Double-buffer-phase embedded Si/TiSi2/Li2SiO3 nanocomposite lithium storage materials by phase-selective reaction of SiO with metal hydrides

Jeong, Won Joon; Chung, Dong Jae; Youn, Donghan; Kim, Nam Gyu; Kim, Hansu

doi:10.1016/j.ensm.2022.06.023

Cited by 20 publications

(12 citation statements)

References 47 publications

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“…41 In the medium-frequency region, the R ct values of Si 1/4 TiAl 0.24 , Si 1/4 TiAl 0.36 , and Si 1/4 TiAl 0.48 are 107.7, 76.64, and 102.7 Ω, respectively, demonstrating that the increase in specific surface area improves the charge transfer kinetics. 36,42 Figure 4c illustrates the cyclic stability of the Si/Si-Ti anode at a current density of 500 mA g −1 (the first cycle is activated at a current density of 100 mA g −1 ). After 100 cycles, the discharge capacities for Si 1/4 TiAl 0.24 , Si 1/4 TiAl 0.36 , and Si 1/4 TiAl 0.48 remained at 685, 1112, and 992 mAh g −1 , respectively, corresponding to capacity retentions of approximately 50.7, 86.7, and 96.9%.…”

Section: Resultsmentioning

confidence: 99%

Scalable Synthesis of a Porous Micro Si/Si-Ti Alloy Anode for Lithium-Ion Battery from Recovery of Titanium-Blast Furnace Slag

Liu,

Zhong,

Zeng

et al. 2023

ACS Appl. Mater. Interfaces

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The extensive utilization of Si-anode-based lithium-ion batteries faces obstacles due to their substantial volume expansion, limited intrinsic conductivity, and low initial Coulombic efficiency (ICE). In this study, we present a straightforward, cost-effective, yet scalable method for producing a porous micro Si/Si-Ti alloy anode. This method utilizes titanium-blast furnace slag (TBFS) as a raw material and combines aluminothermic reduction with acid etching. By adjusting the Al:TBFS ratio, the specific surface area of the material can be facilely tailored, ranging from 25.89 to 43.23 m 2 g −1 , enhancing the ICE from 78.2 to 85.5%. The incorporation of the Si-Ti alloy skeleton and porous structure contributes to the enhanced cyclic stability (capacity retention from 50.7 to 96.9%) and conductivity (R ct from 107.7 to 76.6 Ω). The Si/Si-Ti anode exhibits excellent electrochemical performance, including delivering a specific capacity of 1161 mAh g −1 at 200 mA g −1 after 200 cycles and 1112 mAh g −1 at 500 mA g −1 after 100 cycles, with an improved ICE of 81.2%. This study introduces a successful methodology for designing novel Si anodes from recycling waste materials, providing valuable insights for future advancements in this area.

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Section: Resultsmentioning

confidence: 99%

Scalable Synthesis of a Porous Micro Si/Si-Ti Alloy Anode for Lithium-Ion Battery from Recovery of Titanium-Blast Furnace Slag

Liu,

Zhong,

Zeng

et al. 2023

ACS Appl. Mater. Interfaces

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“…[15] When LiH was used for prelithiation of SiO, it played as the source for lithium silicate, resulting in a boost of initial coulombic efficiency to 90.5%. To further improve the long-term cycle life of LiH prelithiated SiO anode, Jeong et al [16] proposed a double-buffer-phase embedded Si/TiSi 2 / Li 2 SiO 3 nanocomposite material prepared by phase-selective reaction of SiO with TiH 2 . In terms of the synthetic process, Yom et al [17] studied the effect of heating rate on metallurgically pre-lithiated SiO active materials.…”

Section: Anode Chemical Prelithiationmentioning

confidence: 99%

“…To further improve the long‐term cycle life of LiH prelithiated SiO anode, Jeong et al. [ 16 ] proposed a double‐buffer‐phase embedded Si/TiSi 2 /Li 2 SiO 3 nanocomposite material prepared by phase‐selective reaction of SiO with TiH 2 . In terms of the synthetic process, Yom et al.…”

Section: Anode Chemical Prelithiationmentioning

confidence: 99%

Prelithiation Enhances Cycling Life of Lithium‐Ion Batteries: A Mini Review

Liu

Wu²,

Xie

et al. 2023

Energy & Environ Materials

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During the last decade, the rapid development of lithium‐ion battery (LIB) energy storage systems has provided significant support for the efficient operation of renewable energy stations. In the coming years, the service life demand of energy storage systems will be further increased to 30 years from the current 20 years on the basis of the equivalent service life of renewable energy stations. However, the life of the present LIB is far from meeting such high demand. Therefore, research on the next‐generation LIB with ultra‐long service life is imminent. Prelithiation technology has been widely studied as an important means to compensate for the initial coulombic efficiency loss and improve the service life of LIBs. This review systematically summarized the different prelithiation methods from anode and cathode electrodes. Moreover, the large‐scale industrialization challenge and the possibility of the existing prelithiation technology are analyzed, based on three key parameters: industry compatibility, prelithiation efficiency, and energy density. Finally, the future trends of improvement in LIB performance by other overlithiated cathode materials are presented, which gives a reference for subsequent research.

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“…Additional references cited within the Supporting Information. [46][47][48][49][50][51][52][53][54][55][56]…”

Section: Supporting Informationmentioning

confidence: 99%

Boosting the Cell Performance of the SiO/Cu and SiO/PPy Anodes via In‐Situ Reduction/Oxidation Coating Strategies

Luo,

Che,

et al. 2023

Chemistry A European J

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Silicon monoxide (SiO) has attracted great attention due to its high theoretical specific capacity as an alternative material for conventional graphite anode, but its poor electrical conductivity and irreversible side reactions at the SiO/electrolyte interface seriously reduce its cycling stability. Here, to overcome the drawbacks, the dicharged SiO anode coated with Cu coating layer is elaborately designed by in‐situ reduction method. Compared with the pristine SiO anode of lithium‐ion battery (293 mAh g−1 at 0.5 A g−1 after 200 cycles), the obtained SiO/Cu composite presents superior cycling stability (1206 mAh g−1 at 0.5 A g−1 after 200 cycles). The tight combination of Cu particles and SiO significantly improves the conductivity of the composite, effectively inhibits the side‐reaction between the active material and electrolyte. In addition, polypyrrole‐coated SiO composites are further prepared by in‐situ oxidation method, which delivers a high reversible specific capacity of 1311 mAh g‐1 at 0.5 A g‐1 after 200 cycles. The in‐situ coating strategies in this work provide a new pathway for the development and practical application of high‐performance silicon‐based anode.

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Double-buffer-phase embedded Si/TiSi2/Li2SiO3 nanocomposite lithium storage materials by phase-selective reaction of SiO with metal hydrides

Cited by 20 publications

References 47 publications

Scalable Synthesis of a Porous Micro Si/Si-Ti Alloy Anode for Lithium-Ion Battery from Recovery of Titanium-Blast Furnace Slag

Scalable Synthesis of a Porous Micro Si/Si-Ti Alloy Anode for Lithium-Ion Battery from Recovery of Titanium-Blast Furnace Slag

Prelithiation Enhances Cycling Life of Lithium‐Ion Batteries: A Mini Review

Boosting the Cell Performance of the SiO/Cu and SiO/PPy Anodes via In‐Situ Reduction/Oxidation Coating Strategies

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