High Electrochemical Performance of LiFePO4 Cathode Material via In-Situ Microwave Exfoliated Graphene Oxide

Ye, Feng; Zhang, Li Li; Lai, Linfei; Zhu, Mingyuan; Guo, Yanchuan; Xia, Lili; Qi, Peirong; Wang, Gang; Dai, Bin

doi:10.1016/j.electacta.2014.11.014

Cited by 43 publications

(18 citation statements)

References 44 publications

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“…We know that the EIS is an important method to study the diffusion coefficient through the Warburg impedance in the low frequency. We can calculated it using the following equation [47,48]:…”

Section: Electrochemical Properties Of the Md-lifepo 4 /Cmentioning

confidence: 99%

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Fan

Luo

Chuang

et al. 2015

Electrochimica Acta

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Section: Electrochemical Properties Of the Md-lifepo 4 /Cmentioning

confidence: 99%

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Fan

Luo

Chuang

et al. 2015

Electrochimica Acta

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“…GO-coated cathode materials were used to improve electrochemical performance based on their superior electronic conductivity and large surface area [20,21]. In this study, a double-coating layer structure including an inner SnO 2 nanosize and an outer GO layer was introduced to coat the NCM cathode material.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Electrochemical Performance of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Material by Double-Layer Coating with Graphene Oxide and SnO₂ for Lithium-Ion Batteries

Cui

Zhan

et al. 2019

Journal of Nanomaterials

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The graphene oxide-coated SnO2-Li1/3Co1/3Mn1/3O2 (GO-SnO2-NCM) cathode material was successfully synthesized via a facile wet chemical method. The pristine NCM and GO-SnO2-NCM were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that the double-coating layer did not destroy the NCM crystal structure, with multiple nano-SnO2 particles and GO uniformly covering the NCM surface. Electrochemical tests indicated that GO-SnO2-NCM exhibited excellent cycling performance, with 90.7% capacity retention at 1 C after 100 cycles, which was higher than 74.3% for the pristine NCM at the same cycle. The rate capability showed that the double-coating layer enhanced surface electronic–ionic transport. Electrochemical impedance spectroscopy results confirmed that the GO-SnO2-coating layer effectively suppressed the increased electrode polarization and charge transfer resistance during cycling.

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“…After reduction, the peaks of the oxygen functional groups were reduced significantly, as shown in Figure 1(b). Figure 2 shows the FTIR spectra of LiFePO 4 [11]. The peak at wavenumber 857 cm -1 corresponds to vibration of Li 2 SiO 3 [12].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of LiFePO₄/Li₂SiO₃/reduced Graphene Oxide (rGO) Composite via Hydrothermal Method

Arifin

Iskandar

Aimon

et al. 2016

J. Phys.: Conf. Ser.

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Abstract. LiFePO 4 is a type of cathode active material used for lithium ion batteries. It has a high electrochemical performance. However, it suffers from certain disadvantages such as a very low intrinsic electronic conductivity and low ionic diffusion. This study was conducted to increase the conductivity of LiFePO 4 . We have investigated the addition of Li 2 SiO 3 and reduced graphene oxide (rGO) to LiFePO 4 . The objective of this research was to synthesize LiFePO 4 /Li 2 SiO 3 /rGO via hydrothermal method. Fourier transform infrared spectroscopy (FTIR) measurement showed that the peaks corresponded to the vibration of LiFePO 4 /Li 2 SiO 3 . Further, X-ray diffraction (XRD) measurement confirmed a single phase of LiFePO 4 . Finally, scanning electron microscopy (SEM) images showed that rGO was distributed on the LiFePO 4 /Li 2 SiO 3 structure. IntroductionMany researchers are interested in the optimization of LiFePO 4 as cathode active material for lithium ion batteries [1]. This material has several advantages, such as low toxicity, cheap, long cycle ability, and high safety [2]. It also has high electrochemical performance, such as a stable operational voltage at 3.45 V and high theoretic capacity at 170 mAh.g -1 . However, it suffers from certain disadvantages such as very low intrinsic electronic conductivity and low lithium ionic diffusion [3]. To counter these problems, several researchers have attempted to improve the electrical conductivity and ionic diffusion of LiFePO 4 with controlled morphology [4] or composites of LiFePO 4 [5].Reduced graphene oxide (rGO) and Li 2 SiO 3 are materials with high electrical [6] and ionic conductivity [7], respectively. With its high electrical conductivity, rGO can increase electrical conductivity of LiFePO 4 . Meanwhile, with its high ionic conductivity, Li 2 SiO 3 can improve ionic diffusion of LiFePO 4 . Therefore, the objective of this research was to composite Li 2 SiO 3 and rGO into LiFePO 4 using a hydrothermal process.

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High Electrochemical Performance of LiFePO4 Cathode Material via In-Situ Microwave Exfoliated Graphene Oxide

Cited by 43 publications

References 44 publications

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Enhancement of the Electrochemical Performance of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Material by Double-Layer Coating with Graphene Oxide and SnO₂ for Lithium-Ion Batteries

Synthesis of LiFePO₄/Li₂SiO₃/reduced Graphene Oxide (rGO) Composite via Hydrothermal Method

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High Electrochemical Performance of LiFePO4 Cathode Material via In-Situ Microwave Exfoliated Graphene Oxide

Cited by 43 publications

References 44 publications

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

Enhancement of the Electrochemical Performance of LiNi1/3Co1/3Mn1/3O2 Cathode Material by Double-Layer Coating with Graphene Oxide and SnO2 for Lithium-Ion Batteries

Synthesis of LiFePO4/Li2SiO3/reduced Graphene Oxide (rGO) Composite via Hydrothermal Method

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Product

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Enhancement of the Electrochemical Performance of LiNi_1/3Co_1/3Mn_1/3O₂ Cathode Material by Double-Layer Coating with Graphene Oxide and SnO₂ for Lithium-Ion Batteries

Synthesis of LiFePO₄/Li₂SiO₃/reduced Graphene Oxide (rGO) Composite via Hydrothermal Method