Enhanced properties of LiFePO4/C cathode materials co-doped with V and F ions via high-temperature ball milling route

Li, Xuetian; Yu, Lina; Cui, Yonghui; Li, Axiang; Shao, Hongmei; Shao, Zhongcai; Zhang, Wei

doi:10.1016/j.ijhydene.2019.08.187

Cited by 17 publications

(3 citation statements)

References 36 publications

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“…The slope in the low-frequency region is Warburg impedance, which is related to the diffusion of Li + within the active material. 47 The LFP/PPT sample has the smallest semicircle diameter in the midfrequency region. From Table IV, it can be seen that the R ct of the LFP/ PPT is 45.38 Ω, which is smaller than LFP/P (97.10 Ω), LFP/ PP (58.84 Ω) and LFP/PT (72.41 Ω) sample, indicating that LFP/ PPT has the best charge transfer kinetics.…”

Section: Resultsmentioning

confidence: 99%

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

Li,

Gu,

Yang

et al. 2024

J. Electrochem. Soc.

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High volumetric energy density LiFePO4/C cathode materials were synthesized by wet ball milling, spray drying, and carbothermal reduction method using glucose and polyethylene glycol (PEG) as composite carbon sources and dodecyl polyglucoside (C12APG) as a milling aid. With the introduction of C12APG during the ball milling process, the prepared cathode materials have uniform particle size (100-200 nm in diameter) and regular primary particle morphology. In addition, PEG substitutes part of glucose as a carbon source, resulting in low carbon content and high graphitization of residual carbon after high-temperature calcination. The prepared LiFePO4/C cathode materials have a high powder compaction density (2.68 g cm-3) and excellent electrochemical performance (discharged capacities of 161.2 and 141.7 mAh g-1 at 0.2 C and 5 C, and cycle retention of 98.6% for 100 cycles at 1 C/1 C). This LiFePO4/C composite was assembled into 14500-type cylindrical batteries with a compaction density of 2.62 g cm-3 for the positive electrode. The volumetric energy densities of the positive electrode were 1135.18 Wh L-1 and 918.16 Wh L-1 at 0.2 C and 5 C, respectively.

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Section: Resultsmentioning

confidence: 99%

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

Li,

Gu,

Yang

et al. 2024

J. Electrochem. Soc.

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“…term) 4,5 Seconds-hours (short term, <1 h) 4 Hours-months 4, ** Minutes-days 4,5 Discharge time at power rating seconds-hours (up to 10 h) 4 * Response time refers to reactivity of fuel cells (FCs) after the startup period, which depends on the FC type, ** storage duration depends on the reservoir capacity, 1 according to reference [48], 2 according to reference [49], 3 according to reference [47], 4 according to reference [34], 5 according to reference [50], 6 according to reference [51]. [52], 2 according to reference [53], 3 according to reference [54], 4 according to reference [55], 5 according to reference [56], 6 according to reference [57], 7 according to reference [49], 8 according to reference [45], 9 according to reference [58], 10 according to reference [59], 11 according to reference [60], 12 according to reference [61], 13 according to reference [62], 14 according to references [62][63][64]. [65], 3 according to reference …”

Section: Performance Analysis Of Main Storage Solutions For Pevsmentioning

confidence: 99%

Are Personal Electric Vehicles Sustainable? A Hybrid E-Bike Case Study

Machedon-Pisu

Borza

2019

Sustainability

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As the title suggests, the sustainability of personal electric vehicles is in question. In terms of life span, range, comfort, and safety, electric vehicles, such as e-cars and e-buses, are much better than personal electric vehicles, such as e-bikes. However, electric vehicles present greater costs and increased energy consumption. Also, the impact on environment, health, and fitness is more negative than that of personal electric vehicles. Since transportation vehicles can benefit from hybrid electric storage solutions, we address the following question: Is it possible to reach a compromise between sustainability and technology constraints by implementing a low-cost hybrid personal electric vehicle with improved life span and range that is also green? Our methodology consists of life cycle assessment and performance analyses tackling the facets of the sustainability challenges (economy, society, and environment) and limitations of the electric storage solutions (dependent on technology and application) presented herein. The hybrid electric storage system of the proposed hybrid e-bike is made of batteries, supercapacitors, and corresponding power electronics, allowing the optimal control of power flows between the system's components and application's actuators.Our hybrid e-bike costs less than a normal e-bike (half or less), does not depend on battery operation for short periods of time (a few seconds), has better autonomy than most personal electric vehicles (more than 60 km), has a greater life span (a few years more than a normal e-bike), has better energy efficiency (more than 90%), and is much cleaner due to the reduced number of batteries replaced per life time (one instead of two or three).

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“…According to pioneering works in terms of different cation/anion doping effects in LFP or LiCoPO 4 , using In as the doping element is done to promote the electrical/ionic conductivities of cathodes, while introducing the F atoms aims to alleviate the adverse Mn-induced Jahn–Teller effects. 30–32 As evaluated, the electrical conductivity of LFMP cathodes is evidently increased by 38.2% after 1% In doping, helping to increase the reversible discharge capacity from the initial 135.3 to 144.9 mA h g −1 at 0.1C, whereas the moderate F doping enables the increase of the capacity retention rate from 74.8 to 93.9% after 500 times of deep cycling. Strikingly, our designed F/In co-doped cathodes show the highest discharge capacity of 158.5 mA h g −1 , and show prominent cycling/rate behaviors, without huge phase variation processes.…”

mentioning

confidence: 94%

Achieving long-lasting and high-capacity LiFe_0.5Mn_0.5PO₄ cathodes with a synergistic F/In dual doping strategy

Li,

Zhu,

et al. 2024

New J. Chem.

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Enhanced properties of LiFePO4/C cathode materials co-doped with V and F ions via high-temperature ball milling route

Cited by 17 publications

References 36 publications

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

Are Personal Electric Vehicles Sustainable? A Hybrid E-Bike Case Study

Achieving long-lasting and high-capacity LiFe_0.5Mn_0.5PO₄ cathodes with a synergistic F/In dual doping strategy

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Enhanced properties of LiFePO4/C cathode materials co-doped with V and F ions via high-temperature ball milling route

Cited by 17 publications

References 36 publications

High Volumetric Energy Density LiFePO4 /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

High Volumetric Energy Density LiFePO4 /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

Are Personal Electric Vehicles Sustainable? A Hybrid E-Bike Case Study

Achieving long-lasting and high-capacity LiFe0.5Mn0.5PO4 cathodes with a synergistic F/In dual doping strategy

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Product

Resources

About

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

High Volumetric Energy Density LiFePO₄ /C Cathode Materials Synthesized by Dodecyl Polyglucoside-Assisted Glucose-Polyethylene Glycol Composite Carbon Source

Achieving long-lasting and high-capacity LiFe_0.5Mn_0.5PO₄ cathodes with a synergistic F/In dual doping strategy