Enhanced low temperature electrochemical performances of LiFePO4/C by V3+ and F− co-doping

Lv, Yiju; Huang, Bin; Tan, Jia-xu; Jiang, Shiquan; Zhang, Shufen; Wen, Yan-Xuan

doi:10.1016/j.matlet.2018.07.049

Cited by 20 publications

(9 citation statements)

References 20 publications

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“…By selective doping multivalent cations into LFP, Li-deficient solid solutions with good electronic conductivity could be formed. [260][261][262] Li 0.99 La 0.01 Fe 0.9 Mg 0.1 PO 4 /carbon aerogel (CA) cathode was synthesized by doping plus CA coating. La 3+ and Mg 2+ codoped LFP/CA exhibited excellent low-temperature cycling stability and rate capability, delivering a capacity of 120.3 mAh g −1 (1 C) and 85.4 mAh g −1 (10 C) at −20 °C.…”

Section: Lithium Iron Phosphatementioning

confidence: 99%

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

et al. 2022

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With the highest energy density ever among all sorts of commercialized rechargeable batteries, Li‐ion batteries (LIBs) have stimulated an upsurge utilization in 3C devices, electric vehicles, and stationary energy‐storage systems. However, a high performance of commercial LIBs based on ethylene carbonate electrolytes and graphite anodes can only be achieved at above −20 °C, which restricts their applications in harsh environments. Here, a comprehensive research progress and in‐depth understanding of the critical factors leading to the poor low‐temperature performance of LIBs is provided; the distinctive challenges on the anodes, electrolytes, cathodes, and electrolyte–electrodes interphases are sorted out, with a special focus on Li‐ion transport mechanism therein. Finally, promising strategies and solutions for improving low‐temperature performance are highlighted to maximize the working‐temperature range of the next‐generation high‐energy Li‐ion/metal batteries.

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Section: Lithium Iron Phosphatementioning

confidence: 99%

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

et al. 2022

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“…In recent years, lithium iron phosphate (LiFePO 4 ) has become the highly anticipated commercial positive materials for Li-ion batteries because of a reasonable energy value, low price, high safety, and nontoxic elements. − Unfortunately, the inferior electronic conductivity and poor lithium-ion transmission capability strongly impede the commercial development for a high-energy-density battery. − Researchers have carried out various aspects of work to solve these hard problems. − In these modification methods, improving the intrinsic conductivity of LiFePO 4 is still the key problem. The doping of metals is highly effective in improving the intrinsic conductivity of LiFePO 4 . − …”

Section: Introductionmentioning

confidence: 99%

Effect of Ru Doping on the Properties of LiFePO₄/C Cathode Materials for Lithium-Ion Batteries

et al. 2021

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Doping of metals is highly effective in improving electrochemical performance of lithium iron phosphate. Here, based on a first-principles calculation result that Ru doping at the Fe sites has positive effects on promoting the ability of electron and Li+ transmission by reducing the lattice parameter and band gap, as well as the increase in Fermi energy, we constructed Ru-doped LiFe1–x Ru x PO4/C through the sol–gel preparation technology as cathode materials for Li-ion batteries. As a result, LFP-1 (x = 0.01) delivers excellent specific capacities of 162.6 and 110.6 mA h g–1 under 0.1 and 10 C, respectively. At the same time, LFP-1 emerges with excellent cycling performance, with a capacity retention of up to 95.6% after 300 cycles at 5 C. Ru doping is beneficial for improving the lithium diffusion coefficient and electrical conductivity, therefore strongly increasing electrochemical performance. This work represents a significant addition to exploring a new class of lithium iron phosphates with excellent performance in new energy storage and transition systems.

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“…However, it can be seen from Figure h,i that the improvement in the low-temperature performance of cells is still relatively limited. In addition, comparison of the low-temperature performance of LFMP with some similar materials described in the literature is listed in Table − It can be found that the low-temperature performance of the prepared LFMP@B/P–C material is poorer than other similar materials, thereby it needs to further improve the low-temperature performance of LFMP in the future. Furthermore, the too low temperature could cause the solidification of solvents such as ethylene carbonate in the electrolyte, which hinders the diffusion of lithium ions and increases the impedance of the cells.…”

Section: Resultsmentioning

confidence: 99%

Boron and Phosphorus Dual-Doped Carbon Coating Improves Electrochemical Performances of LiFe_0.8Mn_0.2PO₄ Cathode Materials

Tuo

Mao

Ding

et al. 2021

ACS Appl. Energy Mater.

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Although LiMPO4 (M = Fe, Mn) cathode materials have been widely applied in electric vehicles owing to the advantages of excellent safety, cycle stability, and low cost, poor electronic conductivity of LiMPO4 severely limits the further expansion of its applied field. Herein, the LiFe0.8Mn0.2PO4 composite with boron/phosphorus dual-doped carbon coating (LFMP@B/P–C) was fabricated by a sol–gel hydrothermal method. As a result, LFMP@B/P–C exhibits superior rate performance (97.1 mAh g–1 at 20 C) and preferable low-temperature performance (78.2 mAh g–1 at 1 C and −20 °C). It is mainly attributed to the synergistic effect of boron/phosphorus dual-doped carbon coatings, as confirmed by combined experimental characterizations with density functional theory calculations. That is, boron-doped carbon coating offers additional hole carriers, and phosphorus doping provides abundant electron carriers, making it easy for electrons to escape and enter and greatly improving the conductivity of the material. In addition, the phosphorus atom also acts as a bridge so that the carbon coating layer is tightly coated on the surface of the material. This will provide an idea for the research on the modification of cathode materials in the future.

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Enhanced low temperature electrochemical performances of LiFePO4/C by V3+ and F− co-doping

Cited by 20 publications

References 20 publications

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

Effect of Ru Doping on the Properties of LiFePO₄/C Cathode Materials for Lithium-Ion Batteries

Boron and Phosphorus Dual-Doped Carbon Coating Improves Electrochemical Performances of LiFe_0.8Mn_0.2PO₄ Cathode Materials

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Enhanced low temperature electrochemical performances of LiFePO4/C by V3+ and F− co-doping

Cited by 20 publications

References 20 publications

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

Effect of Ru Doping on the Properties of LiFePO4/C Cathode Materials for Lithium-Ion Batteries

Boron and Phosphorus Dual-Doped Carbon Coating Improves Electrochemical Performances of LiFe0.8Mn0.2PO4 Cathode Materials

Contact Info

Product

Resources

About

Effect of Ru Doping on the Properties of LiFePO₄/C Cathode Materials for Lithium-Ion Batteries

Boron and Phosphorus Dual-Doped Carbon Coating Improves Electrochemical Performances of LiFe_0.8Mn_0.2PO₄ Cathode Materials