Surface fluorination of the cathode active materials for lithium secondary battery

Yonezawa, Suguru; Yamasaki, Masahiro; Takashima, Masayuki

doi:10.1016/j.jfluchem.2004.09.004

Cited by 37 publications

(27 citation statements)

References 13 publications

(12 reference statements)

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“…It seems that there is no change in the shape and morphology of LiNi 0.5 Mn 1.5 O 4 surface even when it was treated with F 2 gas at 373 K. The effect of fluorination on the surface morphology of LiMn 2 O 4 particles was not detected in SEM images. These results are similar to the SEM images of fluorinated LiMn 2 O 4[18].Figure 2.10 shows XRD profiles of untreated and fluorinated samples. There is no extra peak in the SEM images of untreated and fluorinated samples.…”

supporting

confidence: 76%

“…NF 3 is reactive at around 503 K due to the dissociation into %NF 2 radical and F atom, but fluorination reaction is likely to take place at LiFePO 4 surface even at room temperature (298 K). The BE of 685 eV indicates the existence of ionic fluorine, F − such as alkali metal fluorides in the solid samples [18]. Therefore the peak may correspond to F − having interaction with Li + in the sample.…”

Section: Characterization Of Fluorinated Lifepomentioning

confidence: 98%

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Electrochemical Behavior of Surface-Fluorinated Cathode Materials for Lithium Ion Battery

Yonezawa

Kim

Takashima

2015

Advanced Fluoride-Based Materials for Energy Conversion

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supporting

confidence: 76%

Section: Characterization Of Fluorinated Lifepomentioning

confidence: 98%

Electrochemical Behavior of Surface-Fluorinated Cathode Materials for Lithium Ion Battery

Yonezawa

Kim

Takashima

2015

Advanced Fluoride-Based Materials for Energy Conversion

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“…Some researchers [83][84][85][86][87][88] showed that single-ion doping can improve the cycling stability of the spinel with reduced capacity because the dopants are not electrochemically active and do not contribute to the capacity, but this is inconsistent with the following example which gave higher capacity, but not so good cycle performance.…”

Section: Single-ion Dopingmentioning

confidence: 99%

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

et al. 2013

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Spinel LiMn 2 O 4 is an appealing candidate cathode material for Li-ion rechargeable batteries, but it suffers from severe capacity fading, especially at higher temperature (55 °C) during discharging/charging. In recent years, many attempts have been made to synthesize modified LiMn 2 O 4 . This paper reviews the recent research on the preparation and doping modes of doped LiMn 2 O 4 for modifying the LiMn 2 O 4. We firstly compared preparation methods for doped spinel LiMn 2 O 4 , such as solid state reactions and solution synthetic methods. Then we mainly discuss doping modes reported in recent years, such as bulk doping, surface doping and combined doping. A comparison of different doping modes is also provided. The research shows that the multiple-ion doping and combined doping modes of LiMn 2 O 4 used in Li-ion battery are excellent for improving different aspects of the electrochemical performance which holds great promise in the future. From this paper, we also can see that spinel LiMnO 4 as an attractive candidate cathode material for Li-ion batteries.

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“…Fluorine has a large electron capacity 11 and a hydrophilic or hydrophobic reactivity. 21 These redox properties are useful in -F-C-binding with a carbon nanotube, which has a catalytic effect 7 and electron capabilities. 12 The covalent bonds of xC + 1/2F 2 + yHF fi CxHF 2 (HF)(y À 1) fi CxF(HF)y 17 produce the hydrogen bonds of -Cx-(H-F)n-.…”

Section: Introductionmentioning

confidence: 99%

Human-Urine Diabetes Assay and In Vivo Rat Bladder Assay Using a Fluorine-Doped Carbon Nanotube Catheter Sensor

Lee

2009

Ann Biomed Eng

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The creation of a novel biosensor consisting of a fluorine-doped carbon nanotube (FCN) was explored for use in cyclic voltammetric (CV) and square-wave stripping voltammetric (SW) glucose assay. In the experiment that was carried out in this study, analytical optimum conditions were attained at the low detection limit (S/N3) of 0.6 microg/L (3.3 x 10(-9) M). In the 0.1 mg/L spike, the relative standard deviation of 0.607 (n = 15) was obtained. This was used for the diagnosis of the urine of patients with diabetes. Moreover, the catheter-type electrode (CE) can be inserted into a rat bladder through the rat's organs. Thus, it can be connected with an electrochemical analyzer that can be fitted with an interface for the real-time in vivo analysis of metabolic glucose. The developed system can be used for organ treatment, biological analysis, and in vivo control.

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Surface fluorination of the cathode active materials for lithium secondary battery

Cited by 37 publications

References 13 publications

Electrochemical Behavior of Surface-Fluorinated Cathode Materials for Lithium Ion Battery

Electrochemical Behavior of Surface-Fluorinated Cathode Materials for Lithium Ion Battery

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

Human-Urine Diabetes Assay and In Vivo Rat Bladder Assay Using a Fluorine-Doped Carbon Nanotube Catheter Sensor

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