Swelling-Controlled Double-Layered SiOx/Mg2SiO4/SiOx Composite with Enhanced Initial Coulombic Efficiency for Lithium-Ion Battery

2021 ◽  
Vol 13 (6) ◽  
pp. 7161-7170
Author(s):  
Asif Raza ◽  
Jae Yup Jung ◽  
Cheol-Ho Lee ◽  
Byung Gon Kim ◽  
Jeong-Hee Choi ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Initial Coulombic Efficiency

scholarly journals Effects of Alumina Films on N-Doped Carbon Nanotubes/Graphene Composites as Anode Materials of Lithium-Ion Batteries

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Chuen-Chang Lin ◽  
Shu-Pei Hsu ◽  
Guang-Jhong Chen
Keyword(s):  
Carbon Nanotubes ◽  
Lithium Ion Battery ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
Discharge Process ◽  
Charge Capacity ◽  
Graphene Composite ◽  
Coin Cell ◽  
Initial Coulombic Efficiency

A carbon nanotubes/graphene composite is grown on nickel foil without additional catalysts by one-step ambient pressure chemical vapor deposition (CVD). Next, the carbon nanotubes/graphene composite is modified by radio frequency (RF) nitrogen plasma. Finally, to improve its initial coulombic efficiency/electrochemical stability, lower potential during the charge process (coin cell), and boost potential during the discharge process (lithium-ion battery), alumina is deposited onto the N-doped carbon nanotubes/graphene composite by RF magnetron sputtering at different power levels and periods of time. The charge specific capacity (597 mAh/g) and initial coulombic efficiency (81.44% > 75.02% for N-doped carbon nanotubes/graphene) of Al2O3/N-doped CNTs/graphene for the coin cell reached a maximum at the best sputtering condition ( power = 65   W and time = 30   min ). Al2O3/N-doped CNTs/graphene (the best sputtering condition) exhibits higher initial coulombic efficiency (79.8%) compared with N-doped CNTs/graphene (initial coulombic efficiency: 74.3%) for the lithium-ion battery. Furthermore, the achievement fraction (about 70%) of full charge capacity (coin cell) for Al2O3/N-doped carbon nanotubes/graphene (the best sputtering condition) is higher than that (about 30%) for N-doped carbon nanotubes/graphene at a voltage lower than about 0.25 V. Moreover, it also shows a little higher electrochemical stability (coin cell) of charge capacity for Al2O3/N-doped carbon nanotubes/graphene (the best sputtering condition) in comparison with N-doped carbon nanotubes/graphene and Al2O3/N-doped CNTs/graphene (the best sputtering condition) exhibits better cyclic stability (lithium-ion battery) of discharge capacity compared with N-doped CNTs/graphene.

Gas-phase oxidation modification strategy of spent graphite from spent LiFePO4 with enhanced initial coulombic efficiency for lithium-ion battery anodes

2021 ◽  
Author(s):  
Zheng Li ◽  
songxian Li ◽  
tao wang ◽  
Kai Yang ◽  
Zhongliang Tian ◽  
...  
Keyword(s):  
Environmental Protection ◽  
Lithium Ion Battery ◽  
Gas Phase ◽  
Significant Role ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Phase Oxidation ◽  
Gas Phase Oxidation ◽  
Initial Coulombic Efficiency

Recycling graphite from spent LiFePO4 batteries plays a significant role in relieving the shortage of environmental protection and waste of valuable resources. However, low initial coulombic efficiency (ICE) and poor...

scholarly journals Modified SiO hierarchical structure materials with improved initial coulombic efficiency for advanced lithium-ion battery anodes

RSC Advances ◽  
2019 ◽  
Vol 9 (20) ◽  
pp. 11369-11376 ◽  
Author(s):  
Lizhao Xie ◽  
Hui Liu ◽  
Shaoxiong Lin ◽  
Xulai Yang ◽  
Meizhou Qi ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Hierarchical Structure ◽  
High Performance ◽  
Carbon Coating ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Simple Method ◽  
Initial Coulombic Efficiency

A simple method of prelithiation of SiO along with carbon coating to achieve high performance SiO-based materials.

scholarly journals Fabrication and Characterization of Nylon 66/PAN Nanofibrous Film Used as Separator of Lithium-Ion Battery

