Fabrication of F-doped, C-coated NiCo2O4 nanocomposites and its electrochemical performances for lithium-ion batteries

Wu, Xianwen; Li, Yehua; Zhao, Shenyong; Zeng, Fanghong; Peng, Xiaochun; Xiang, Yanhong; Ruan, Qiaoyun; Gao, Feng; He, Ting; Wu, Jianhua

doi:10.1016/j.ssi.2019.01.039

Cited by 52 publications

(21 citation statements)

References 41 publications

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“…This result indicates that a stable and robust SEI could be formed by the addition of PS, which inhibits further electrolyte decomposition and protects the graphite effectively from exfoliation. The development of sulfur-containing interfaces may allow for the use of electrolytes that are otherwise structural unstable anode materials, such as the Si-based and oxide anode (Wu et al, 2019;Fang et al, 2020). Figure 7 reveals the SEM and TEM images of the p.ristine LiMn 2 O 4 and the cathodes cycled with and without PS after 180 cycles.…”

Section: Resultsmentioning

confidence: 99%

Improving Cyclic Stability of LiMn2O4/Graphite Battery Under Elevated Temperature by Using 1, 3-Propane Sultone as Electrolyte Additive

Liu

et al. 2020

Front. Mater.

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Spinel lithium manganese oxide (LiMn 2 O 4) based Li-ion battery (LIB) is attractive for hybrid/full electric vehicles because of its abundant resources and easy preparation. However, operation under an elevated temperature could cause severe capacity fading of the spinel cathodes. In this work, 1, 3-propane sultone (PS) is investigated as an electrolyte additive for improving the cyclability of the LiMn 2 O 4 /graphite LIB at elevated temperature. The charge and discharge measurement proves that PS can significantly enhance the cyclability of 053048-type LiMn 2 O 4 /graphite pouch cell at 60 • C. Compared to the cell without additive, the capacity retention of the cell using electrolyte with 5% PS increases from 52 to 71% after 180 cycles. The improved cyclability is attributable to the modification of the solid electrolyte interface (SEI) on both positive and negative sides of the LiMn 2 O 4 /graphite cell by PS, which effectively prevents anode and cathode from structural breakdown and inhibits the electrolyte decomposition.

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Section: Resultsmentioning

confidence: 99%

Improving Cyclic Stability of LiMn2O4/Graphite Battery Under Elevated Temperature by Using 1, 3-Propane Sultone as Electrolyte Additive

Liu

et al. 2020

Front. Mater.

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“…Furthermore, the cell with the AMLA shows the lower resistance after 30 times' cycles (Figures 3d,e). The resistance is consisted of the ohmic resistance (R b ), interfacial resistance of the electrode (R i ), and diffusion impedance of lithium ions in solids (Z w ) (Wu et al, 2019; Zhou et al, 2019). In the symmetrical cells, the most important resistance is the Ri, because the R b (4 Ω) and the Z w (the slop of the sloping line at the low frequency region are the same) are the same in different electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…In the symmetrical cells, the most important resistance is the Ri, because the R b (4 Ω) and the Z w (the slop of the sloping line at the low frequency region are the same) are the same in different electrodes. As for the AMLA, there are two semicircles in the high frequency region of the EIS curve, due to the mixing layer of LiNO 3 and Ag: the first one represents the lithium ion transfer impedance (R p ) and the second one represents the charge transfer impedance (R ct ) (Wu et al, 2019). Therefore, the R i of the AMLA is consisted of R p and R ct .…”

Section: Resultsmentioning

confidence: 99%

Toward High-Performance Li Metal Anode via Difunctional Protecting Layer

Shen

Fang

et al. 2019

Front. Chem.

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Li-metal batteries are the preferred candidates for the next-generation energy storage, due to the lowest electrode potential and high capacity of Li anode. However, the dangerous Li dendrites and serious interface reaction hinder its practical application. In this work, we construct a difunctional protecting layer on the surface of the Li anode (the AgNO 3 -modified Li anode, AMLA) for Li-S batteries. This stable protecting layer can hinder the corrosion reaction with intermediate polysulfides (Li 2 S x , 4 ≤ x ≤ 8) and suppress the Li dendrites by regulating Li metal nucleation and depositing Li under the layer uniformly. The AMLA can cycle more than 50 h at 5 mA cm −2 with the steady overpotential of lower than 0.2 V and show high capacity of 666.7 mAh g −1 even after 500 cycles at 0.8375 mA cm −2 in Li-S cell. This work makes great contribution to the protection of the Li anode and further promotes the practical application.

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“…The curves consist of a semicircle and a straight line. The semicircle in the high and medium frequency can be explained as the charge transfer resistance (R ct ) and double layer capacitance (C dl ), and the straight line in the low frequency was a representation of the Warburg impedance Z w (Wu et al, 2019). By comparing the two curves, it was found that the traditional LLOs electrode has higher interfacial impedance compared with the LLOs/CNTs/NFCs electrode.…”

Section: Resultsmentioning

confidence: 99%

Flexible Li[Li0.2Ni0.13Co0.13Mn0.54]O2/Carbon Nanotubes/Nanofibrillated Celluloses Composite Electrode for High-Performance Lithium-Ion Battery

Zhang

Xiao

et al. 2019

Front. Chem.

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Rapidly-growing demand for wearable and flexible devices is boosting the development of flexible lithium ion batteries (LIBs). The exploitation of flexible electrodes with high mechanical properties and superior electrochemical performances has been a key challenge for the rapid practical application of flexible LIBs. Herein, a flexible composite electrode was prepared from the mixed solutions of Li[Li 0.2 Ni 0.13 Co 0.13 Mn 0.54 ]O 2 (LLOs), carbon nanotubes(CNTs), and nanofibrillated celluloses (NFCs) via a vacuum filtration method. The resulting LLOs/CNTs/NFCs electrode delivered an initial discharge capacity of 253 mAh g −1 at 0.1 C in the voltage range from 2.0 to 4.6 V, and retained a reversible capacity of 178 mAh g −1 with 83% capacity retention after 100 cycles at 1 C. The LLOs/CNTs/NFCs electrode exhibited excellent flexibility along with repeated bending in the bending test. The LLOs/CNTs/NFCs electrode after bending test remained a discharge capacity of 149 mAh g −1 after 100 cycles at 1 C, and the corresponding capacity retentions was 76%. The excellent electrochemical performance and high flexibility can be ascribed to the framework formed by CNTs with high conductivity and NFCs with good mechanical properties. The results imply that the as-fabricated electrode can be a promising candidate for the flexible LIBs.

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Fabrication of F-doped, C-coated NiCo2O4 nanocomposites and its electrochemical performances for lithium-ion batteries

Cited by 52 publications

References 41 publications

Improving Cyclic Stability of LiMn2O4/Graphite Battery Under Elevated Temperature by Using 1, 3-Propane Sultone as Electrolyte Additive

Improving Cyclic Stability of LiMn2O4/Graphite Battery Under Elevated Temperature by Using 1, 3-Propane Sultone as Electrolyte Additive

Toward High-Performance Li Metal Anode via Difunctional Protecting Layer

Flexible Li[Li0.2Ni0.13Co0.13Mn0.54]O2/Carbon Nanotubes/Nanofibrillated Celluloses Composite Electrode for High-Performance Lithium-Ion Battery

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