. The LiMnxFe1−xPO4/C (x < 0.8) composite exhibits a high-discharge capacity of over 120 mAh·g−1 (500 Wh·kg−1) at low C-rates. This paves a way to synthesize the crystal-optimized LiMnxFe1−xPO4/C materials for high performance Li-ion batteries.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

Wang

Dai

et al. 2016

Materials

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“…The porous LFMP/CNF free‐standing cathode with N‐doped carbon coating was successfully achieved by IL‐assisted electrospinning method. The resulting composite cathode (denoted as LFMP/CNF‐IL) shows excellent electrochemical performances involved superior rate capability and cyclability due to the enhancement of conductivity and pseudocapacitive contribution . Furthermore, the IL‐assisted electrospinning approach presented here is scalable and can be extended to other electrospinning systems that involve phosphate‐based free‐standing electrodes.…”

Section: Figurementioning

confidence: 98%

Ionic Liquid Assisted Electrospinning of Porous LiFe_0.4Mn_0.6PO₄/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries

Yang

Tan

et al. 2020

Chemistry A European J

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In pursuit of high-performance cathode materials for lithium-ion batteries with high energy andp ower densities, porous LiFe 0.4 Mn 0.6 PO 4 /CNF free-standing electrodes have been successfullyp repared through af acile ionic liquid (IL) assistede lectrospinning method. Owingt o the hierarchical porosity and N-doped carbon layer derived from the ionic liquid,t he resulting electrodes exhibited superior electrochemical performances with an improvement of conductivity and pseudocapacitive contribution,d elivering ad ischarge capability of 162.7, 133.5, 114.5, and 102.6 mAh g À1 at the current rates of 0.1, 1, 5, and 10 C, respectively.I ti sh ighlye xpected that this facile IL-assisted electrospinning method will lead to furtherd evelopments for other phosphate-basedfree-standing electrodes,w hich offersanew route in designing polyanionic cathodes for high-performanceL i-ion batteries.[a] Dr.

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“…Since the original work of Goodenough Group [1] was published in 1997, olivine-type compounds LiMPO 4 (M = Mn, Fe, Co, Ni) have been investigated extensively as promising cathode materials for lithium-ion batteries [2][3][4][5][6][7][8][9][10][11][12]. Among these compounds, LiFePO 4 has been successfully applied in commercial industry [13].…”

Section: Introductionmentioning

confidence: 99%

“…During the past two decades, significant efforts have been made to improve LiMnPO 4 material [5][6][7][8][9][10][11][12]. The electrochemical performance of this material was enhanced by conductive additive coating [19][20][21][22], particle size reduction [23][24][25][26][27] and cation doping or subsitution [28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Cycling Stability of LiMnPO4 at Elevated Temperature by Fe-Mg co-Substitution

Hu¹

2018

International Journal of Electrochemical Science

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Olivine-type LiMnPO 4 has been extensively investigated as a promising cathode material for the nextgeneration high performance Li-ion batteries due to its high working voltage (4.1 V vs Li + /Li) and high theoretical specific capacity (170 mAh g −1). However, poor cycling performance at elevated temperature hinders its practical application. Here carbon coating and Fe-Mg co-substitution of LiMnPO 4 is attempted by a facile solid-state process. To substitute the smaller Fe 2+ ions and Mg 2+ ions for the larger Mn 2+ ions strengthens the Mn-O bond, which makes the structure of LiMnPO 4 more stable. Hence, Mn dissolution in the electrolyte is retrained. The obtained LiMn 0.9 Fe 0.09 Mg 0.01 PO 4 /C material presents a high discharge capacity (160 mAh g −1 at 0.1 C) and excellent cycling performance at elevated temperature. Even at a high rate of 1 C, it delivers a capacity of about 135 mAh g −1 at 50 °C without capacity fade after 120 cycles.

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Influence of anion species on the morphology of solvothermal synthesized LiMn0.9Fe0.1PO4

Cited by 18 publications

References 29 publications

The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

Ionic Liquid Assisted Electrospinning of Porous LiFe_0.4Mn_0.6PO₄/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries

Enhancement of Cycling Stability of LiMnPO4 at Elevated Temperature by Fe-Mg co-Substitution

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Influence of anion species on the morphology of solvothermal synthesized LiMn0.9Fe0.1PO4

Cited by 18 publications

References 29 publications

The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

The Synthesis of LiMnxFe1−xPO4/C Cathode Material through Solvothermal Jointed with Solid-State Reaction

Ionic Liquid Assisted Electrospinning of Porous LiFe0.4Mn0.6PO4/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries

Enhancement of Cycling Stability of LiMnPO4 at Elevated Temperature by Fe-Mg co-Substitution

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Ionic Liquid Assisted Electrospinning of Porous LiFe_0.4Mn_0.6PO₄/CNFs as Free‐Standing Cathodes with a Pseudocapacitive Contribution for High‐Performance Lithium‐Ion Batteries