Preparation and electrochemical performance of LiFePO4/C microspheres by a facile and novel co-precipitation

Bai, Ningbo; Chen, Han; Zhou, Wei; Xiang, Kaixiong; Zhang, Youliang; Li, Chunlong; Lu, Huayu

doi:10.1016/j.electacta.2015.03.163

Cited by 24 publications

(6 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CV plots and the cycling results verify the better electrochemical property of the sol–gel-derived carbon-encapsulated LFP nanochains, which is in line with different literature reports. 48,49,53,54…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical Analysis of the Carbon-Encapsulated Lithium Iron Phosphate Nanochains and Their High-Temperature Conductivity Profiles

et al. 2018

View full text Add to dashboard Cite

Carbon-encapsulated LiFePO 4 (LFP) nanochains were prepared as a cathode material for lithium batteries by sol–gel method using citric acid as the carbon source. The prepared LFP/C material is characterized by structural, morphological, and electrochemical characterization. LFP/C shows an orthorhombic olivine structure with “ Pnma ” space group having an average particle size of 50 nm. The uniform distribution of LFP particles coated by the carbon matrix as a nanochain array has been analyzed by scanning electron microscopy and transmission electron microscopy analysis of the sample. The electrochemical performance of the LFP/C nanochain has been analyzed using galvanostatic cycling, cyclic voltammetry, and impedance analysis of the assembled batteries. The sol–gel-derived LFP/C nanochain exhibits better capacity and electrochemical reversibility in line with the literature results. The high-temperature conductivity profile of the sample has been recorded from room temperature to 473 K using impedance analysis of the sample. The transport dynamics have been analyzed using the dielectric and modulus spectra of the sample. A maximum conductivity up to 6.74 × 10 –4 S cm –1 has been obtained for the samples at higher temperature (448 K). The nucleation and growth at higher temperature act as factors to facilitate the intermediate phase existence in the LiFePO 4 sample in which the phase change that occurs above 400 K gives irreversible electrochemical changes in the LFP/C samples.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The CV plots and the cycling results verify the better electrochemical property of the sol−gel-derived carbonencapsulated LFP nanochains, which is in line with different literature reports. 48,49,53,54 Impedance Analysis. Figure 9 shows the impedance plot of the assembled cell before and after cycling.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Electrochemical Analysis of the Carbon-Encapsulated Lithium Iron Phosphate Nanochains and Their High-Temperature Conductivity Profiles

et al. 2018

View full text Add to dashboard Cite

show abstract

“…TG-DSC measurement data is used to estimate the graphene and carbon content in the LiFePO 4 /graphene and LiFePO 4 /carbon composites, as shown in Figure 2. The pure LiFePO 4 can be completely oxidized to Li 3 Fe 2 (PO 4 ) 3 and Fe 2 O 3 under air flow, and the total weight gain is about 5.07% in theory (Belharouak et al, 2005;Bai et al, 2015). For LiFePO 4 /graphene and LiFePO 4 /carbon composites, in the temperature range of 400-600 • C, the graphene and carbon are oxidized to CO 2 gas, so the amounts of graphene and carbon in the LiFePO 4 /graphene and LiFePO 4 /carbon composites are about 1.40 and 10.70%, respectively.…”

Section: Tg-dsc Analysismentioning

confidence: 99%

One-Step Microwave Synthesis of Micro/Nanoscale LiFePO4/Graphene Cathode With High Performance for Lithium-Ion Batteries

Liu

Yan

et al. 2020

Front. Chem.

View full text Add to dashboard Cite

In this study, micro/nanoscale LiFePO 4 /graphene composites are synthesized successfully using a one-step microwave heating method. One-step microwave heating can simplify the reduction step of graphene oxide and provide a convenient, economical, and effective method of preparing graphene composites. The structural analysis shows that LiFePO 4 /graphene has high phase purity and crystallinity. The morphological analysis shows that LiFePO 4 /graphene microspheres and micron blocks are composed of densely aggregated nanoparticles; the nanoparticle size can shorten the diffusion path of lithium ions and thus increase the lithium-ion diffusion rate. Additionally, the graphene sheets can provide a rapid transport path for electrons, thus increasing the electronic conductivity of the material. Furthermore, the nanoparticles being packed into the micron graphene sheets can ensure stability in the electrolyte during charging and discharging. Raman analysis reveals that the graphene has a high degree of graphitization. Electrochemical analysis shows that the LiFePO 4 /graphene has an excellent capacity, high rate performance, and cycle stability. The discharge capacities are 166.3, 156.1, 143.0, 132.4, and 120.9 mAh g −1 at rates of 0.1, 1, 3, 5, and 10 C, respectively. The superior electrochemical performance can be ascribed to the synergy of the shorter lithium-ion diffusion path achieved by LiFePO 4 nanoparticles and the conductive networks of graphene.

show abstract

“…Different types of synthesis techniques were used to produce the LiFePO4 particles, including microwave (Yu et al 2014), solid-state reaction (Rosaiah et al 2017), template method (Liang et al 2012), sol-gel (Ziolkowska et al 2016), co-precipitation (Bai et al 2015), hydrothermal (Vediappan et al 2014) and mechanical activation (Wang et al 2009), among others.…”

Section: Lithium Ferrous (Ii) Phosphate (Lifepo4)mentioning

confidence: 99%

Advances in Cathode Nanomaterials for Lithium-Ion Batteries

Costa

Lanceros‐Méndez

2019

Nanostructured Materials for Next-Generation Energy Storage and Conversion

View full text Add to dashboard Cite

Energy resources, consumption, and management are among the most important issues of this century. Our dependence on fossil fuels should be changed by eco-friendlier renewable energies. Further, the generated electrical energy should be stored for improving mobile applications, being batteries the most used system for this purpose. Lithium-ion batteries are the most promising battery type and are composed of three main elements: cathode, anode and separator/electrolyte. The active material of the cathode is primarily responsible for the battery capacity, and for that reason, different cathode materials have been developed and explored for lithium-ion batteries. In the present work, the most relevant cathode materials are presented, their main properties and characteristics described and their advantage and disadvantage analyzed, allowing understand to which extend those material are suitable for specific applications in this field.

show abstract

Preparation and electrochemical performance of LiFePO4/C microspheres by a facile and novel co-precipitation

Cited by 24 publications

References 42 publications

Electrochemical Analysis of the Carbon-Encapsulated Lithium Iron Phosphate Nanochains and Their High-Temperature Conductivity Profiles

Electrochemical Analysis of the Carbon-Encapsulated Lithium Iron Phosphate Nanochains and Their High-Temperature Conductivity Profiles

One-Step Microwave Synthesis of Micro/Nanoscale LiFePO4/Graphene Cathode With High Performance for Lithium-Ion Batteries

Advances in Cathode Nanomaterials for Lithium-Ion Batteries

Contact Info

Product

Resources

About