CNTs@γ-Fe2O3@C composite electrode for high capacity lithium ion storage

Jiang, Xiaotong; Guo, Wenlei; Lu, Pengyi; Song, Dan; Guo, Anran; Liu, Jiachen; Liang, Ji; Hou, Feng

doi:10.1016/j.ijhydene.2018.01.102

Cited by 20 publications

(5 citation statements)

References 29 publications

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“…Raman spectra were attained with an Ar-ion laser of 532 nm using the in Via Reflex Raman imaging microscope system. The carbon content of pomegranate-shaped Fe 2 O 3 /C nano-composites was estimated by the thermogravimetric analysis (TGA; TA Instruments, SDTQ600) method [22, 24], which showed weight change after heating up. The weight ratio of carbon was calculated as 45.2 wt%.…”

Section: Methodsmentioning

confidence: 99%

“…Then, graphene-Fe 2 O 3 composites were obtained by freeze drying process. Some Fe 2 O 3 –C core-shell composites such as carbon nanotube@Fe 2 O 3 @C, Fe 2 O 3 @C hollow spheres, and Fe 2 O 3 @graphite nanoparticles were fabricated by two-step synthesis methods containing hydrothermal reactions and high-temperature calcination processes [22–24]. These composites have shown excellent Li storage properties.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

et al. 2018

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Due to the severe volume expansion and poor cycle stability, transition metal oxide anode is still not meeting the commercial utilization. We herein demonstrate the synthetic method of core-shell pomegranate-shaped Fe2O3/C nano-composite via one-step hydrothermal process for the first time. The electrochemical performances were measured as anode material for Li-ion batteries. It exhibits excellent cycling performance, which sustains 705 mAh g−1 reversible capacities after 100 cycles at 100 mA g−1. The anodes also showed good rate stability with discharge capacities of 480 mAh g−1 when cycling at a rate of 2000 mA g−1. The excellent Li storage properties can be attributed to the unique core-shell pomegranate structure, which can not only ensure good electrical conductivity for active Fe2O3, but also accommodate huge volume change during cycles as well as facilitate the fast diffusion of Li ion.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

et al. 2018

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“…The Ni rich LiNi x Co y Mn (1– x – y ) O 2 (0 < x , y < 1) LIB cathode materials deliver a capacity of approximately 200 mA h g –1 , which is dozens higher than that of the conventional LiCoO 2 material, − making it the most powerful cathode material reported to date; however, there are safety matters associated with this cathode that have yet to be addressed. Conversely, choices of anode materials are much less restricted. , For example, a successful replacement of commercial graphite anodes (372 mA h g –1 ) with transition metal oxides (TMOs, over 800 mA h g –1 ) could lead to capacity improvements that would be in the hundreds …”

Section: Introductionmentioning

confidence: 99%

“…Conversely, choices of anode materials are much less restricted. 7,8 For example, a successful replacement of commercial graphite anodes (372 mA h g −1 ) with transition metal oxides (TMOs, over 800 mA h g −1 ) could lead to capacity improvements that would be in the hundreds. 9 TMOs were first proposed as anodes for LIBs by Poizot et al in the year 2000.…”

Section: Introductionmentioning

confidence: 99%

Stable Conversion Mn₃O₄ Li-Ion Battery Anode Material with Integrated Hierarchical and Core–Shell Structure

Wang

et al. 2019

ACS Appl. Energy Mater.

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Anodes composed of Mn3O4 deliver a much higher specific capacity in Li-ion batteries (LIBs) than that of commercial graphite but suffer from poor cycling stability, a poor rate characteristic, and a high overpotential stemming from volumetric changes during cycling, low electroconductibility, and insufficient ion diffusivity. To make Mn3O4 more applicable, we developed a convenient one-pot synthesis route to fabricate porous hierarchical spherical Mn3O4 with in situ coated conductive carbon (C-Mn3O4). The C-Mn3O4 shows a large capacity and good cycling stability. When assembled into anodes, this material delivered a capacity of 703 mA h g–1 in a 1000 mA g–1 cycling test after 700 cycles with only a 3% capacity decay. Meanwhile, the system provided superior rate performance with capacities of 860, 823, 760, 674, and 570 mA h g–1 at 100, 200, 500, 1000, and 2000 mA g–1, respectively. On the basis of our systematic investigations, we attribute this high electrochemical performance to the carbon reinforced porous hierarchical sphere structure.

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“…Because of the burgeoning demand of traditionally exhaustible fossil fuels, lithium ion batteries (LIBs) have become one of the considerably promising power sources to handle the urgencies of energy dilemma and serious greenhouse effect because of their reversibility and absence of polluting gas emissions. − Compared to ubiquitous graphite anode for LIBs holding a low theoretical capacity (372 mAh g –1 ), constructing advanced anode alternatives with high energy density and long cycle lifespan, such as alloy-type materials concerning Si and conversion-type transition-metal compounds involving iron oxides, , are highly desirable to fulfill the ever-growing needs for portable electronics and electric vehicles. − …”

Section: Introductionmentioning

confidence: 99%

Hierarchically Porous N,S-Codoped Carbon-Embedded Dual Phase MnO/MnS Nanoparticles for Efficient Lithium Ion Storage

Wang

Huang

et al. 2018

Inorg. Chem.

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An intriguingly nanostructured composite comprising of MnO/MnS nanoparticles embedded in an N,S-codoped carbon frame (MnO/MnS@C) is designed here and employed as a promising Li-ion storage electrode material to address the challenge of inferior conductivity and large volume change toward manganese chalcogenide-based anode. Combining with the merits of coherent MnO/MnS, elaborately hierarchical-porous architecture and N,S-codoped carbon frame, this composite exhibits high lithium-ion storage capacity (591 mAh g at 0.1 A g) and remarkable cyclic performance (628 mAh g at 1 A g over 330 cycles). It is revealed via quantitative analysis that capacitive effect is also responsible for Li storage except ordinary diffusion-controlled mechanism, which consists of faradaic surface pseudocapacitance rooting from further oxidation of Mn and nonfaradaic interfacial double-layer capacitance stemming from the charge separation at the MnO/MnS phase boundary. As a dynamic equilibrium for diffusion-controlled lithium storage, such capacitive contribution leads to ever-increasing Li-ion storage. The delicate construction endows an improved ion/electron transport kinetics, increased electrode/electrolyte contact area and plentifully heterogeneous interface, accounting for the high capacity and long-cycle stability.

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CNTs@γ-Fe2O3@C composite electrode for high capacity lithium ion storage

Cited by 20 publications

References 29 publications

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Stable Conversion Mn₃O₄ Li-Ion Battery Anode Material with Integrated Hierarchical and Core–Shell Structure

Hierarchically Porous N,S-Codoped Carbon-Embedded Dual Phase MnO/MnS Nanoparticles for Efficient Lithium Ion Storage

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CNTs@γ-Fe2O3@C composite electrode for high capacity lithium ion storage

Cited by 20 publications

References 29 publications

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Stable Conversion Mn3O4 Li-Ion Battery Anode Material with Integrated Hierarchical and Core–Shell Structure

Hierarchically Porous N,S-Codoped Carbon-Embedded Dual Phase MnO/MnS Nanoparticles for Efficient Lithium Ion Storage

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Stable Conversion Mn₃O₄ Li-Ion Battery Anode Material with Integrated Hierarchical and Core–Shell Structure