Carbon quantum dot coated Mn<sub>3</sub>O<sub>4</sub> with enhanced performances for lithium-ion batteries

Jing, Mingjun; Wang, Jufeng; Hou, Hongshuai; Yang, Yingchang; Zhang, Yan; Pan, Chengchi; Chen, Jun; Zhu, Yirong; Ji, Xiaobo

doi:10.1039/c5ta03610k

Cited by 104 publications

(60 citation statements)

References 39 publications

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“…[45] The peak at 2.13 Vi sa ttributed to the oxidation of MnO to Mn 3 O 4 . [46] Interestingly,t he intensity of this peak is stronger than that of most reported Mn 3 O 4 anode materials, which illustrates the excellent electrochemical reversibility of the conversion reaction from MnO into Mn 3 O 4 .I nt he second cycle, the reduction peak migrated to ah igher voltage of 0.26 V, which might be relatedt os tructuralr earrangements. Additionally,t he oxidation peaks did not change much.…”

Section: Resultsmentioning

confidence: 78%

“…For the anodic segment, the broad peak located at 1.34 V resulted from the oxidation of metallic Mn to MnO and the decomposition of Li 2 O . The peak at 2.13 V is attributed to the oxidation of MnO to Mn 3 O 4 . Interestingly, the intensity of this peak is stronger than that of most reported Mn 3 O 4 anode materials, which illustrates the excellent electrochemical reversibility of the conversion reaction from MnO into Mn 3 O 4 .…”

Section: Resultsmentioning

confidence: 84%

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In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Zhang

Jiang

et al. 2018

Chemistry A European J

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The practical applications of Mn O in lithium-ion batteries are greatly hindered by fast capacity decay and poor rate performance as a result of significant volume changes and low electrical conductivity. It is believed that the synthesis of nanoscale Mn O combined with carbonaceous matrix will lead to a better electrochemical performance. Herein, a convenient route for the synthesis of Mn O nanoparticles grown in situ on hollow carbon nanofiber (denoted as HCF/Mn O ) is reported. The small size of Mn O particles combined with HCF can significantly alleviate volume changes and electrical conductivity; the strong chemical interactions between HCF and Mn O would improve the reversibility of the conversion reaction for MnO into Mn O and accelerate charge transfer. These features endow the HCF/Mn O composite with superior cycling stability and rate performance if used as the anode for lithium-ion batteries. The composite delivers a high discharge capacity of 835 mA h g after 100 cycles at 200 mA g , and 652 mA h g after 240 cycles at 1000 mA g . Even at 2000 mA g , it still shows a high capacity of 528 mA h g . The facile synthetic method and outstanding electrochemical performance of the as-prepared HCF/Mn O composite make it a promising candidate for a potential anode material for lithium-ion batteries.

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 84%

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

Zhang

Jiang

et al. 2018

Chemistry A European J

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“…In an effort to achieve better electrochemical properties, Jing et al prepared CQD coated Mn 3 O 4 samples (Mn 3 O 4 /CQDs) through an alternating voltage electrochemical route. CQDs were easily fabricated via the electrochemical anodic oxidation of alcohol.…”

Section: Batteriesmentioning

confidence: 99%

Section: Batteriesmentioning

confidence: 99%

The Research Development of Quantum Dots in Electrochemical Energy Storage

Zhan

et al. 2018

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Quantum dots, which are made from semiconductor materials, possess tunable physical dimensions and outstanding optoelectronic characteristics, and they have aroused widespread interest in recent years. In addition to applications in biomolecular analysis, sensors, organic photovoltaic devices, fluorescence, solar cells, photochemical reagents, light-emitting diodes, and catalysis, quantum dots have attracted mounting attention in the field of electrochemical energy storage owing to their size confinement and anisotropic geometry. In this review, a comprehensive summary is given and the research progress of the study of quantum dots for batteries and electrochemical capacitors in recent years, including their synthesis methods, micro/nanostructural features, and electrochemical performance, is appraised.

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“…Among the most suitable carbon matrixes, amorphous carbon, with loose frameworks and intrinsically isotropic nature, has drawn particular attention. In terms of preparing nanosize materials, common techniques include electrochemical method, thermal decomposition, as well as ball‐milling method . However, these methods above may result in different surface structures and inhomogeneous material properties.…”

Section: Introductionmentioning

confidence: 99%

Dual Functions of Potassium Antimony(III)‐Tartrate in Tuning Antimony/Carbon Composites for Long‐Life Na‐Ion Batteries

Zhang

Hou

et al. 2018

Adv Funct Materials

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Antimony holds a high-specific capacity as a promising anode material for Na-ion batteries (SIBs) and much research is focused on solving the poor cycling stability issue associated with its large volume expansion during alloying/dealloying processes. Here, self-thermal-reduction method is successfully applied to prepare antimony/carbon rods (Sb/C rods) utilizing potassium antimony(III)tartrate (C 8 H 10 O 15 Sb 2 K 2 ) as a dual source of carbon matrix and metallic antimony. According to theory calculations and experiment results, the formation process is explicitly explored as follows: C 8 H 10 O 15 Sb 2 K 2 → Sb 2 O 3 /C → Sb 2 O 3 / Sb/C → Sb/C rods. Notably, organic ligands in C 8 H 10 O 15 Sb 2 K 2 can be gradually turned into amorphous carbon with simultaneous reduction of Sb 3+ to metal Sb. Moreover, potassium chloride acts as an activator and a template during the course of carbonization, and synchronous reduction is introduced. Consequently, an antimony/carbon electrode material denoted as SbOC/C is formed, exhibiting a unique dual-carbon-modified structure and extensive SbOC bridge bonds that give rise to outstanding cycling performance and rate capacity. Specifically, the capacity is maintained at 404 mA h g −1 with 89% retention after 700 cycles at 500 mA g −1 . The low-cost, self-thermal-reduction method and excellent electrode performances of electrode material make it attractive for large-scale energy storage systems.

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Carbon quantum dot coated Mn₃O₄ with enhanced performances for lithium-ion batteries

Cited by 104 publications

References 39 publications

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

The Research Development of Quantum Dots in Electrochemical Energy Storage

Dual Functions of Potassium Antimony(III)‐Tartrate in Tuning Antimony/Carbon Composites for Long‐Life Na‐Ion Batteries

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Carbon quantum dot coated Mn3O4 with enhanced performances for lithium-ion batteries

Cited by 104 publications

References 39 publications

In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn3O4 Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

The Research Development of Quantum Dots in Electrochemical Energy Storage

Dual Functions of Potassium Antimony(III)‐Tartrate in Tuning Antimony/Carbon Composites for Long‐Life Na‐Ion Batteries

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Product

Resources

About

Carbon quantum dot coated Mn₃O₄ with enhanced performances for lithium-ion batteries

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode

In Situ Synthesis of Mn₃O₄ Nanoparticles on Hollow Carbon Nanofiber as High‐Performance Lithium‐Ion Battery Anode