Direct Pre-lithiation of Electropolymerized Carbon Nanotubes for Enhanced Cycling Performance of Flexible Li-Ion Micro-Batteries

Carbon nanotubes (CNT) are used as anodes for flexible Li-ion micro-batteries. However, one of the major challenges in the growth of flexible micro-batteries with CNT as the anode is their immense capacity loss and a very low initial coulombic efficiency. In this study, we report the use of a facile direct pre-lithiation to suppress high irreversible capacity of the CNT electrodes in the first cycles. Pre-lithiated polymer-coated CNT anodes displayed good rate capabilities, studied up to 30 C and delivered high capacities of 850 mAh g−1 (313 μAh cm−2) at 1 C rate over 50 charge-discharge cycles.

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High-coulombic-efficiency Si-based hybrid microspheres synthesized by the combination of graphene and IL-derived carbon

Journal of Materials Chemistry A ◽

10.1039/c5ta03861h ◽

2015 ◽

Vol 3 (42) ◽

pp. 20935-20943 ◽

Cited By ~ 17

Author(s):

Sang-Hoon Park ◽

Dongjoon Ahn ◽

Young-Min Choi ◽

Kwang Chul Roh ◽

Kwang-Bum Kim

Keyword(s):

Energy Efficiency ◽

Coulombic Efficiency ◽

Li Ion Batteries ◽

Irreversible Capacity ◽

Full Cell ◽

Capacity Loss ◽

Cell Capacity ◽

Li Ion ◽

Initial Coulombic Efficiency ◽

High Coulombic Efficiency

The low initial coulombic efficiency of a Si-based anode can hinder the performance of practical full-cell Li-ion batteries (LIBs), as the irreversible capacity loss of the anode can diminish the reversible full-cell capacity and the energy efficiency.

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MnO2 Nanoparticles Anchored Multi Walled Carbon Nanotubes as Potential Anode Materials for Lithium Ion Batteries

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19440 ◽

2021 ◽

Vol 21 (10) ◽

pp. 5296-5301

Author(s):

Ahmad Umar ◽

Faheem Ahmed ◽

Ahmed A. Ibrahim ◽

Hassan Algadi ◽

Hasan B. Albargi ◽

...

Keyword(s):

Carbon Nanotubes ◽

Anode Materials ◽

Coulombic Efficiency ◽

Lithium Ion ◽

Reversible Capacity ◽

Li Ion Battery ◽

Multi Walled Carbon Nanotubes ◽

Li Ion ◽

Walled Carbon Nanotubes ◽

Charge Discharge

Herein, we report a facile hydrothermal synthesis of MnO2 nanoparticles anchored multi walled carbon nanotubes (MnO2@MWCNTs) as potential anode materials for lithium-ion (Li-ion) batteries. The prepared MnO2@MWCNTs were characterized by several techniques which confirmed the formation of MnO2 nanoparticles anchored MWCNTs. The X-ray diffraction and Raman-scattering analyses of the prepared material further revealed the effective synthesis of MnO2@MWCNTs. The fabricated Li-ion battery based on MnO2@MWCNTs exhibited a reversible capacity of ~823 mAhg−1 at a current density of 100 mAg−1 for the first cycle, and delivered a capacity of ~421 mAhg−1 for the 60 cycles. The coulombic efficiency was found to be ~100% which showed excellent reversible charge–discharge behavior. The outstanding performance of the MnO2@MWCNTs anode for the Li-ion battery can be attributed to the distinctive morphology of the MnO2 nanoparticles anchored MWCNTs that facilitated the fast transport of lithium ions and electrons and accommodated a broad volume change during the cycles of charge/discharge.

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Dealloying-Derived Nanoporous Cu6Sn5 Alloy as Stable Anode Materials for Lithium-Ion Batteries

Materials ◽

10.3390/ma14154348 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4348

Author(s):

Chi Zhang ◽

Zheng Wang ◽

Yu Cui ◽

Xuyao Niu ◽

Mei Chen ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Anode Materials ◽

Coulombic Efficiency ◽

Lithium Ion ◽

Specific Area ◽

Cycling Performance ◽

Ex Situ ◽

Li Ion ◽

Xrd Patterns ◽

Cu6sn5 Alloy

The volume expansion during Li ion insertion/extraction remains an obstacle for the application of Sn-based anode in lithium ion-batteries. Herein, the nanoporous (np) Cu6Sn5 alloy and Cu6Sn5/Sn composite were applied as a lithium-ion battery anode. The as-dealloyed np-Cu6Sn5 has an ultrafine ligament size of 40 nm and a high BET-specific area of 15.9 m2 g−1. The anode shows an initial discharge capacity as high as 1200 mA h g−1, and it remains a capacity of higher than 600 mA h g−1 for the initial five cycles at 0.1 A g−1. After 100 cycles, the anode maintains a stable capacity higher than 200 mA h g−1 for at least 350 cycles, with outstanding Coulombic efficiency. The ex situ XRD patterns reveal the reverse phase transformation between Cu6Sn5 and Li2CuSn. The Cu6Sn5/Sn composite presents a similar cycling performance with a slightly inferior rate performance compared to np-Cu6Sn5. The study demonstrates that dealloyed nanoporous Cu6Sn5 alloy could be a promising candidate for lithium-ion batteries.

