Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications

Nulu, Arunakumari; Nulu, Venugopal; Sohn, Keun Yong

doi:10.1016/j.jallcom.2022.164976

Cited by 16 publications

(10 citation statements)

References 45 publications

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“…In the anodic scan, the two prime peaks at 0.32 V and 0.52 V are attributed to the oxidation process or the two‐step dealloying process of Li + from the Li x Si phase and the formation of the amorphous Si. The peak intensities are increased from the 1 st cycle to the 5 th cycle due to the wetting or activation process of active material [19] . The CV plots of the Si‐CNT‐G‐622 vs. sulfur cathode full cell are shown in Figure 6(b), where the two reduction peaks around 1.95 V and 1.55 V are corresponding to the conversion of elemental sulfur into soluble high‐order lithium polysulfides (Li 2 S x , 4≤x≤8) and soluble polysulfides to lithium sulfides (Li 2 S 2 , Li 2 S).…”

Section: Resultsmentioning

confidence: 99%

“…material. [19] The CV plots of the Si-CNT-G-622 vs. sulfur cathode full cell are shown in Figure 6(b), where the two reduction peaks around 1.95 V and 1.55 V are corresponding to the conversion of elemental sulfur into soluble high-order lithium polysulfides (Li 2 S x , 4 � x � 8) and soluble polysulfides to lithium sulfides (Li 2 S 2 , Li 2 S). The oxidation peak at 2.2 V is ascribed to the transformation process of insoluble low-order lithium sulfides into elemental sulfur.…”

Section: Chemelectrochemmentioning

confidence: 99%

“…But Si anodes face two main drawbacks such as poor intrinsic conductivity and, massive volume change during Li + ion reactions, which lead to the formation of unwanted solid electrolyte interphase (SEI), and make the active material peel off from the current collector, causing a rapid decline in the capacities, resulting in poor performance of the cell. [16][17][18][19] To resolve these issues, different approaches have been studied, such as using different nanostructure Si anodes, conductive additives, carbon composites, binders, etc. [20][21][22][23][24] Different structures of silicon such as nanowires, nanotubes, hollow structures, etc.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integrated Structures of Silicon/CNTs/Graphite Composite as an Advanced Li‐Metal‐Free Anode for Li‐Sulfur Batteries

Nulu

Sohn

2023

ChemElectroChem

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Silicon (Si) is considered an alternative anode material for Li-S batteries considering its high theoretical capacity of 3590 mAh g À 1 at room temperature, and advantageous to avoid unfavorable Li metal anode, which forms dendrites during the cell charging and discharging process causes short circuits.Here in this study, we have prepared a nanocomposite anode comprising Si nanoparticles, multi-walled carbon nanotubes (MCNTs), and graphite (G) by low-temperature annealing approach and studied their electrochemical characteristics by combining with sulfur cathodes into Si-S full cells in ether-based liquid electrolytes. The prepared Si-S battery system exhibits stable electrochemical properties with long cycle life. The fabricated full cell delivered specific capacities of 328 mAh g À 1 at 0.1 C, and 243 mAh g À 1 at 0.5 C, with calculated energy densities of 542 and 473 Wh kg À 1 , respectively, without any cell failure. These results indicate that the integration of Si, MCNTs, and G is a promising approach to avoiding Li-metal anodes and achieving high and stable capacities for Li-S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Chemelectrochemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integrated Structures of Silicon/CNTs/Graphite Composite as an Advanced Li‐Metal‐Free Anode for Li‐Sulfur Batteries

Nulu

Sohn

2023

ChemElectroChem

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“…Research shows that 0.5% Mn-doped silicon nanoparticles, as well as 0.5% Ni-doped nanoparticle anodes, accomplished impressive capacities, which are 2324 mAh g -1 and 2561 mAh g -1 , respectively. In addition, they also show great cycling ability that can maintain 88% and 86% capacity after 100 cycles [22]. The better mechanical properties of transition metals strengthen silicon nanoparticles and mitigate volume expansions.…”

Section: Siliconmentioning

confidence: 99%

Applications of Nanotechnology: lithium-ion based batteries in electric vehicles

Zhao¹

2023

HSET

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With the benefit of zero emissions, free noise and stable operation, the electrical vehicle market has grown dramatically. More expectations are raised for electric vehicles to achieve a better user experience of long-range, long-lifespan and time-saving charging. Thus the capacity, cycling ability and rate capability of electric vehicle batteries are aimed to be improved. Since the advent of nanotechnology, it has made great contributions to various industries and is also believed to be a breakthrough in battery performance. This article introduced nanotechnologies, summarised and discussed its application that could improve lithium-ion-based electric vehicle battery performance. Three typical commercialised cathode materials (Lithium Manganese Oxide (LMO), Lithium Nickel Manganese Cobalt Oxide (NMC), and Lithium Nickel Cobalt Aluminium Oxide (NCA)) suffer capacity fading due to lattice distortion, ion dissolution, and electrolyte decomposition, which can be mitigated by nano-doping, nanocoating, and special nanostructure to certain extents. Two promising anode materials (Lithium titanate (LTO) and silicon) face problems of poor electrical conductivity and volumetric expansion during cycling. Nanotechnologies provide solutions that greatly accelerate their commercialisation. In the future, quantitative composition manipulation is the key point to further promoting cathode material performance. And anode materials still need to be improved to be genuinely used in life. This article combines nanotechnology with the electric vehicle industry and provides innovative ideas for their development.

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“…In our previous work, the influence of metal doping on Si NPs was studied, where low doping concentrations of transition metals (Mn, Ni) were used to dope into Si nanoparticles [ 47 ]. However, the usage of Si NPs (commercially purchased) increases the production cost, which is a drawback for industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Metal (Cu/Fe/Mn)-Doped Silicon/Graphite Composite as a Cost-Effective Anode for Li-Ion Batteries

et al. 2022

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Silicon is a worthy substitute anode material for lithium-ion batteries because it offers high theoretical capacity and low working potentials vs. Li+/Li. However, immense volume changes and the low intrinsic conductivity of Si hampers its practical applications. In this study, nano/micro silicon particles are achieved by ball milling silicon mesh powder as a scalable process. Subsequent metal (Cu/Fe/Mn) doping into nano/micro silicon by low-temperature annealing, followed by high-temperature annealing with graphite, gives a metal-doped silicon/graphite composite. The obtained composites were studied as anodes for Li-ion batteries, and they delivered high reversible capacities of more than 1000 mAh g−1 with improved Li+ diffusion properties. The full cells from these composite anodes vs. LiCoO2 cathodes delivered suitable energy densities for Li+ storage applications. The enhanced electrochemical properties are accredited to the synergistic effect of metal doping and graphite addition to silicon and exhibit potential for suitable Li+ energy storage applications.

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Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications

Cited by 16 publications

References 45 publications

Integrated Structures of Silicon/CNTs/Graphite Composite as an Advanced Li‐Metal‐Free Anode for Li‐Sulfur Batteries

Integrated Structures of Silicon/CNTs/Graphite Composite as an Advanced Li‐Metal‐Free Anode for Li‐Sulfur Batteries

Applications of Nanotechnology: lithium-ion based batteries in electric vehicles

Metal (Cu/Fe/Mn)-Doped Silicon/Graphite Composite as a Cost-Effective Anode for Li-Ion Batteries

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