Multifunctional radical polymers-enabled rapid charge/discharge and high capacity for flexible self-standing LiFePO4/PETM/SWNT hybrid electrodes

Chen, Yaoguang; Chen, Ling; Jiang, Li; Zhu, Xuheng; Li, Fuzhen; Liu, Xiu; Mai, Kancheng; Zhang, Zishou; Fan, Xuliang; Lv, Xiaodong

doi:10.1016/j.cej.2024.149008

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…In particular, for the year of 2023, among the three mainstream power batteries (LiFePO 4 , LiNiCoMnO 2 , and LiMnO 2 ), 67.3% of the power batteries installed in domestic new energy vehicles were LiFePO 4 batteries, based on the data reported by the China Automotive Battery Innovation Alliance. As for the high demand for electric vehicle cruise range per charge, further boosting the energy density of LiFePO 4 batteries suffers from the limitation of available battery assembly technology and lower operating potential (3.4 V vs. Li/Li + ), as well as the theoretical capacity of 170 mAh/g (578 Wh kg −1 ) [6][7][8]. In view of the highly stable olivine framework, one way to increase the energy density is the replacement of Fe by Mn to form LiMnPO 4 or LiMn 1−y Fe y PO 4 .…”

Section: Introductionmentioning

confidence: 99%

Freeze-Drying-Assisted Preparation of High-Compaction-Density LiMn0.69Co0.01Fe0.3PO4 Cathode Materials with High-Capacity and Long Life-Cycle for Lithium Ion Batteries

Liu,

Zheng,

Huang

et al. 2024

Batteries

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As a successor to LiFePO4, the research interest in LiMn1−yFeyPO4 has been sustained due to its higher working voltage and safety features. However, its further application is limited by the low compaction density caused by uncontrolled particle size. In this study, the high-quality LiMn0.69Co0.01Fe0.3PO4 (LMFP) materials were prepared using the freeze-drying method to process the LMFP precursor synthesized through a solvothermal crystallization method followed by a calcination process at different temperatures (400–550 °C). The results demonstrate that the obtained particles exhibit a spheroidal shape with a low specific surface area after secondary crystallization calcination at 700 °C. The compaction density increased from 1.96 g/cm3 for LMFP precursor (LMFP-M1) to 2.18, 2.27, 2.34, and 2.43 g/cm3 for samples calcined at 400, 450, 500 and 550 °C, respectively, achieving a maximum increase of 24%. The full cell constructed with the high-compaction-density material calcined at 500 °C displayed discharge capacities of 144.1, 143.8, and 142.6 mAh/g at 0.5, 1, and 3 C rates, respectively, with a retention rate of 99% at 3 C rate. After undergoing charging and discharging cycles at a rate of 1 C for up to 800 cycles, the capacity retention rate was found to be 90%, indicating an expected full cell life span exceeding 2500 cycles.

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Section: Introductionmentioning

confidence: 99%