Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries

Hong, Sukhyun; Jo, Hyuntak; Song, Seung‐Wan

doi:10.33961/jecst.2015.6.4.116

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…The presence of Mg 2 Sn even after cycling, despite the fact that cycling ended in the discharged (demagnesiated) state, indicates that the inserted Mg 2+ is not fully extracted even after discharge to 0.6 V, but remains at the surface of the Sn electrode, and thus reflects irreversibility of the reaction. This is similar to the Li‐trapping phenomenon of Sn anode material in Li‐ion batteries . Also newly observed is the presence of a relatively low concentration of SnCl 2 at 487.2 eV, which is confirmed by the presence of a corresponding signal in the Cl 2p spectrum (Figure b).…”

Section: Resultssupporting

confidence: 77%

“…The resultant Mg 2+ diffusivity is 2.9×10 −11 cm 2 s −1 . This is four orders of magnitude lower than the Li + diffusivity of 10 −7 cm 2 s −1 for an Sn–Ni film model electrode and bulk Sn electrode in the ethylene‐carbonate‐based electrolyte of Li cells. Such sluggish diffusion kinetics of Mg 2+ ions compared to Li + might be due to the diffusion of the bivalent and larger Mg 2+ ion, and thus stronger electrostatic interaction between Mg 2+ ions and the Sn lattice, and the formation of Mg x Sn, which has low electronic conductivity.…”

Section: Resultsmentioning

confidence: 75%

“…The diffusion process in this case may include diffusion of Mg 2+ to the surface film to Sn. The slope of I p versus ν 1/2 was used to determine the diffusivity of magnesium by using the Randles–Sevcik equation . The resultant Mg 2+ diffusivity is 2.9×10 −11 cm 2 s −1 .…”

Section: Resultsmentioning

confidence: 99%

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Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

et al. 2016

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Electrochemical cycling performance of microsize bulk and thin film Sn electrodes up to 50 cycles in Mg half‐cell configuration, as well as Mg diffusivity and interfacial reaction behavior in a phenylmagnesium chloride (PhMgCl)/THF electrolyte are studied. The bulk Sn electrode delivers capacities of 321–289 mAh g−1 with capacity retention of 90 % and coulombic efficiencies higher than 99 % over 30 cycles, and thus demonstrates the potential of Sn anodes. The Sn film electrode shows good cycling ability. Surface analysis by XPS reveals that the surface of cycled electrodes is composed of a mixture of various inorganic salts of Sn and Mg formed by interfacial reactions between Sn and PhMgCl, and organic functionality produced by decomposition of THF, indicating surface film formation. The Mg2+ diffusivity of Sn is on the order of 10−11 cm2 s−1, which is four orders of magnitude lower than the Li+ diffusivity of Sn in Li‐ion batteries. Advanced material design for enhanced electronic conductivity and control of the interfacial chemistry for formation of a surface protective film are believed to be the keys to overcome such sluggish kinetics, increase the capacity, and improve the cycling performance.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 75%

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Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

et al. 2016

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“…By the calculated data listed in Figure S3 and Table S5, Δ G barrier is 0.447 eV. The predicted lithium diffusivity is 3.08 × 10 –9 cm 2 ·s –1 , which is equivalent to the tin–nickel film cathodes and Li 2 MnO 3 indicating the superior diffusion capabilities of lithium in the quinone-pillared 2D-MnO 2 cathodes. Some special lithium migration routes are also explored, as shown in Figure b–d.…”

Section: Resultsmentioning

confidence: 86%

Toward Large-Capacity and High-Stability Lithium Storages via Constructing Quinone–2D-MnO₂-Pillared Structures

2021

J. Phys. Chem. C

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Due to wide applications of lithium-ion batteries (LIBs), scientists have never stopped pursuing larger-capacity and higher-stability lithium storage materials. To obtain better LIBs, three distinct quinone−two-dimensional (2D) MnO 2 -pillared structures, i.e., p-benzoquinone (C 6 H 4 O 2 )-2D-MnO 2 , tetrafluoro-p-benzoquinone (C 6 F 4 O 2 )-2D-MnO 2 , and tetrachloro-p-benzoquinone (C 6 Cl 4 O 2 )-2D-MnO 2 were designed and density functional theory calculations were employed to investigate their performance in lithium storages. The calculated theoretical capacities of C 6 H 4 O 2 -2D-MnO 2 , C 6 F 4 O 2 -2D-MnO 2 , and C 6 Cl 4 O 2 -2D-MnO 2 are 588, 564, and 542 mAh/g, respectively, which are all 2 times larger than that of the mesoporous MnO 2 . The electrochemical properties are estimated by the open-circuit voltages, which are calculated from the energies of various lithium concentrations in pillared structures. The voltage data show that the three pillared structures possess excellent characteristics for large-capacity lithium storages. Considering that lithium mobility is vital for cycling performance, the lithium diffusion paths and their energy barriers are computed. The thermal stabilities of three pristine and fully lithium-embedded systems were identified through ab initio molecular dynamics simulations at 300 K. Taken together, these results suggest that quinone−2D-MnO 2 -pillared structures could be prospective materials for larger and more stable lithium storages. Furthermore, our research confirms the possibility of improving lithium storages by pillar construction and provides a prospect for layered material ameliorations.

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“…Sn is the one of the promising candidates of negative electrode materials based on its alloying reaction with Li because Sn offers a large specific capacity (960 mAh/g for Li 17 Sn 4 ) and volumetric capacity (6,970 mAh/cc) compared with carbonaceous materials such as graphite (372 mAh/g and 818 mAh/cc), which is the most frequently used negative electrode material in commercial lithium-ion batteries. However, it is widely known that the high-capacity materials that can alloy with lithium ions during cycling have poor cyclability because the Sn-based electrodes undergo severe volume change upon Li + ion insertion/ extraction from the active materials [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performances of the Sn-Cu Alloy Negative Electrode Materials through Simple Chemical Reduction Method

Kim

Chae

et al. 2019

J. Electrochem. Sci. Technol

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Sn-Cu alloy powders were prepared via a simple chemical reduction method for the negative electrode materials in lithiumion batteries. The addition of Cu can suppress the growth of Sn particles during synthetic process. Furthermore, the Cu also acts as a matrix phase against the volume change during cycling. With increasing amount of the Cu, a stable Cu 6 Sn 5 phase formed in the Sn-Cu alloy and its cycle performance greatly enhanced depending on the Cu content. To promote the generation of the Cu 6 Sn 5 phase, the synthesis temperature is raised to 60-100 o C from the ambient temperature. The Sn-Cu alloy powders prepared at elevated temperatures showed remarkable cycle performances. The Sn-Cu alloy powder obtained at 60 o C exhibited a significantly high volumetric capacity of over 2,000 mAh/cc at the 50th cycle.

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Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries

Cited by 4 publications

References 25 publications

Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

Toward Large-Capacity and High-Stability Lithium Storages via Constructing Quinone–2D-MnO₂-Pillared Structures

Electrochemical Performances of the Sn-Cu Alloy Negative Electrode Materials through Simple Chemical Reduction Method

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Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries

Cited by 4 publications

References 25 publications

Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

Magnesium Storage Performance and Surface Film Formation Behavior of Tin Anode Material

Toward Large-Capacity and High-Stability Lithium Storages via Constructing Quinone–2D-MnO2-Pillared Structures

Electrochemical Performances of the Sn-Cu Alloy Negative Electrode Materials through Simple Chemical Reduction Method

Contact Info

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Toward Large-Capacity and High-Stability Lithium Storages via Constructing Quinone–2D-MnO₂-Pillared Structures