Tuning the annealing temperature to achieve heterostructured nanofibers for high performance lithium-ion batteries

Yu, Shijin; Tong, Jiahao; Wei, Ying; Chen, Tianrui; He, Xuannan; Sui, Huiqiang; Li, Cuiyun; Zhu, Hua; Fu, Qiuyun; Kong, Lingbing

doi:10.1039/d2nj05331d

Cited by 4 publications

(5 citation statements)

References 84 publications

(139 reference statements)

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“…It is interesting that the reduction peak near 1.69 V becomes more pronounced in the first cathode scan as the annealing temperature increases, which is in agreement with the MoO 2 content in XRD refinement. At the same time, the reduction peak of the CV curves shifts toward a lower potential as the annealing temperature increases, which may be due to the improved conductivity of the electrode by the heterostructure . In summary, the Li + storage mechanism in Fe 2 O 3 /MoO 2 /Fe 2 (MoO 4 ) 3 is a combination of partially irreversible embedding and transformation as well as partially reversible transformation.…”

Section: Resultsmentioning

confidence: 91%

“…At the same time, the reduction peak of the CV curves shifts toward a lower potential as the annealing temperature increases, which may be due to the improved conductivity of the electrode by the heterostructure. 44 In summary, the Li + storage mechanism in Fe 2 O 3 /MoO 2 / Fe 2 (MoO 4 ) 3 is a combination of partially irreversible embedding and transformation as well as partially reversible transformation. Therefore, the above redox process can be summarized using the following equations:…”

Section: Resultsmentioning

confidence: 94%

“…Therefore, the electrode material is prone to detachment from the current collector at high current density after long cycles, thereby hindering the increase of reversible capacity. 44 In addition to improving the cycling performance, the rate performance of the electrode is also measured at a current density of 1−10 A•g −1 (Figure 4e). Although the electrodes provide similar capacities at low current density, FMO-600 maintains higher capacity at higher current density.…”

Section: Resultsmentioning

confidence: 99%

“…It can be observed that the particle size of FMO-650 and FMO-700 electrodes significantly increases from the SEM images, which may cause the active material to detach from the surface of the collector and deactivate the active material. Therefore, the electrode material is prone to detachment from the current collector at high current density after long cycles, thereby hindering the increase of reversible capacity …”

Section: Resultsmentioning

confidence: 99%

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Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

Chen,

Wu,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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The synergistic regulation of the built-in electric field and interface effect is applied in this work to solve problems of poor rate performance and short cycle life caused by low reaction kinetics and lattice expansion. Constructing heterostructures is considered an effective way to change the electric field distribution and generate rich interfaces. Fe 2 O 3 /MoO 2 /Fe 2 (MoO 4 ) 3 anode materials with heterostructures have been successfully synthesized by electrospinning combined with subsequent heat treatment. The sample obtained at 600 °C (FMO-600) exhibits excellent cyclic stability and rate performance. The capacity retention rate of the FMO-600 electrode is as high as 79.75% (986.6 mAh•g −1 after 450 cycles at 1 A•g −1 ), and the average specific capacity barely drops by 0.045% per cycle. It is important to note that even at a high current density of 5 A•g −1 , the FMO-600 electrode still exhibits an impressive specific capacity (615.6 mAh•g −1 ). Density functional theory (DFT) computations theoretically prove the formation of built-in electric fields. The higher Li + diffusion coefficient and lower electron transfer resistance of the FMO-600 electrode enhance the reaction kinetics during discharge/charge processes, while the interface effect contributes to outstanding cycling stability. This work sheds light on the rational design of high energy/power density lithium-ion battery anode materials.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

Chen,

Wu,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

Self Cite

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show abstract

“…The additional capacity was thought to be related to the electrolyte-derived solid electrolyte interphase (SEI) lm [13]. Yu heterostructure with a lithiation capacity of 1081 mAh g − 1 at 0.1 A g − 1 [14]. Qiao et al constructed the RGO/NiCo 2 O 4 @C material with an initial lithiation capacity of 2048 mAh g − 1 at 0.3 A g − 1 [15].…”

Section: Introductionmentioning

confidence: 99%

The improved cycling stability of nanostructured NiCo2O4 anodes for lithium and sodium ion batteries

Tang

Ren

et al. 2023

Ionics

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Developing the high-capacity anode materials such as conversion-type metal oxides which possess both Li and Na storage activity is very practical for the high-energy LIBs/SIBs. Herein, we use NiCo 2 O 4 anodes as a model to investigate the morphology evolution which accounts for the poor cycling performance and understand the effect of structure optimization on the electrochemical performance. Three NiCo 2 O 4 samples with different morphologies of microspheres, nanospheres and nanosheets are synthesized.Firstly, the serious structural degradation of NiCo 2 O 4 microspheres is observed whether it works as a LIB or SIB anode. In addition, a signi cant difference between the lithiation and sodiation capacity of NiCo 2 O 4 materials reveals Na + ions only partially intercalated in NiCo 2 O 4 and the conversion reaction limited by the strain. Next, NiCo 2 O 4 nanosheets on Ni foam as a binder-free anode for LIBs are investigated which suggest the positive effect of 3D nanostructures on the morphology stability. As a result, NiCo 2 O 4 nanosheets deliver a high lithiation capacity of 1092 mAh g − 1 after 100 cycles at 0.5 A g − 1 and an excellent rate capacity of 643 mAh g − 1 at 4 A g − 1 . Finally, NiCo 2 O 4 nanospheres are evaluted as a SIB anode which indicate the smaller particle size of active materials is bene cial to the release of stress and structure stability during discharge-charge processes. A rational design of the electrode' architecture is very important for the conversion-type 3d transition metal oxide anodes for advanced LIBs and SIBs.

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Graphene encapsulated NiO-Co3O4 open-ended hollow nanocube anode with enhanced performance for lithium/sodium ion batteries

Chen,

Guan,

Zhang

et al. 2024

Journal of Alloys and Compounds

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Tuning the annealing temperature to achieve heterostructured nanofibers for high performance lithium-ion batteries

Abstract: Heterointerfaces not only provide more sites for lithium ions storage, but also reduce the damage of electrode active materials, which are conducive to boosting the capacity and cycle stability of...

Cited by 4 publications

References 84 publications

Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

The improved cycling stability of nanostructured NiCo2O4 anodes for lithium and sodium ion batteries

Graphene encapsulated NiO-Co3O4 open-ended hollow nanocube anode with enhanced performance for lithium/sodium ion batteries

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