Enhancement of electrochemical behavior of nanostructured LiFePO4/Carbon cathode material with excess Li

Bazzi, Khadije; Nazri, M.; Naik, V. M.; Garg, V. K.; Oliveira, A. C.; Vaishnava, P. P.; Nazri, G.A.; Naik, R.

doi:10.1016/j.jpowsour.2015.11.086

Cited by 55 publications

(19 citation statements)

References 41 publications

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“…7). Those parameters were close to Fe 4 P 6 O 21 ferric pyrophosphate characteristics (0.80 mm/s and 0.42 mm/s), but that compound formation is hardly probable [21].…”

Section: 0supporting

confidence: 56%

Plate-Like LiFePO4 Nanoparticles: Synthesis, Structure, Electrochemistry

2017

Nanosist. Nanomater. Nanotehnol.

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лью было исследование влияния относительного содержания этиленгликоля и температуры реакционной среды на фазовый состав полученных материалов, их кристаллическую и магнитную микроструктуры, состояние поверхности и электрические свойства. Óстановлено, что имеется корреляция между морфологией материалов и их электрохимическими свойствами. Óменьшение размера частиц и степени агломерации приводит к увеличению удельной ёмкости литиевых источников энергии с катодами на основе синтезированных материалов.

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Section: 0supporting

confidence: 56%

Plate-Like LiFePO4 Nanoparticles: Synthesis, Structure, Electrochemistry

2017

Nanosist. Nanomater. Nanotehnol.

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“…As the peak position and their relative intensities reflect the kinetics of the Li + ‐ion insertion/extraction process the CV measurements are conducted at various sweep rates to evaluate the kinetic properties of the Zn 3 V 2 O 8 /hGO electrode as shown in Figure 7C. Generally, as the scan rate increase, the curves retain analogous shapes but the pair of oxidation/reduction peaks undergo a slight shift to higher/lower potentials, respectively 56,57 . The same behaviour is observed when increasing the sweep rate from 0.1 to 2.0 mV s −1 where the shape of the peaks is retained with a slight shift in the peak potentials however much stronger peak density is observed for the Zn 3 V 2 O 8 /hGO electrode as compared to Zn 3 V 2 O 8 indicating its improved reaction kinetics that is further verified by electrochemical impedance spectroscopy (EIS) results.…”

Section: Resultsmentioning

confidence: 74%

Lithium‐ion battery anode with high capacity retention derived from zinc vanadate and holey graphene

Khan

Ali

Inayat

et al. 2022

Intl J of Energy Research

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Several phases of zinc vanadates having different morphologies have been investigated recently for lithium-ion batteries (LIBs), where they suffer from poor electronic conductivity and low mechanical stability resulting in short cycle life, low specific capacity and unsatisfactory rate performance. The issues are resolved here, by directly growing Zn 3 V 2 O 8 sheets on two dimensional (2D) holey graphene oxide (hGO) nanosheets making an open framework of Zn 3 V 2 O 8 that allows suitable spacing for Li + -ions for (de) intercalation and the holey graphene provides the necessary mechanical strength, permeability and electronic conductivity across the Zn 3 V 2 O 8 sheets. Consequently, the sheet on sheet morphology has resulted in an impressive rate capability of 851.2 mAh g À1 at 5000 mA g À1 with 67% retention after a 10-fold increase in the current rate, high specific capacity (1465.9 mAh g À1 at 200 mA g À1 ) and long-term stability (88% retention after 200 cycles). This is due to the crystalline structure of Zn 3 V 2 O 8 /hGO, with a large surface area that can provide more reaction sites and facilitate the fast Li + -ion transport as verified by the electrochemical impedance spectroscopy analysis. The ex situ X-ray photoelectron spectrometer reveals the involvement of multiple reaction mechanisms (conversion, (de) insertion and (de) alloying) showing Zn 2+ /Zn 0 and V 4+ /V 3+ /V 2+ redox couples during the electrochemical process.

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“…In this structure, there is one common edge between an adjacent PO 4 tetrahedron and FeO 6 octahedron,a nd two common www.chemsuschem.org edges between the LiO 6 octahedra. [28,43,44] The FeO 6 octahedron also has common edges with two LiO 6 octahedra. The PO 4 tetrahedron allows the strong PÀOc ovalentb ond, and the PÀO and OÀOd istances are almost fixed.…”

Section: Resultsmentioning

confidence: 99%

Electrode Materials with a Crater‐Type Morphology Prepared by Electrospraying for High‐Performance Lithium‐Ion Batteries

Kim

2019

ChemSusChem

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Rechargeable lithium‐ion batteries with good electrochemical properties require nanostructured electrode materials, which are usually prepared through complex synthesis processes. Herein, a new facile method is reported for the synthesis of high‐performance electrode materials with a crater‐like morphology through repulsion between positive charges. The produced electrode material does not possess a nanostructure. However, it is capable of rapidly transferring lithium ions and electrons owing to the large contact area with electrolyte and the high concentration sp2‐hybridized carbon coating. LiFePO4 and LiNi1/3Co1/3Mn1/3O2 electrodes prepared by this process achieved high discharge capacities of 165.7 and 199.9 mAh g−1 at 0.1 C, with excellent rate capability of 127.5 and 162.6 mAh g−1 at 10 C, respectively. Although the crater‐type materials might decrease the electrode tap density, they facilitate better electrochemical properties such as high capacity, high power, and fast charging. Furthermore, this new method can be applied trough a sol–gel process for the synthesis of electrode materials to improve their electrochemical characteristics.

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Enhancement of electrochemical behavior of nanostructured LiFePO4/Carbon cathode material with excess Li

Cited by 55 publications

References 41 publications

Plate-Like LiFePO4 Nanoparticles: Synthesis, Structure, Electrochemistry

Plate-Like LiFePO4 Nanoparticles: Synthesis, Structure, Electrochemistry

Lithium‐ion battery anode with high capacity retention derived from zinc vanadate and holey graphene

Electrode Materials with a Crater‐Type Morphology Prepared by Electrospraying for High‐Performance Lithium‐Ion Batteries

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