Enhanced rate performance of carbon-coated LiNi0.5Mn1.5O4 cathode material for lithium ion batteries

Yang, Tao; Zhang, Naiqing; Lang, Ye; Sun, Kening

doi:10.1016/j.electacta.2010.12.109

Cited by 188 publications

(90 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the HM LNMO cathodes were multistacked in series (65 µm (= 1 sheet), 220 µm (= 4 sheets), 420 µm (= 8 sheets), Figure S18, Supporting Information), thus contributing to the areal capacity (= capacity per cathode area) in proportional to their thickness (Figure 4 e), notably which were far higher than those reported in the previous studies. [ 15,16,56,57 ] Adv. Energy Mater.…”

Section: B)mentioning

confidence: 98%

1D Building Blocks‐Intermingled Heteronanomats as a Platform Architecture For High‐Performance Ultrahigh‐Capacity Lithium‐Ion Battery Cathodes

Kim

Park

et al. 2015

Advanced Energy Materials

View full text Add to dashboard Cite

binder-/conductive powder-/current collector-free electrodes, a number of approaches have been reported, which are largely classifi ed: (i) self-standing carbon nanofi bers (or carbon nanotubes (CNTs)) sheets containing electrode active materials, including CNTs/LiNi 0.5 Mn 1.5 O 4 electrodes prepared by vacuum fi ltration process, [ 15,16 ] CNTs/Fe 3 O 4 composite electrodes via polyacrylic acid-assisted assembly, [ 17 ] CNTs/Li 4 Ti 5 O 12 composite electrodes fabricated through aerosol spray process, [ 18,19 ] CNTs/ conducting polymer hydrogel network electrodes, [ 20 ] (ii) coating or impregnation of electrode active materials into preformed electroconductive porous scaffolds made of graphite form, [ 21,22 ] carbon textile, [ 23 ] and carbon cloth. [ 24,25 ] These previous works showed some meaningful results, however, most of them still suffered from the limitations in mass loading of electrode active materials, structural integrity, mechanical fl exibility, and manufacturing processability.Here, as a facile and versatile electrode strategy to resolve the long-standing challenges of conventional electrodes mentioned above, we demonstrate a new class of heteronanomatarchitectured electrodes (referred to as HM electrodes), which comprise 1D nanobuilding blocks of polyacrylonitrile (PAN) nanofi bers/multi-walled carbon nanotubes (MWNTs)-mediated heteronanomat and densely packed electrode active particles. The HM electrodes are fabricated through simultaneous electrospraying (for MWNTs/electrode active powders) and electrospinning process (for PAN nanofi bers) without the use of typical polymer binders, carbon powder conductive additives, and metallic foil current collectors. Notably, the electrosprayed MWNTs and electrospun PAN nanofi bers are intermingled in close contact with the electrode active particles, eventually leading to electrode active particles-embedded self-standing heteronanomat electrodes. The PAN nanofi bers act as a mechanically reinforcing building element and also 1D-shaped electrode binders. The MWNTs build well-interconnected electronic networks and also play a role as an alternative current collector. [ 26 ] In lithium-ion batteries, the fabrication approach based on the combined electrospraying/electrospinning was already reported for the preparation of silicone/carbon fi ber paper electrodes [ 27 ] and nanoparticle-on-nanofi ber hybrid membrane battery separators. [ 28 ] Intrigued by the uniqueness of this process concept, we modifi ed the simultaneous electrospraying/electrospinning technique with an aim to produce the aforementioned HM electrodes featuring the exceptional structure and electrochemical performance.Such uniqueness in the materials/architecture of the HM electrodes is anticipated to enable substantial improvements in the electrochemical performance and mechanical fl exibility far beyond those accessible with conventional electrode Ever-increasing demand for high-performance portable electronics, electric vehicles (EVs) and grid-scale energy storage systems (ESSs) has res...

show abstract

Section: B)mentioning

confidence: 98%

1D Building Blocks‐Intermingled Heteronanomats as a Platform Architecture For High‐Performance Ultrahigh‐Capacity Lithium‐Ion Battery Cathodes

