Nano tube-in-tube CNT@void@TiO2@C with excellent ultrahigh rate capability and long cycling stability for lithium ion storage

Yuan, Y.F.; Chen, Qianqiao; Zhu, Min; Cai, Gaoshen; Guo, S.Y.

doi:10.1016/j.jallcom.2020.156795

Cited by 41 publications

(10 citation statements)

References 47 publications

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“…As battery-type materials with nanostructure generally have a large surface volume ratio, certain non-diffusion-related charge storage processes should be observed, especially at high scanning rates. Therefore, i V (current response at given potential) may be expressed by Equation (4) [ 31 , 32 ]:

where k 1 ν refers to surface-confined current and k 2 ν 1/2 refers to diffusion-controlled current. Herein, k 1 and k 2 can be achieved from the slope of the i - v curve and i - v 1/2 curve, respectively.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Study on Ni-Co Phosphite/Activated Carbon Fabric Composited Materials with Controllable Nano-Structure for Hybrid Super-Capacitor Applications

et al. 2021

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The advantage of low resistivity and inactive binders makes binder-free electrode an excellent candidate for high-performance energy devices. A simple hydrothermal method was used to fabricate M11(HPO3)8(OH)6 (M: Ni and Co) (MHP) arrays combined with activated carbon fabric (ACF) without binder. The structures of MHP can be easily tuned from bouquets to nano-sheets by the concentration of NaH2PO2. The MHP/ACF composite materials with different structures showed the typical battery-type characteristic of anodic electrodes. In a three-electrode cell configuration, the MHP nano-sheet arrays/ACF composite has a higher capacity, of 1254 F/g, at a scan rate of 10 mA/cm2 and shows better cycling stability: 84.3% remaining specific capacity after 1000 cycles of charge-discharge measurement. The composite is highly flexible, with almost the same electrochemical performance under stretching mode. The MHP/ACF composite@ACF hybrid supercapacitor can deliver the highest energy density, of 34.1 Wh·kg−1, and a power density of 722 W·kg−1 at 1 A·g−1. As indicated by the results, MHP/ACF composite materials are excellent binder-free electrodes, candidates for flexible high-performance hybrid super-capacitor devices.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Study on Ni-Co Phosphite/Activated Carbon Fabric Composited Materials with Controllable Nano-Structure for Hybrid Super-Capacitor Applications

et al. 2021

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“…To improve the specific capacity of TiO 2 , a large number of scientific researchers investigated different structures of TiO 2 , such as porous ( Nong et al, 2020 ), hollow nanosphere ( Fan et al, 2021 ), branch-like ( Gao et al, 2019 ), heterogeneous mesoporous hollow nanocage-in-nanocage, and sandwich structures ( Yuan et al, 2019 ). Additionally, many attempts to combine carbon with TiO 2 have been made ( Ni et al, 2019 ; Yuan et al, 2021 ). However, the specific capacity of TiO 2 has still not been significantly improved.…”

Section: Introductionmentioning

confidence: 99%

Robust α-Fe2O3@TiO2 Core–Shell Structures With Tunable Buffer Chambers for High-Performance Lithium Storage

et al. 2022

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α-Fe2O3 has high potential energy storage capacity and can serve as a green and low-cost anode material for lithium-ion batteries. However, α-Fe2O3 suffers large volume expansion and pulverization. Based on DFT calculations, TiO2 can effectively maintain the integrity of the crystal structure during the discharge/charge process. Well-defined cubic α-Fe2O3 is coated with a TiO2 layer using the hydrothermal method with the assistance of oxalic acid surface treatment, and then α-Fe2O3@TiO2 with tunable buffer chambers is obtained by altering the hydrochloric acid etching time. With the joint efforts of the buffer chamber and the robust structure of the TiO2 layer, α-Fe2O3@TiO2 alleviates the expansion of α-Fe2O3 during the discharge/charge process. The optimized sample (FT-1h) achieves good cycling performance. The reversible specific capacity remains at 893.7 mA h g-1, and the Coulombic efficiency still reaches up to 98.47% after 150 cycles at a current density of 100 mA g−1. Furthermore, the reversible specific capacity can return to 555.5 mA h g−1 at 100 mA g−1 after cycling at a high current density. Hence, the buffer chamber and the robust TiO2 layer can effectively improve the cycling stability and rate performance of α-Fe2O3.

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“…This structure provides abundant voids and a mechanically firm framework, which are spacious enough to house the extreme volume expansion of Si anode during continuous cycling and shorten the ion and electron transport pathways, leading to improved anode kinetics. [11] In addition, the introduction of electrically conductive carbonaceous materials, such as carbon nanotubes, [12,13] metal organic frameworks (MOFs), [14] and reduced graphene oxides, [15] is an operative approach for overcoming the problems of Si anodes, viz. their poor electrical conductivity.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

Min

Nazir

et al. 2022

Batteries & Supercaps

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In this work, we synthesized highly porous 3D sponge‐like mesoporous (MP)‐Si@C composites using mass‐scalable method. The optimized MP−Si@C 1 composite electrode, provided a reversible capacity of 1887 mAh g−1 after 100 discharge−charge cycles with capacity retention of 83 % at the rate of 0.1 C. At high C‐rate the MP−Si@C 1 anode provided reversible capacity of 910 mAh g−1 after 1000 cycles. The MP−Si@C 1/LCO full cell provide a discharge capacity of 1515 mAh g−1 and it works well for 100 cycles. This outstanding electrochemical behavior of the MP−Si@C 1 composite electrode was accredited to the exclusive structure of interconnected Si nanoparticles and the presence of the outer C thin layer. The carbon layer served as a shield, an effective buffer layer to house the extreme volume expansion issue of Si during continuous cycling. The excellent performance of the MP−Si@C 1 composite demonstrated its high applicability as potential anode material for next‐generation LIBs.

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Nano tube-in-tube CNT@void@TiO2@C with excellent ultrahigh rate capability and long cycling stability for lithium ion storage

Cited by 41 publications

References 47 publications

Synthesis and Study on Ni-Co Phosphite/Activated Carbon Fabric Composited Materials with Controllable Nano-Structure for Hybrid Super-Capacitor Applications

Synthesis and Study on Ni-Co Phosphite/Activated Carbon Fabric Composited Materials with Controllable Nano-Structure for Hybrid Super-Capacitor Applications

Robust α-Fe2O3@TiO2 Core–Shell Structures With Tunable Buffer Chambers for High-Performance Lithium Storage

Facile Fabrication of Highly Porous 3D Sponge‐Like Si@C Composites as High‐Performance Anode Materials for Lithium‐Ion Batteries

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