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.

SnSe/Cu2SnSe3 Heterojunction Structure with High Initial Coulombic Efficiency for Lithium-Ion Battery Anodes

2022 ◽  
Vol 905 ◽  
pp. 135-141
Author(s):  
Bao Juan Yang ◽  
Rui Xia ◽  
Su Bin Jiang ◽  
Mei Zhen Gao
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Thermal Method ◽  
Tin Selenide ◽  
Ion Doping ◽  
Initial Coulombic Efficiency

Due to high theoretical specific capacity and abundant reserves, tin selenide-based materials have received tremendous attentions in the fields of lithium-ion batteries. Nevertheless, the huge volume changes during insertion/de-intercalation processes deteriorate the Coulombic Efficiency greatly. In order to solve it, the researchers have made great efforts by means of controlling nanoparticles granularity, carbon coating, ion doping et al. In this study, SnSe/Cu2SnSe3 heterojunction nanocomposites were synthesized by solvo-thermal method. The resulting SnSe/Cu2SnSe3 is a three-dimensional flower-like hierarchical nanostructure composed of nanoscale thin lamellae of a thickness of 8-12 nm. The unique nanostructure could shorten the diffusion path of lithium ions and expedite charge transfer, and therefore enhance the reaction kinetics. Compared with SnSe, the initial Coulombic efficiency of SnSe/Cu2SnSe3 is raised from 59% to 90% as the anode material of lithium-ion batteries.

A scalable ternary SnO2–Co–C composite as a high initial coulombic efficiency, large capacity and long lifetime anode for lithium ion batteries

2018 ◽  
Vol 6 (16) ◽  
pp. 7206-7220 ◽  
Author(s):  
Tao Liang ◽  
Renzong Hu ◽  
Houpo Zhang ◽  
Hanyin Zhang ◽  
Hui Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Ball Milling ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Large Capacity ◽  
Long Lifetime ◽  
Initial Coulombic Efficiency

A new ternary SnO2–Co–C composite has been synthesized by facile and scalable ball milling, which demonstrates a high initial coulombic efficiency (ICE, with average of 80.8%), high reversible specific capacity and a long lifetime (610 mA h g−1 after 1000 cycles at 2 A g−1).

Self-assembly of silicon/carbon hybrids and natural graphite as anode materials for lithium-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 104995-105002 ◽  
Author(s):  
Aoning Wang ◽  
Fandong Liu ◽  
Zhoulu Wang ◽  
Xiang Liu
Keyword(s):  
Self Assembly ◽  
Anode Materials ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
Silicon Carbon ◽  
Good Cycling Stability ◽  
Initial Coulombic Efficiency ◽  
A Current

Si–C–NG composites exhibit a high specific capacity, a high initial coulombic efficiency, and a good cycling stability with capacity retention after 100 cycles at a current density of 100 mA g−1.

Synthesis and Electrochemical Properties of CoMn2O4 as Novel Material for Lithium Ion Battery Application

2020 ◽  
Vol 20 (12) ◽  
pp. 7665-7672
Author(s):  
Xiao Chen ◽  
Wei Dang ◽  
Chuanqi Feng
Keyword(s):  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Nano Particles ◽  
Calcination Temperatures ◽  
Different Temperatures ◽  
Battery Application

The pure phase CoMn2O4 samples are successfully prepared by solvothermal method combined with calcination at different temperatures (600, 700 and 800 °C). The structure and morphology for CoMn2O4 samples are characterized by X-ray diffraction (XRD) and Scanning electron microscopy (SEM) techniques. The electrochemical properties for different samples were tested by battery testing system and electrochemical workstation. The results showed that the calcination temperatures have important effects on their electrochemical properties. The sample synthesized at 600 °C (CMO-600) exhibits uniform microspheres composed of some nano-particles. As a novel anode material for lithium-ion batteries (LIBs). The CMO-600 has a reversible specific capacity of 1270 mA g−1 retained after 100 circles at current density of 100 mA g−1 under a potential window from 3.0 to 0.01 V (vs. Li+/Li). It exhibits both high reversible capacity and good rate performance. So CMO-600 is a promising anode material for lithium ion battery application.

