Hierarchical Hollow Spheres of Fe<sub>2</sub>O<sub>3</sub>@Polyaniline for Lithium Ion Battery Anodes

Jeong, Jae‐Min; Choi, Bong Gill; Lee, Soon Chang; Lee, Kyoung G.; Chang, Sung‐Jin; Han, Young‐Kyu; Lee, Young Boo; Lee, Hyun Uk; Kwon, Soonjo; Lee, Gaehang; Lee, Chang‐Soo; Huh, Yun Suk

doi:10.1002/adma.201302710

Cited by 316 publications

(95 citation statements)

References 36 publications

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“…The improved electrochemical performance of the MoS 2 /PANI assemblies was ultimately attributed to nano-confinement of the MoS 2 primary units which promote kinetics because of the shortened diffusion paths, while the primary architecture at the micrometer scale effectively avoids aggregation of the active nanomaterials and facilitates the transport of electrons and ions. Similar results have been reported for Fe 2 O 3 except that the adopted morphology was spherical instead of wire based [95].…”

Section: Hierarchical Nanoparticle Assembliessupporting

confidence: 90%

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Uchaker

Cao

2015

Rechargeable Batteries

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Lithium-ion batteries are a well-established technology that has seen steady gains in performance based on materials chemistry as well as microstructure design and assembly over the past several decades. There are many material selections available when designing and assembling the device such as electro-active species, additives, and particle size/morphology to name a few. Many of the research proclamations focusing on the advantages of nanosized electrodes have yet to find commercial application, and considerable improvements in energy density and stability are still necessary in order to achieve energy storage parity. Therefore, the design and use of kinetically stabilized nanostructures should be considered. Over the past several years, significant studies have been conducted examining the synthesis and performance of heterogeneous structures. While heterogeneous structures typically refer to the combination of two or more materials, in this case it refers to architectures displaying more than one size scale (i.e., micro/nano). A great deal of recent efforts have focused on the formation and understanding of nanoparticle superstructures with a vast range of architectures. The design of microstructurally composed nanoparticle assemblies would, for instance, possess the

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Section: Hierarchical Nanoparticle Assembliessupporting

confidence: 90%

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Uchaker

Cao

2015

Rechargeable Batteries

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“…The second is to select the appropriate binders such as the bio-derived watersoluble polymers [16][17][18] (PAA, CMC, Alginate), which can be attributed to the effect of the hydrogen bonding between the carboxylic group of these polymers and Si surface. Besides, another effective strategy is to create silicon-based materials by dispersing the silicon particles in a conductive material matrix such as carbon [19][20][21][22][23] and conductive polymer [24,25], which can not only accommodate large stress and strain but also enhance the electric conductivity of the electrode and form a stable SEI layer. Polyaniline is a kind of potential electrical conductive polymer due to its easy synthesis, high conductivity, and environmental stability.…”

Section: Introductionmentioning

confidence: 99%

Nano-silicon/polyaniline composites with an enhanced reversible capacity as anode materials for lithium ion batteries

Feng

Tian

Xie

et al. 2015

J Solid State Electrochem

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Silicon nanoparticles are coated with the conductive polyaniline (PANI) using in situ polymerization method as anode materials to improve the electrochemical performance for lithium ion batteries. At first, the physicochemical and electrochemical properties of the doped polyaniline in the lithium ion electrolyte are investigated. After that, the effect of different contents of PANI for preparing Si/PANI composites on the composition and structure and thus the electrochemical performance are investigated. The structure and morphology of asprepared materials are characterized systematically by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). It is demonstrated that the silicon/polyaniline composite presents the core/shell structure. The Si/PANI composite with 12.3 wt% PANI exhibits the optimum electrochemical performance. The electrode still maintains better reversible capacity of 766.6 mAh g −1 , and the capacity retention of 72 % is retained after 50 cycles at current density of 2 A g −1 . The good electrochemical properties can be attributed to the PANI-coating layer, which can improve the electrical conductivity of the Si-based anode materials for lithium ion batteries and accommodate the volume change of silicon during the charge-discharge processes.

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“…The unique nanostructures, such as nanoparticles, 18,19 nanotubes, 12,20 and nanoflakes, 21,22 provide a short transport path for ion, a high active contact area and an effective buffer during chargedischarge process. 23 Another strategy is to combine these nanostructures with conductive materials including carbon-based materials 17,24 and conducting polymers 16,[25][26][27] . However, carbon coatings, which are realized usually by thermal decomposition of carbon precursors, usually cause environmental problems because of the formation of volatile organic compounds, CO and CO 2 , and sometimes lead to the inferior reconstruction of materials.…”

Section: Introductionmentioning

confidence: 99%

α-Fe₂O₃@PANI Core–Shell Nanowire Arrays as Negative Electrodes for Asymmetric Supercapacitors

Chen

Zhou

et al. 2015

ACS Appl. Mater. Interfaces

374

136

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Highly ordered three-dimensional α-Fe2O3@PANI core-shell nanowire arrays with enhanced specific areal capacity and rate performance are fabricated by a simple and cost-effective electrodeposition method. The α-Fe2O3@PANI core-shell nanowire arrays provide a large reaction surface area, fast ion and electron transfer, and good structure stability, which all are beneficial for improving the electrochemical performance. Here, high-performance asymmetric supercapacitors (ASCs) are designed using α-Fe2O3@PANI core-shell nanowire arrays as anode and PANI nanorods grown on carbon cloth as cathode, and they display a high volumetric capacitance of 2.02 mF/cm3 based on the volume of device, a high energy density of 0.35 mWh/cm3 at a power density of 120.51 mW/cm3, and very good cycling stability with capacitance retention of 95.77% after 10,000 cycles. These findings will promote the application of α-Fe2O3@PANI core-shell nanowire arrays as advanced negative electrodes for ASCs.

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Hierarchical Hollow Spheres of Fe₂O₃@Polyaniline for Lithium Ion Battery Anodes

Cited by 316 publications

References 36 publications

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Nano-silicon/polyaniline composites with an enhanced reversible capacity as anode materials for lithium ion batteries

α-Fe₂O₃@PANI Core–Shell Nanowire Arrays as Negative Electrodes for Asymmetric Supercapacitors

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Hierarchical Hollow Spheres of Fe2O3@Polyaniline for Lithium Ion Battery Anodes

Cited by 316 publications

References 36 publications

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Microstructurally Composed Nanoparticle Assemblies as Electroactive Materials for Lithium-Ion Battery Electrodes

Nano-silicon/polyaniline composites with an enhanced reversible capacity as anode materials for lithium ion batteries

α-Fe2O3@PANI Core–Shell Nanowire Arrays as Negative Electrodes for Asymmetric Supercapacitors

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Hierarchical Hollow Spheres of Fe₂O₃@Polyaniline for Lithium Ion Battery Anodes

α-Fe₂O₃@PANI Core–Shell Nanowire Arrays as Negative Electrodes for Asymmetric Supercapacitors