Iron oxide-carbon nanocomposites modified by organic ligands: Novel pore structure design of anode materials for lithium-ion batteries

Jeong, Yohan; Park, Joongwon; Lee, Sang‐Hyun; Oh, Si Hun; Kim, Won Jik; Ji, Young Jun; Park, Gun Youl; Seok, Dohyeong; Shin, Weon Ho; Oh, Jong‐Min; Lee, Taek; Park, Chulhwan; Seubsai, Anusorn; Sohn, Hiesang

doi:10.1016/j.jelechem.2021.115905

Cited by 7 publications

(4 citation statements)

References 78 publications

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“…For filling efficiencies of the order of 10%-20% the magnitude of the capacity is almost similar for different oxide@CNT samples, however the cyclic stability significantly improves with encapsulation, as is evident from figure 6. Since oxide/CNT hybrids are extensively investigated for battery applications, we present a table to distinguish oxide/CNT hybrids in which oxide is synthetically encapsulated within the core cavity of CNT [2, 3, 17, [18] CoOx@CNT Oxide@CNT ---CoOx@CNT Oxide@CNT 100 475 [50] This work 18,20], from the ones in which CNT and Oxides are synthesized separately and then pressed together [16,22,23,25,26,[28][29][30][31][32][33][34]. Table 1 shows a comparison of discharge capacities of various oxides containing both types of Oxide/CNT hybrids along with the bare oxides, in a similar range of current density.…”

Section: Encapsulation and Superior Cyclic Stabilitymentioning

confidence: 99%

“…Actual encapsulation of the active material within the core cavity of CNT should, thus, circumvent the problem of capacity fading associated with volumetric strains, as opposed to that of oxide/CNT hybrids in which CNTs and TMOs are pressed together and hence oxide resides outside CNT. It is also to be noted that, while FeO x @CNT has been tested as an anode material [2,13,20,28,33,36], to the best of our knowledge CoO x & NiO x @CNT with significant filling efficiencies (within the core cavity of the CNT) such as presented in this work have not yet been explored for LIBs. This is primarily due to difficulties related to the synthesis of NiO & CoO x @CNT [37].…”

Section: Introductionmentioning

confidence: 97%

“…In order to do so, we first distinguish two distinct scenarios pertaining to the usage of CNT/TMO hybrids for LIBs in the literature. In the first case, the CNT and the TMOs are synthesized separately and pressed together to form the composite [16,22,23,25,26,[28][29][30][31][32][33][34]. In the second type, such hybrids are formed by synthetically encapsulating the oxide within the core cavity of the CNTs [2,3,17,18,20,35].…”

Section: Introductionmentioning

confidence: 99%

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Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials

Kapoor

Patrike

Singh

et al. 2023

J. Phys. D: Appl. Phys.

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We report a comparative study on the electrochemical performance of four different Transition Metal Oxides encapsulated inside carbon nanotubes (Oxide@CNT), along with a reference data obtained on a bare-oxide. A key result here is that the encapsulation leads to superior cyclic stability, irrespective of the type of the oxide-encapsulate. This comparison also enables us to isolate the advantages associated with the encapsulation of oxide within the core cavity of CNT, as opposed to the case of oxide/CNT composites, in which oxide resides outside the CNT. Innovative use of camphor during sample synthesis enables precise control over the morphology of the filled CNT, which can be either in aligned-forest or in entangled geometry. Morphology appears to play a crucial role in tuning the magnitude of the specific capacity, whereas the encapsulation relates to the cyclic stability. Overall, the electrochemical data on various Oxides@CNT bring forward interesting inferences pertaining to the morphology, filling fraction of the oxide-encapsulate, and the presence of oxide nano-particles adhering outside the CNT. Our results provides useful pointers for optimization of these critical parameters, thus paving the way for Oxide@CNT for practical electrochemical applications.

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Section: Encapsulation and Superior Cyclic Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials

Kapoor

Patrike

Singh

et al. 2023

J. Phys. D: Appl. Phys.

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“…It has greatly reshaped our lives, and the continuous improvement in its derivatives in materials and chemistry may determine our energy future. Among the anode materials of lithium-ion batteries, the conversion anode material has a high specific capacity and a wide source of materials [10][11][12][13]. However, in the process of charging and discharging, there will be obvious volume change, which will cause the collapse of the material structure.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nitrogen-Doped ZnFe2O4-Modified Carbon Composite and Its Collaborative Energy Storage Mechanism

Wang

Bai³

et al. 2023

Coatings

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The pyrolytic carbon of polymer adsorbent resin (SAP) is used as a waste carbon source, which can be used as a porous carbon network via pyrolysis to remove surface sodium carbonate and other substances. In this paper, a ZnFe2O4/nitrogen-doped porous carbon composite was prepared using the template method. Through the high-temperature carbonization of a polymer and crystallization of inorganic elements, the morphology of the composite showed uniform load characteristics. This well-defined structure and morphology facilitate the transport of Li+, enhance the effective contact area with the electrolyte, and provide a wealth of active sites. For the SAP-Fe/Zn anode, at a high current density of 0.1 A g−1, the reversible capacity of the anode reached 753 mAh g−1 after 200 cycles, showing excellent magnification performance. The final modified SAP-Fe/Zn&NC electrode had a reversible capacity of 205.6 mAh g−1 after 1000 cycles at the high current density of 2 A g−1, and the cycle retention rate was as high as 80.7%. The enhanced electrochemical performance can be attributed to the abundant active sites and shortened diffusion pathway of the composite. This ensures adequate conversion reactions during the Li-litization process between Zn, Fe, and Li+, alleviates volume expansion, and prevents comminution/aggregation during long cycles at high current densities.

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The Influence of the Copolymerization Ratio of Aromatic Monomers on the Structure and Catalytic Activity of Polymer Solid Acids

Song,

Wang,

Yuan

et al. 2023

J Polym Environ

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Iron oxide-carbon nanocomposites modified by organic ligands: Novel pore structure design of anode materials for lithium-ion batteries

Cited by 7 publications

References 78 publications

Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials

Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials

Preparation of Nitrogen-Doped ZnFe2O4-Modified Carbon Composite and Its Collaborative Energy Storage Mechanism

The Influence of the Copolymerization Ratio of Aromatic Monomers on the Structure and Catalytic Activity of Polymer Solid Acids

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