scholarly journals Morphology, Conductivity and Electrochemical Properties of Hydrothermal Carbonized Porous Carbon Materials

2016 ◽  
Vol 3 (1) ◽  
pp. 46-55
Author(s):  
N. Nagirna ◽  
V. Mandzyuk
Keyword(s):  
Electrochemical Properties ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbonization Temperature ◽  
Electrochemical System ◽  
Plant Materials ◽  
Temperature Growth ◽  
Raw Plant Materials ◽  
Volume Decrease

The paper studies the morphology, conductivity and electrochemical properties ofcarbon materials, obtained from raw plant materials at different condition of hydrothermalcarbonization, using low-temperature porometry, impedance spectroscopy and galvanostaticcharge/discharge. It is set, that in porous structure of carbon materials micropores are dominant;when carbonization temperature increased the specific surface and pore volume decrease morethan 10 times. The temperature growth results in increasing the electrical conductivity of thecarbon material more than 6 orders. It is found, that the maximal value of specific capacity(1138 mА·h/g) has an electrochemical system based on porous carbon carbonized at 1023 K

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

Carbon coated porous silicon flakes with high initial coulombic efficiency and long-term cycling stability for lithium ion batteries

2019 ◽  
Vol 3 (9) ◽  
pp. 2361-2365 ◽  
Author(s):  
Xiaoyong Dou ◽  
Ming Chen ◽  
Jiantao Zai ◽  
Zhen De ◽  
Boxu Dong ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Next Generation ◽  
Carbon Coated ◽  
Initial Coulombic Efficiency

Silicon (Si) has been regarded as a promising next-generation anode material to replace carbon-based materials for lithium ion batteries (LIBs).

Si nanoflake-assembled blocks towards high initial coulombic efficiency anodes for lithium-ion batteries

2018 ◽  
Vol 54 (86) ◽  
pp. 12214-12217 ◽  
Author(s):  
Xiangyang Zhou ◽  
Yongpeng Ren ◽  
Juan Yang ◽  
Jing Ding ◽  
Jiaming Zhang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Coulombic Efficiency ◽  
Lithium Ion ◽  
Si Anodes ◽  
Initial Coulombic Efficiency

The initial coulombic efficiency of Si anodes is effectively improved via a Cu assisted Mg reduction.

Cu–Al–Si alloy anode material with enhanced electrochemical properties for lithium ion batteries

2019 ◽  
Vol 12 (04) ◽  
pp. 1950054 ◽  
Author(s):  
Huilin Fan ◽  
Youhong Wang ◽  
Mingxiang Yu ◽  
Kangkang Wang ◽  
Junting Zhang ◽  
...  
Keyword(s):  
Anode Material ◽  
Electrode Material ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Alloy Anode ◽  
Multiple Mixing ◽  
Negative Electrode Material ◽  
Circular Outline

The microstructure and electrochemical property of Cu–Al–Si alloy anode material are studied in this paper. The research shows that the alloy particle has a basic circular outline, and two copper-rich phases with different silicon contents are detected in the particle, and both phases with nanostructure are observed in its surface layer. The nano-silicon alloy negative electrode material needs to be used in a certain proportion with graphite, binder and conductive agent, and the stirring process also has an important influence on its electrochemical performance. Multiple mixing can achieve a better cycle retention compared to direct mixing. The first-cycle coulombic efficiency of the electrode material is improved up to about 90%, and the specific capacity is still higher than 500[Formula: see text]mAh[Formula: see text]g[Formula: see text] after 100 cycles. The battery manufacturing process is similar to the graphite negative electrode, so it is easy to be applied.

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