Low-valence bicomponent (FeO)<sub>x</sub>(MnO)<sub>1−x</sub> nanocrystals embedded in amorphous carbon as high-performance anode materials for lithium storage

Diao, Guiqiang; Balogun, Muhammad‐Sadeeq; Tong, Si-Yao; Guo, Xianzi; Huang, Xue; Mao, Yanchao; Tong, Yexiang

doi:10.1039/c8ta05015e

Cited by 24 publications

(8 citation statements)

References 88 publications

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“…Obviously, the theoretical calculations demonstrated that the charge redistribution on Ti, O, C, and S occurs at the interface between the LTO and rGO as well as around the oxygen vacancies, which induces an interfacial electric‐field effect. Both Li‐ion diffusion kinetics and electron transport can be accelerated by a built‐in charge‐transfer driving force in the electrode, affording superior rate capability of the CT‐rGO@LTO electrode . The computational results agree well with the XPS and Raman analyses.…”

Section: Resultssupporting

confidence: 59%

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Meng

et al. 2019

Small Methods

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Rational design of nanostructured electrode materials is highly desired for developing high‐performance lithium‐ion batteries (LIBs). Encapsulating electrode materials in reduced graphene oxide (rGO) shows great potential for manipulation of physicochemical properties at the atomic level, promoting remarkable electrochemical properties. Here, a controllable strategy is proposed to synthesize a “pomegranate‐like” 3D rGO encapsulated lithium titanate composite (CT‐rGO@LTO). The experimental results demonstrate the enriched oxygen vacancies in LTO and the electronic interactions at the interface between LTO and rGO. Density functional theory (DFT) calculations confirm the charge redistribution in the CT‐rGO@LTO composite, establishing a strong electric field with oxygen vacancies. Furthermore, the extra active sites in rGO for Li‐ion storage are investigated via in situ Raman tests. Benefiting from the oxygen vacancies and the electric‐field effect, the CT‐rGO@LTO electrode delivers excellent cycling stability with a capacity retention of 87.1% after 1500 cycles at 5 C. Moreover, the CT‐rGO@LTO electrode is adopted to assemble a full cell with a LiCoO2 cathode, which also displays superior rate capability with capacities of 139.4 and 109.7 mA h g−1 at 0.5 and 10 C, respectively. This work provides profound insights of fabricating high‐performance electrode materials for advanced energy storage.

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Section: Resultssupporting

confidence: 59%

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Meng

et al. 2019

Small Methods

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“…A lot of important work on exible-based energy storage devices has been reported. [1][2][3][4] As the exible or wearable electronics are usually closely attached to human body, one would expect the exible batteries to have higher safety and environmental standards than other batteries. In this regard, aqueous electrolyte based zinc ion batteries (ZIBs) have drawn a lot of interest not only because they are highly reliable and environmentally friendly, but also because of the abundance of the raw materials, such as Zn sources.…”

Section: Introductionmentioning

confidence: 99%

Flexible quasi-solid-state zinc ion batteries enabled by highly conductive carrageenan bio-polymer electrolyte

et al. 2019

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“…In order to improve energy density of LIBs, many anode materials, especially metal oxides (such as SnO 2 , Sb 2 O 3 , Fe 2 O 3 , TiO 2 , and Bi 2 O 3 ) with large reversible Li + storage capacities, have been studied. [6][7][8][9][10] By virtue of its high specific capacity (theoretically 1109 mAh g À 1 ), Sb 2 O 3 has been investigated as a promising anode for LIBs based on conversion and alloying reactions. [11,12] However, the rapid capacity fading and poor reversibility of Sb 2 O 3 are observed initially because of large volume changes upon cycling.…”

Section: Introductionmentioning

confidence: 99%

Mn₂Sb₂O₇/Reduced Graphene Oxide Composites with High Capacity and Excellent Cyclic Stability as Anode Materials for Lithium‐Ion Batteries

Jiao

Zeng

et al. 2019

ChemElectroChem

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For the advancement of lithium-ion batteries (LIBs), metal oxides with high theoretical specific capacities have been explored as anodes. Herein, we report a new metal oxide, Mn 2 Sb 2 O 7 -anchored reduced graphene oxide (Mn 2 Sb 2 O 7 /RGO), as an advanced anode for LIBs. The Mn 2 Sb 2 O 7 /RGO anode exhibits a higher capacity and better capacity retention compared to Mn 2 Sb 2 O 7 , because the close contact between Mn 2 Sb 2 O 7 and RGO facilitates charge transfer during cycling.The discharge capacity of Mn 2 Sb 2 O 7 /RGO reaches 706.72 mAh g À 1 at 200 mA g À 1 after 200 cycles. Even at 1000 mA g À 1 , the capacity loss per cycle of Mn 2 Sb 2 O 7 /RGO is only 0.0344 % for 600 cycles, indicating an excellent high-rate cyclic stability compared to other Sb-based oxides. These results forecast that Mn 2 Sb 2 O 7 /RGO is a potential anode for LIBs, providing a new insight into the selection of high-performance anodes.

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Low-valence bicomponent (FeO)_x(MnO)_1−x nanocrystals embedded in amorphous carbon as high-performance anode materials for lithium storage

Abstract: Nearly uniform monodisperse bicomponent iron manganese oxide, (FeO)x(MnO)1−x nanocrystals encapsulated in amorphous carbon was used as a high-performance anode material for lithium ion batteries.

Cited by 24 publications

References 88 publications

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Flexible quasi-solid-state zinc ion batteries enabled by highly conductive carrageenan bio-polymer electrolyte

Mn₂Sb₂O₇/Reduced Graphene Oxide Composites with High Capacity and Excellent Cyclic Stability as Anode Materials for Lithium‐Ion Batteries

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Low-valence bicomponent (FeO)x(MnO)1−x nanocrystals embedded in amorphous carbon as high-performance anode materials for lithium storage

Abstract: Nearly uniform monodisperse bicomponent iron manganese oxide, (FeO)x(MnO)1−x nanocrystals encapsulated in amorphous carbon was used as a high-performance anode material for lithium ion batteries.

Cited by 24 publications

References 88 publications

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Engineering of Oxygen Vacancy and Electric‐Field Effect by Encapsulating Lithium Titanate in Reduced Graphene Oxide for Superior Lithium Ion Storage

Flexible quasi-solid-state zinc ion batteries enabled by highly conductive carrageenan bio-polymer electrolyte

Mn2Sb2O7/Reduced Graphene Oxide Composites with High Capacity and Excellent Cyclic Stability as Anode Materials for Lithium‐Ion Batteries

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Low-valence bicomponent (FeO)_x(MnO)_1−x nanocrystals embedded in amorphous carbon as high-performance anode materials for lithium storage

Mn₂Sb₂O₇/Reduced Graphene Oxide Composites with High Capacity and Excellent Cyclic Stability as Anode Materials for Lithium‐Ion Batteries