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Single-walled carbon nanotubes as stabilizing agents in red phosphorus Li-ion battery anodes

RSC Advances ◽

10.1039/c7ra06601e ◽

2017 ◽

Vol 7 (63) ◽

pp. 39997-40004 ◽

Cited By ~ 14

Author(s):

Jasmin Smajic ◽

Amira Alazmi ◽

Shashikant P. Patole ◽

Pedro M. F. J. Costa

Keyword(s):

Carbon Nanotubes ◽

Lithium Ion ◽

Single Walled Carbon Nanotubes ◽

Red Phosphorus ◽

Stabilizing Agents ◽

Single Walled Carbon ◽

Capacity Loss ◽

Structural Breakdown ◽

Li Ion ◽

Walled Carbon Nanotubes

Structural breakdown and capacity loss of a red phosphorus-based anode material for lithium-ion batteries have been considerably attenuated with the addition of single-walled carbon nanotubes.

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Electrochemical performance of anodized TiO2 Nanotubes for rechargeable Lithium Batteries

MRS Proceedings ◽

10.1557/opl.2011.1340 ◽

2011 ◽

Vol 1333 ◽

Author(s):

R. Prasada Rao ◽

L. Kangle ◽

S. Adams ◽

M.V. Reddy ◽

B.V.R. Chowdari

Keyword(s):

Lithium Batteries ◽

Coulombic Efficiency ◽

Cycling Performance ◽

Rechargeable Lithium Batteries ◽

Electrochemical Test ◽

Cycle Rate ◽

Storage Performance ◽

Electrochemical Storage ◽

Charge Discharge ◽

Discharge Curves

ABSTRACTThe electrochemical storage performance of anatase TiO2 nanotubes (NT) is compared to the performance of TiO2 nanotubes covered by sulfur. Charge/discharge curves and cycling performance of TiO2 NT with and without sulfur deposition with respect to lithium anodes are demonstrated in electrochemical test cells. At 0.5C cycle rate the TiO2 NT exhibited a first cycle specific charge/discharge capacity of 180/155 mAh/g, whereas the TiO2 NT deposited with sulfur showed a remarkably higher performance at 0.5C cycle rate with first cycle charge/ discharge specific capacities of 258/260 mAh/g and a coulombic efficiency of 98%.

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Layered-spinel capped nanotube assembled 3D Li-rich hierarchitectures for high performance Li-ion battery cathodes

Journal of Materials Chemistry A ◽

10.1039/c6ta05676h ◽

2016 ◽

Vol 4 (47) ◽

pp. 18416-18425 ◽

Cited By ~ 41

Author(s):

Fu-Da Yu ◽

Lan-Fang Que ◽

Zhen-Bo Wang ◽

Yin Zhang ◽

Yuan Xue ◽

...

Keyword(s):

High Performance ◽

Diffusion Rate ◽

Li Ion Batteries ◽

Li Ion Battery ◽

Cycle Stability ◽

Ion Diffusion ◽

Irreversible Capacity ◽

Capacity Loss ◽

Li Ion ◽

Resultant Material

We report an effective approach to fabricate layered-spinel capped nanotube assembled 3D Li-rich hierarchitectures as a cathode material for Li-ion batteries. The resultant material exhibits a reduced first-cycle irreversible capacity loss, rapid Li-ion diffusion rate and excellent cycle stability.

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Boron-doped porous Si anode materials with high initial coulombic efficiency and long cycling stability

Journal of Materials Chemistry A ◽

10.1039/c7ta10153h ◽

2018 ◽

Vol 6 (7) ◽

pp. 3022-3027 ◽

Cited By ~ 46

Author(s):

Ming Chen ◽

Bo Li ◽

Xuejiao Liu ◽

Ling Zhou ◽

Lin Yao ◽

...

Keyword(s):

Anode Materials ◽

Coulombic Efficiency ◽

Reversible Capacity ◽

Cycling Performance ◽

Cycling Stability ◽

Porous Si ◽

Boron Doped ◽

Si Anode ◽

Initial Coulombic Efficiency

B-Doped pSi exhibits an exceptionally high initial coulombic efficiency of 89% and shows outstanding cycling performance (reversible capacity of 1500 mA h g−1 at 2 A g−1 after 300 cycles).

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