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1984
Author(s):  
Yu-Hsun Nien ◽  
Chih-Ning Chang ◽  
Pao-Lin Chuang ◽  
Chun-Han Hsu ◽  
Jun-Lun Liao ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Batteries ◽  
Lithium Battery ◽  
Coulombic Efficiency ◽  
Electronic Devices ◽  
Lithium Ion ◽  
Nylon 66 ◽  
Excellent Electrochemical Performance ◽  
Fabrication And Characterization

In recent years, portable electronic devices have flourished, and the safety of lithium batteries has received increasing attention. In this study, nanofibers were prepared by electrospinning using different ratios of nylon 66/polyacrylonitrile (PAN), and their properties were studied and compared with commercial PP separators. The experimental results show that the addition of PAN in nylon 66/PAN nanofibrous film used as separator of lithium-ion battery can enhance the porosity up to 85%. There is also no significant shrinkage in the shrinkage test, and the thermal dimensional stability is good. When the Li/LiFePO4 lithium battery is prepared by nylon 66/PAN nanofibrous film used as separator, the capacitor can be maintained at 140 mAhg−1 after 20 cycles at 0.1 C, and the coulombic efficiency is still maintained at 99%, which has excellent electrochemical performance.

Effect of Fluorine Content on the Electrochemical Properties of PVDF-Derived Carbons for Lithium Ion Battery

2012 ◽  
Vol 463-464 ◽  
pp. 730-733 ◽  
Author(s):  
Lu Shi ◽  
Chao Lin Miao ◽  
Gai Rong Chen ◽  
Bin Xu ◽  
Shi Chen
Keyword(s):  
Electrochemical Properties ◽  
Carbon Materials ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Fluorine Content ◽  
Lithium Ion ◽  
Bet Surface Area ◽  
Different Temperatures ◽  
Positive Effect ◽  
Initial Coulombic Efficiency

The carbon materials prepared by PVDF carbonization at different temperatures have similar BET surface area and pores volume. The content of fluorine in the carbons decreased with the carbonization temperature from 1.46% (atm %) at 600°C to 0.18 %( atm %) at 1000°C. The first cycle specific capacity and the initial coulombic efficiency decreases with the decrease of fluorine content in the samples. The first cycle discharge capacity decreased from 982 mAh/ g at 600°C to 752 mAh/ g at 1000°C and the initial coulombic efficiency decreased from 31.8% at 600°C to 24% at 1000°C. It is believed that fluorine contained in the carbon materials has a positive effect to improve the electrochemical properties as anode materials for Li-ion batteries.

A Review on Recent Advances for Boosting Initial Coulombic Efficiency of Silicon Anodic Lithium Ion batteries

Small ◽  
2021 ◽  
pp. 2102894
Author(s):  
Lin Sun ◽  
Yanxiu Liu ◽  
Jun Wu ◽  
Rong Shao ◽  
Ruiyu Jiang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Recent Advances ◽  
Initial Coulombic Efficiency

scholarly journals Effect of Current Rate and Prior Cycling on the Coulombic Efficiency of a Lithium-Ion Battery

Batteries ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 57 ◽  
Author(s):  
Seyed Madani ◽  
Erik Schaltz ◽  
Søren Knudsen Kær
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Degradation Behavior ◽  
Battery Cell ◽  
The Third ◽  
Capacity Loss ◽  
Battery Cells

The determination of coulombic efficiency of the lithium-ion batteries can contribute to comprehend better their degradation behavior. In this research, the coulombic efficiency and capacity loss of three lithium-ion batteries at different current rates (C) were investigated. Two new battery cells were discharged and charged at 0.4 C and 0.8 C for twenty times to monitor the variations in the aging and coulombic efficiency of the battery cell. In addition, prior cycling was applied to the third battery cell which consist of charging and discharging with 0.2 C, 0.4 C, 0.6 C, and 0.8 C current rates and each of them twenty times. The coulombic efficiency of the new battery cells was compared with the cycled one. The experiments demonstrated that approximately all the charge that was stored in the battery cell was extracted out of the battery cell, even at the bigger charging and discharging currents. The average capacity loss rates for discharge and charge during 0.8 C were approximately 0.44% and 0.45% per cycle, correspondingly.

Sign in / Sign up

Export Citation Format

Share Document