Synthesis of Li3V2(PO4)3/reduced graphene oxide cathode material with high-rate capability

Zhu, Jin; Yang, Rongsheng; Wu, Keliang

doi:10.1007/s11581-012-0795-8

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…On the basis of these advantages, incorporation of graphene with electrode materials including anodes and cathodes has been successfully developed and was reported to have superior electrochemical performance for LIBs [258][259][260][261]. Of course, graphene can also serve as the conducting support material to enhance the capacity delivery and cycle performance of LVP batteries [141,[262][263][264][265][266][267][268][269].…”

Section: Graphene Modificationmentioning

confidence: 99%

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Rui¹,

Yan²,

Skyllas‐Kazacos³

et al. 2014

Journal of Power Sources

294

202

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Section: Graphene Modificationmentioning

confidence: 99%

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Rui¹,

Yan²,

Skyllas‐Kazacos³

et al. 2014

Journal of Power Sources

294

202

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“…Its superior electric conductivity, chemical stability and high flexibility make it of great interest as electrode material and additive in energy storage and conversion systems. [13][14][15][16][17][18][19] For example, the addition of graphene to lithium metal phosphates, which display low electrical conductivity (near 10 −9 -10 −7 S cm −1 ), boosts electronic conductivity, enhances microstructure via the formation of a three-dimensional network that shortens the lithium ion diffusion distance, and improves morphology by hindering grain growth.Directly adding graphene during conventional or non-conventional syntheses is often pursued. Graphene oxide (GO) is usually added to the precursors of the cathode materials so that the synthesis of the latter and GO reduction occur simultaneously during pyrolysis under reducing atmosphere.…”

mentioning

confidence: 99%

Reduced Graphene Oxide in Cathode Formulations Based on LiNi_0.5Mn_1.5O₄

Arbizzani

Col

Giorgio

et al. 2015

J. Electrochem. Soc.

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We investigated the electrochemical properties of composite cathodes obtained by mixing LiNi 0.5 Mn 1.5 O 4 (LNMO), reduced graphene oxide (RGO) and carbon black (C65). Electrochemical electrode characterization was carried out in ethylene carbonate: dimethyl carbonate and 1 M LiPF 6 by galvanostatic charge/discharge cycles up to 4.8 V vs. Li + /Li and impedance spectroscopy. We demonstrate that RGO improves the electrode/electrolyte interface stability at high potentials and, consequently, the cycling stability of LNMO cathodes in the presence of C65 with 92% capacity retention after 100 cycles at 1 C. The reciprocal effect of RGO and C65 is also beneficial for rate capability, which retained a specific capacity of 75 mAh g −1 at 10 C. The electric contact between particles is promoted by C65 s conductive percolating network; RGO enhances the electrical conductivity of the composite electrode and hinders undesirable reactions between LNMO and the electrolyte. Despite RGO's lower electronic resistivity with respect to C65, the addition of RGO alone to LNMO is not sufficient to assure good performance. The mixing procedure without C65 promotes the agglomeration of graphene nanosheets rather than their distribution among LNMO particles and aggregates, limiting the electron and Li + transport in the cathode material. The appealing properties of graphene have attracted great attention in several research fields. Its superior electric conductivity, chemical stability and high flexibility make it of great interest as electrode material and additive in energy storage and conversion systems. [13][14][15][16][17][18][19] For example, the addition of graphene to lithium metal phosphates, which display low electrical conductivity (near 10 −9 -10 −7 S cm −1 ), boosts electronic conductivity, enhances microstructure via the formation of a three-dimensional network that shortens the lithium ion diffusion distance, and improves morphology by hindering grain growth.Directly adding graphene during conventional or non-conventional syntheses is often pursued. Graphene oxide (GO) is usually added to the precursors of the cathode materials so that the synthesis of the latter and GO reduction occur simultaneously during pyrolysis under reducing atmosphere.1 LiN 0.5 Mn 1.5 O 4 (LNMO)/graphene composites have recently been developed [20][21][22] by suspending mildly oxidized graphene and LNMO in ethanol to obtain graphene-wrapped LNMO. Graphene acts as a protective layer that minimizes the Mn 2+ dissolution in electrolyte and limits the unwanted parasitic electrode reactions, which affect both capacity and coulombic efficiency.Large-size battery production needs bulk syntheses of cathode materials and viable, inexpensive methods of preparing the composite electrode with graphene. Simple mixing of cathode composite components that include graphene might be a preferable, albeit nonoptimal, procedure. We thus investigated several mixing procedures for LNMO-based composites with reduced graphene oxide (RGO) and carbon black. The results o...

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“…Therefore, graphene could be an exceptionably suitable candidate for the using in lithium ion battery cathodes as an electron-conducting additive. Currently, incorporation of graphene with electrode materials has been successfully developed and is reported to have superior electrochemical performance in LVP batteries [133][134][135][136].…”

Section: Graphene Modificationmentioning

confidence: 99%

Lithium vanadium phosphate as cathode material for lithium ion batteries

Wang

Liu

et al. 2015

Ionics

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Lithium vanadium phosphate (Li 3 V 2 (PO 4 ) 3 ) has been extensively studied because of its application as a cathode material in rechargeable lithium ion batteries due to its attractive electrochemical properties, including high specific energy, high working voltage, good cycle stability, and low price. In this review, the preparation of technology, structure, Li + insertion/extraction mechanism, and electrochemical properties of Li 3 V 2 (PO 4 ) 3 are introduced, and with particular focus on the relationship of these topics each other. The synthetic techniques of Li 3 V 2 (PO 4 ) 3 , such as high-temperature solid-state method, sol-gel method, hydrothermal method, etc. And progress of techniques in modification, such as coating and elemental doping, is reviewed. Finally, the directions for further development and prospective applications for the material are proposed.

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Synthesis of Li3V2(PO4)3/reduced graphene oxide cathode material with high-rate capability

Cited by 20 publications

References 22 publications

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Reduced Graphene Oxide in Cathode Formulations Based on LiNi_0.5Mn_1.5O₄

Lithium vanadium phosphate as cathode material for lithium ion batteries

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Synthesis of Li3V2(PO4)3/reduced graphene oxide cathode material with high-rate capability

Cited by 20 publications

References 22 publications

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Li3V2(PO4)3 cathode materials for lithium-ion batteries: A review

Reduced Graphene Oxide in Cathode Formulations Based on LiNi0.5Mn1.5O4

Lithium vanadium phosphate as cathode material for lithium ion batteries

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Reduced Graphene Oxide in Cathode Formulations Based on LiNi_0.5Mn_1.5O₄