Characterization and electrochemical investigation of boron-doped mesocarbon microbead anode materials for lithium ion batteries

Chen, Maohui; Wu, GT; Zhu, Guangyu; You, Jin‐Hai; Lin, ZG; 林祖赓,

doi:10.1007/s100080100244

Cited by 30 publications

(13 citation statements)

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“…Among the new materials studied, multi-walled carbon nanotubes (MWNTs) are of special interest since they combine structural features of graphite and fullerenes and open up different ways of intercalation with foreign atoms and molecules [5][6][7]. Recent research on carbon nanotubes used as anode material for lithium-ion batteries has shown that the electrochemical intercalation/ de-intercalation of lithium into/from this unique material is reversible and promising [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A non-GIC mechanism of lithium storage in chemical etched MWNTs

Cao

Zhao

2004

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

A non-GIC mechanism of lithium storage in chemical etched MWNTs

Cao

Zhao

2004

Journal of Electroanalytical Chemistry

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“…TiN-C nanoparticles were synthesized using TiCl 4 and NaN 3 reactants in supercritical benzene medium that also serves as a carbon source and, afterward, applies heat treatment under NH 3 and N 2 atmospheres. The evolutions of carbon phase during supercritical process and following heat treatments were studied extensively.…”

Section: Resultsmentioning

confidence: 99%

“…However, their poor rate capability and cycling performance, because of failure of carbon structure, cannot meet the upward requirements for high-performance LIBs [2,3]. Recently, there have been tremendous e orts to improve carbonaceous anodes performance by doping various elements as conducting agent or decreasing crystallite size and increasing pore structure [3,4]. Using active-inactive composites as a mixedconductive matrix, which electrically isolates the active particles from the current collector, is one of the solutions to improve the anode performance.…”

Section: Introductionmentioning

confidence: 99%

Investigation of carbon phase evolutions in titanium nitride-carbon nanocomposites prepared in supercritical benzene with respect to their lithium storage capacity

et al. 2017

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Abstract. Titanium nitride-carbon nanocomposites have been synthesized by the reaction of TiCl 4 and NaN 3 in supercritical benzene medium that also serves as a carbon source. The as-prepared precursor has been subjected to di erent heat treatments under ammonia and nitrogen atmospheres. The structure and chemical composition of the synthesized TiN-C nanocomposites are studied by X-Ray Di raction (XRD) and CHN elemental analysis. Meanwhile, the nature of carbonaceous species and the respective carbon phase transitions during supercritical process and following heat treatments are further investigated by Raman spectroscopy, Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS), and their charge-discharge characteristics with respect to lithium storage. After 10 h of NH3 treatment at 1000 C, carbonaceous phase transforms to graphene layered structure. The highly e cient mixed TiN conducting network and the internal defects between G layers induced by nitrogen doping improve rate capability and cycling performance of G sheets and provide a speci c capacity of 381 mAh g 1 at Charge/Discharge (C/D) rate of 0.2 C. The enhanced electrochemical performance of the SIV nanocomposite is mainly due to improving the electronic/ionic conductivity, reducing charge transfer coe cient, and increasing electrochemical surface area that are resulted from anchoring of TiN nanoparticles to graphene sheets.

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“…The impact of choosing longer or shorter relaxation durations and their position in a complete cycle (i.e., whether to relax before or after discharge) over cell performance is also unclear. By conducting a parametric study on relaxation ('resting') effect for O (10 3 ) cycles for Li-ion cells, we intend to fulfill the following objectives in this work:…”

Section: A3146mentioning

confidence: 99%

Effect of Relaxation Periods over Cycling Performance of a Li-Ion Battery

Rashid

Gupta

2015

J. Electrochem. Soc.

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Various operational parameters such as charge/discharge rates, relaxation periods, and depth of charge and discharge play an important role in enhancing the cycling life of Li-ion batteries. Providing batteries with a relaxation period after discharging and charging might be essential for removing concentration gradients generated due to passage of current. In the present work, the effect of providing open-circuit time durations after completion of each charge and discharge over the performance of Li-ion cells has been analyzed and quantified. It is shown that relaxing the cell after discharge has significant influence over cell performance, whereas relaxation after charge has a marginal effect. In the former case, a relatively thicker film forms at the solid-electrolyte interface in the negative electrode. Moreover, providing a sufficiently long relaxation to the cell at the end of discharge results in (a) a higher concentration of lithium in the solid matrix of the negative electrode and (b) a lower concentration of lithium in the positive electrode, both leading to a higher cell potential during the discharge phase of the subsequent cycle. Charging the cell following a relaxation period of more than one hour at the end of discharge results in a better utilization of cyclable lithium. Diminishing fossil fuel reserves have made it imperative to develop alternative energy sources to power automotive vehicles. Many researchers have focused their attention toward sources such as biomass, solar, wind, fuel cells and batteries [1][2][3] to accomplish this requirement. By virtue of their lower fuel consumption, silent operation and zero emissions, battery powered vehicles (such as hybrid and electric) offer a substitute to gasoline-fuelled vehicles. 4 In the last decade, Li-ion batteries (LIBs) have been used extensively as power sources for many small and portable electronic devices such as mobiles, camcorders, PDAs, laptops, digital cameras and other communication devices. However, these portable electronic devices require a very low current. For high power applications, such as electric, hybrid-electric and plug-in hybrid-electric vehicles, a higher current is required. This puts limitations on the use of LIBs as power sources in these scenarios since their capacity decreases rapidly at high discharge rates. 5Several studies have focused their attention toward enhancement of battery performance in terms of energy and power density. In this regard, various combinations of electrode/electrolyte materials have been used with different operational and design parameters to minimize the capacity fading of Li-ion cells.5-9 Mesocarbon Microbead (MCMB) has been used commercially as an anode material due to its high reversible capacity, while it has limitation of film formation at solid electrolyte interface (SEI).10,11 Whereas in common cathode materials, manganese oxide is used as it is abundant, cheaper and environmentally friendly in nature. Moreover, use of manganese oxide as cathode material minimizes safety issues a...

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Characterization and electrochemical investigation of boron-doped mesocarbon microbead anode materials for lithium ion batteries

Cited by 30 publications

References 0 publications

A non-GIC mechanism of lithium storage in chemical etched MWNTs

A non-GIC mechanism of lithium storage in chemical etched MWNTs

Investigation of carbon phase evolutions in titanium nitride-carbon nanocomposites prepared in supercritical benzene with respect to their lithium storage capacity

Effect of Relaxation Periods over Cycling Performance of a Li-Ion Battery

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