Li2ZnTi3O8/C anode with high initial Coulombic efficiency, long cyclic life and outstanding rate properties enabled by fulvic acid

Carbon ◽  
2020 ◽  
Vol 163 ◽  
pp. 297-307 ◽  
Author(s):  
Jia-Li Qin ◽  
Hui-Ling Zhu ◽  
Ning Lun ◽  
Yong-Xin Qi ◽  
Yu-Jun Bai
Keyword(s):  
Fulvic Acid ◽  
Coulombic Efficiency ◽  
Cyclic Life ◽  
Initial Coulombic Efficiency

A Universal Strategy toward the Precise Regulation of Initial Coulombic Efficiency of Li‐Rich Mn‐Based Cathode Materials

2021 ◽  
pp. 2103173
Author(s):  
Weibin Guo ◽  
Chenying Zhang ◽  
Yinggan Zhang ◽  
Liang Lin ◽  
Wei He ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Coulombic Efficiency ◽  
Initial Coulombic Efficiency

Nano-size porous carbon spheres as a high-capacity anode with high initial coulombic efficiency for potassium-ion batteries

2020 ◽  
Vol 5 (5) ◽  
pp. 895-903 ◽  
Author(s):  
Hehe Zhang ◽  
Chong Luo ◽  
Hanna He ◽  
Hong-Hui Wu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Porous Carbon ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Potassium Ion ◽  
Carbon Spheres ◽  
Hard Carbon ◽  
Porous Carbon Spheres ◽  
Nano Size ◽  
Initial Coulombic Efficiency

An anode of hard carbon spheres with both small size and a porous structure enables superior electrochemical performance of potassium-ion batteries.

scholarly journals Negligible Voltage Hysteresis with Strong Anionic Redox in Conventional Battery Electrode

2020 ◽  
Author(s):  
Kehua Dai ◽  
Jing Mao ◽  
Zengqing Zhuo ◽  
Guo Ai ◽  
Wenfeng Mao ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Redox Reactions ◽  
Coulombic Efficiency ◽  
Redox Systems ◽  
Redox Mechanism ◽  
Practical Applications ◽  
Battery Electrode ◽  
Voltage Hysteresis ◽  
First Time ◽  
Initial Coulombic Efficiency

<div>Lattice oxygen redox reactions (ORR) offers opportunities for developing highcapacity batteries, however, suffers the notoriously high voltage hysteresis and low initial coulombic efficiency, which hinder its practical applications. Particularly, ORR was widely considered inherent to these kinetic issues. In this paper, unambiguous evidence of strong and reversible ORR is found in Na<sub>2/3</sub>Ni<sub>1/3</sub>Mn<sub>2/3</sub>O<sub>2</sub>, which displays negligible voltage hysteresis (0.1 V) and high initial coulombic efficiency with a highly stable electrochemical profile. Our independent and quantitative analysis of all the Ni, Mn and O states consistently interpret the redox mechanism of Na<sub>2/3</sub>Ni<sub>1/3</sub>Mn<sub>2/3</sub>O<sub>2</sub>, which reveals, for the first time, a conventional 3d transition-metal ORR system with facile kinetics and highly stable electrochemical profile that previously found only in cationic redox systems.</div>

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.

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

2018 ◽  
Vol 6 (7) ◽  
pp. 3022-3027 ◽  
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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