Kim

Park

et al. 2015

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…Due to the insufficient knowledge on the conduction mechanism and the uncertainty in the involvement of such layers in the electrode process, a phenomenological approach is usually applied to account for the behaviour of these layers. Namely, a parallel RC sub-circuit is added to the [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] in an overwhelming majority. Another concept is applied by Lewandowski and coworkers [35,36] who prefer an R EL -Z W -{C SEI ║ (R SEI (C DL ║R CT ))} type equivalent circuit, which exhibits time constants in the same number as the circuits shown in Figs.…”

Section: Electrochemical Impedance Spectroscopy (Eis) Is a Well-estabmentioning

confidence: 99%

A systematic approach to the impedance of surface layers with mixed conductivity forming on electrodes

Péter

2013

J Solid State Electrochem

View full text Add to dashboard Cite

-Electrode impedance can be evaluated on the basis of the electrode reaction kinetics in many systems, even for complicated electrode reactions. However, when a surface layer is present on the electrode surface, the theoretically well-established impedance model of the electrode reaction is often completed with phenomenological equivalent circuit elements in order to achieve the number of time constants as derived from the electrode impedance spectra measured In these cases, the meaning of the phenomenological equivalent circuit elements are often unclear, though the presence of these elements is helpful to describe the system throughout the frequency domain used for the measurement. In the present work, an attempt will be shown to separate the effect of the electronic and ionic charge transfer in a surface layer and to identify the appropriate equivalent circuits. Examples are shown from the fields of lithium-ion batteries where a solid electrolyte interface as a surface layer is present at the negative electrode and the contribution of various charge carriers may be of importance.2

show abstract

“…5.0 V versus lithium. Compared to another 5 V spinel, LiNi 0.5 Mn 1.5 O 4 which has been investigated extensively (Li et al, 2007;Santhanam and Rambabu, 2010;Yang et al, 2011;Zhong et al, 2011;Cabana et al, 2012;Mao et al, 2012;Liu et al, 2012), LiCoMnO 4 is relatively new material. LiNi 0.5 Mn 1.5 O 4 is usually charged to cutoff voltages of 4.9-5.0 V Shin et al, 2012;Yi and Hu, 2007;Huang et al, 2011) while LiCoMnO 4 has to be charged to 5.3 V due to its two charging plateaus at 5.2 and 4.9 V (Kawai et al, 1999;1998;Huang et al, 2012;Hu et al, 2013;Kuwata et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Preparation of LiCoMnO<sub>4</sub> Assisted by Hydrothermal Approach and its Electrochemical Performance

You¹,

Huang²,

Lin³

et al. 2016

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

LiCoMnO 4 materials have been synthesized via a hydrothermal approach followed by a post-annealing process. Pure phase of LiCoMnO 4 is unable to form under hydrothermal conditions; however, high quality of pure LiCoMnO 4 was achieved after annealing the hydrothermal products. The concentration of LiOH and the post-annealing temperature are the crucial factors to form LiCoMnO 4 . Without post-annealing process, the highest contents of LiCoMnO 4 in the hydrothermal products are less than 50% (e.g., in the presence of 1.2-1.35 M LiOH); in contrast, in the cases of 1.35-1.4 M LiOH, almost pure phase of LiCoMnO 4 has been achieved successfully after annealing the hydrothermal precursors at 750°C. The asprepared sample in the presence of 1.35 M LiOH, after annealed at 750°C, exhibits a capacity of 91.6 mAh g −1 .

show abstract

Enhanced rate performance of carbon-coated LiNi0.5Mn1.5O4 cathode material for lithium ion batteries

Cited by 188 publications

References 25 publications

1D Building Blocks‐Intermingled Heteronanomats as a Platform Architecture For High‐Performance Ultrahigh‐Capacity Lithium‐Ion Battery Cathodes

1D Building Blocks‐Intermingled Heteronanomats as a Platform Architecture For High‐Performance Ultrahigh‐Capacity Lithium‐Ion Battery Cathodes

A systematic approach to the impedance of surface layers with mixed conductivity forming on electrodes

Preparation of LiCoMnO<sub>4</sub> Assisted by Hydrothermal Approach and its Electrochemical Performance

Contact Info

Product

Resources

About