Highly reversible conversion reaction in Sn2Fe@SiOx nanocomposite: A high initial Coulombic efficiency and long lifetime anode for lithium storage

Zhang, Hanyin; Liu, Yuxuan; Cheng, Xin; Liu, Jiangwen; Lu, Zhijiang; Zeng, Meiqin; Yang, Lichun; Liu, Jun; Zhu, Min

doi:10.1016/j.ensm.2018.02.001

Cited by 35 publications

(22 citation statements)

References 44 publications

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“…This result agreed well with our previous work that Sn-M (M = Fe, Mn, Cu, Co) intermetallic promoted the reconversion of Li-Sn-O. [28] Figure 5c shows the dQ/dV curves of the SiO, SiO-Sn-Co, and SiO-Sn-Co/G electrodes. During charging, the SiO peaks weakened gradually, whereas those of the SiO-Sn-Co and SiO-Sn-Co/G almost coincided.…”

Section: Resultssupporting

confidence: 92%

“…In our previous work, insightful research was carried out on SnO 2 -based anodes, which provided an opportunity to overcome the inferior reversibility of Li 2 O in SiO anode with transition metals. [26,27] Zhang et al [28] fabricated Sn 2 Fe@SiO x anodes with an excellent cycling stability and clarified that multi-phase composites have a complicated phase interface and structure evolution that determine the structural stability and Li + diffusion kinetics, which provide support to manufacture SiO-M-Sn composites.…”

Section: Introductionmentioning

confidence: 99%

“…[ 26,27 ] Zhang et al. [ 28 ] fabricated Sn 2 Fe@SiO x anodes with an excellent cycling stability and clarified that multi‐phase composites have a complicated phase interface and structure evolution that determine the structural stability and Li + diffusion kinetics, which provide support to manufacture SiO–M–Sn composites.…”

Section: Introductionmentioning

confidence: 99%

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Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li‐Ion Batteries

Zhang

Lan

2021

Energy & Environ Materials

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Silicon monoxide (SiO) has aroused increased attention as one of the most promising anodes for high‐energy density Li‐ion batteries. To enhance the initial Coulombic efficiencies (ICE) and cycle stability of SiO‐based anodes, a new facile composition and electrode design strategy have been adapted to fabricate a SiO–Sn–Co/graphite (G) anode. It achieves a unique structure where tiny milled SiO–Sn–Co particles are dispersed among two graphite layers. In this hybrid electrode, Sn–Co alloys promoted Li+ extraction kinetics, and the holistic reversibility of SiO and graphite enhanced the electrical conductivity. The SiO–Sn–Co/G electrode delivered an average ICE of 77.6% and a reversible capacity of 640 mAh g−1 at 800 mA g−1, and the capacity retention was above 98% after 100 cycles, which was much higher than that of the SiO with an ICE of 55.3% and a capacity retention of 50%. These results indicated that this was reliable method to improve the reversibility and cycle ability of the SiO anode. Furthermore, based on its easy and feasible fabrication process, it may provide a suitable choice to combine other alloy anodes with the graphite anode.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li‐Ion Batteries

Zhang

Lan

2021

Energy & Environ Materials

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“…The reason may be assigned to the conductive of Sn metal layer, which can improve the electron/ion transfer capability of anode materials, [15] and the rGO coating that enhances the electrical contacts among the graphite particles [14] . Those have actually been illustrated that the enhanced electron and ion conductivities and lithium ion diffusion coefficient of anode materials are beneficial for the formation of thinner and stable SEI layers and inhibiting irreversible side reactions, [16] which further boost the ICE of a lithium ion battery.…”

Section: Resultsmentioning

confidence: 99%

Effects of Pre‐Electroplated Metal or/and Graphene on the Initial Coulombic Efficiency of Graphite Anode

et al. 2021

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Formation of solid electrolyte interface (SEI) and irreversible electrochemical reactions on the surface of anode during the lithiation/delithiation are considered as the main factors affecting the initial Coulombic efficiency of lithium‐ion battery. In this work, different metal or/and graphene is pre‐electroplated on the surface of graphite powder using a home‐built electrochemical workstation, and the surface states of graphite powder are characterized using FESEM, HRTEM, and TOF‐SIMS. The results show that metal or/and graphene are plated uniformly on the surface of graphite. The electrochemical property of the coin half‐cell using pre‐electroplated graphite as anodes shows that the metal can improve the electron/ion transfer capability of the composites that further suppress the irreversible reactions. The graphene can also control the formation of SEI on the anode, which counteract the considerable consumption of Li ions during the initial lithation/delithiation cycle.

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“…Lithium-ion batteries (LIBs) affect many aspects of our lives because of their high energy density, low self-discharge rate and good rate capacity [ 1 , 2 , 3 ]. However, the development of related equipment puts forward higher requirements for the performance of LIBs [ 4 , 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Performance Enhancement of Micro-Sized Porous Si by Integrating with Nano-Sn and Carbonaceous Materials

et al. 2021

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Silicon is investigated as one of the most prospective anode materials for next generation lithium ion batteries due to its superior theoretical capacity (3580 mAh g−1), but its commercial application is hindered by its inferior dynamic property and poor cyclic performance. Herein, we presented a facile method for preparing silicon/tin@graphite-amorphous carbon (Si/Sn@G–C) composite through hydrolyzing of SnCl2 on etched Fe–Si alloys, followed by ball milling mixture and carbon pyrolysis reduction processes. Structural characterization indicates that the nano-Sn decorated porous Si particles are coated by graphite and amorphous carbon. The addition of nano-Sn and carbonaceous materials can effectively improve the dynamic performance and the structure stability of the composite. As a result, it exhibits an initial columbic efficiency of 79% and a stable specific capacity of 825.5 mAh g−1 after 300 cycles at a current density of 1 A g−1. Besides, the Si/Sn@G–C composite exerts enhanced rate performance with 445 mAh g−1 retention at 5 A g−1. This work provides an approach to improve the electrochemical performance of Si anode materials through reasonable compositing with elements from the same family.

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Highly reversible conversion reaction in Sn2Fe@SiOx nanocomposite: A high initial Coulombic efficiency and long lifetime anode for lithium storage

Cited by 35 publications

References 44 publications

Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li‐Ion Batteries

Sn Alloy and Graphite Addition to Enhance Initial Coulombic Efficiency and Cycling Stability of SiO Anodes for Li‐Ion Batteries

Effects of Pre‐Electroplated Metal or/and Graphene on the Initial Coulombic Efficiency of Graphite Anode

Electrochemical Performance Enhancement of Micro-Sized Porous Si by Integrating with Nano-Sn and Carbonaceous Materials

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