Graphene-embedded LiMn0.8Fe0.2PO4 composites with promoted electrochemical performance for lithium ion batteries

Wen, Fang; Lv, Tu'an; Gao, Ping; Wu, Bing; Liang, Qianqian; Zhang, Yuanyuan; Shu, Hongbo; Yang, Xiukang; Liu, Li; Wang, Xianyou

doi:10.1016/j.electacta.2018.04.157

Cited by 23 publications

(3 citation statements)

References 39 publications

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“…The discharge specific capacity of the LiMn 0.8 Fe 0.2 PO 4 /C material also reached a peak of 152.5 mAh•g −1 . Therefore, the LiMn 0.8 Fe 0.2 PO 4 /C material had the smallest degree of polarization during charging and discharging among several prepared materials, and had the highest specific discharge capacity and battery energy density [26]. At the same time, it was confirmed that the Mn site was successfully partially replaced by Fe, and Fe substitution had a positive effect on the two-phase transition between the charge/discharge reactions.…”

Section: Electrochemical Analysismentioning

confidence: 83%

“…The calculated lattice parameters decrease linearly along with the shrink of the unit cell with the increase of the Fe-doping amount, and the change is approximately linear, which was consistent with Vegard's law. This indicated that Fe 2+ doping could cause the lattice shrinkage of LiMnPO 4 , but the crystal structure of LiMnPO 4 was not affected [26,29]. Thus, it can be seen that Fe 2+ was successfully embedded in the olivine structure of LiMnPO 4 .…”

Section: Phase Structure Analysismentioning

confidence: 92%

“…The introduction of Mn 2+ in the lattice can widen the lithiumion diffusion channel to some extent, and the presence of Fe 2+ can improve electrode kinetics. The interaction between them [25,26] makes LiFe 1-x Mn x PO 4 /C solid solution exhibit excellent electrochemical performances and kinetic properties.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Fe2+ Substituted High-Performance LiMn1−xFexPO4/C (x = 0, 0.1, 0.2, 0.3, 0.4) Cathode Materials for Lithium-Ion Batteries via Sol-Gel Processes

Fang

Jin²,

Xie

et al. 2021

Molecules

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A series of carbon-coated LiMn1−xFexPO4 (x = 0, 0.1, 0.2, 0.3, 0.4) materials are successfully constructed using glucose as carbon sources via sol-gel processes. The morphology of the synthesized material particles are more regular and particle sizes are more homogeneous. The carbon-coated LiMn0.8Fe0.2PO4 material obtains the discharge specific capacity of 152.5 mAh·g−1 at 0.1 C rate and its discharge specific capacity reaches 95.7 mAh·g−1 at 5 C rate. Iron doping offers a viable way to improve the electronic conductivity and lattice defects of materials, as well as improving transmission kinetics, thereby improving the rate performance and cycle performance of materials, which is an effective method to promote the electrical properties.

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Section: Electrochemical Analysismentioning

confidence: 83%

Section: Phase Structure Analysismentioning

confidence: 92%