A Mechanistic and Quantitative Understanding of the Interactions between SiO and Graphite Particles

Gao, Xiang; Li, Suli; Xue, Jiachen; Hu, Dianyang; Xu, Jun

doi:10.1002/aenm.202202584

Cited by 26 publications

(15 citation statements)

References 87 publications

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“…The accumulation of mechanical stresses can lead to fatigue and damage of electrode materials, resulting in reduced battery performance and lifespan. Gao et al 65 validated an electrochemo−mechanical model to reveal the potential control mechanisms for SiO/graphite. The results demonstrate that 8−10 wt % SiO is an optimization for cycle life at 1 C. In addition, positioning SiO near the separator and decreasing particle size has been found to benefit electrochemical performance without significantly affecting the mechanical mismatch.…”

Section: Methodsmentioning

confidence: 99%

Challenges and Opportunities for Fast-Charging Batteries

Geng,

Zhang,

Xie

et al. 2023

J. Phys. Chem. C

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Lithium-ion batteries have dominated the markets of portable devices, electric vehicles, and grid storage. However, the increased safety concerns, range anxiety, and the mismatch between charging time and expectations resulted in a severe hampering of their applications in electric vehicles (EVs). This Perspective focuses on the limiting factors and the recent progress of fast-charging lithium-ion batteries. The limiting factors are discussed from the materials, electrolytes, electrodes, cells, packs, systems, charging stations, and safety issues including the potential impact of fast charging on thermal runaway characteristics. Then, performance optimization strategies from multiscales for fast charging are reviewed. In particular, the key to future fast-charging technologies lies in highvoltage charging techniques and advanced thermal management systems. These technologies can achieve both fast charging and uniform temperature distribution. Finally, the technological gaps are identified and suggestions are made for future research direction, emphasizing the necessity of developing advanced on-board methods to detect battery resistance and temperature rises with intelligent charging algorithms, which are viewed as the basis of fast charging.

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Section: Methodsmentioning

confidence: 99%

Challenges and Opportunities for Fast-Charging Batteries

Geng,

Zhang,

Xie

et al. 2023

J. Phys. Chem. C

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“…These interfacial encapsulation strategies can be generally classified into three categories according to the Li + /e – transport characteristics, as follows: Physical coating layer that contributes to enhance the e – conductivity (Figure a). In this case, various carbon materials such as graphite, − amorphous pyrolytic carbon, graphene, , and carbon nanotubes have been employed via physical mixing such as mechanical ball milling, spray drying, etc. But, due to the weak physical binding between carbon and SiO, effective ICT is retarded or even obstructed.…”

Section: Introductionmentioning

confidence: 99%

High-Rate SiO Lithium-Ion Battery Anode Enabled by Rationally Interfacial Hybrid Encapsulation Engineering

Zhu,

Fang,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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The development of a high-rate SiO lithium-ion battery anode is seriously limited by its low intrinsic conductivity, sluggish interfacial charge transfer (ICT), and unstable dynamic interface. To tackle the above issues, interfacial encapsulation engineering for effectively regulating the interfacial reaction and thus realizing a stable solid electrolyte interphase is significantly important. Hybrid coating, which aims to enhance the coupled e − / Li + transport via the employment of dual layers, has emerged as a promising strategy. Herein, we construct a hybrid MXene-graphene oxide (GO) coating layer on the SiO microparticles. In the design, Ti 3 C 2 T x MXene acts as a "bridge", which forms a close covalent connection with SiO and GO through Ti−O−Si and Ti−O−C bonds, respectively, thus greatly reducing the ICT resistance. Moreover, the Ti 3 C 2 T x with rich surface groups (e.g., −OH, −F) and GO outer layers with an intertwined porous framework synergistically enable the pseudocapacitance dominated behavior, which is beneficial for fast lithium-ion storage. Accordingly, the asmade Si@MXene@GO anode exhibits considerably reinforced lithium-ion storage performance in terms of superior rate performance (1175.9 mA h g −1 at 5 A g −1 ) and long cycling stability (1087.6 mA h g −1 capacity retained after 1000 cycles at 2.0 A g −1 ). In-depth interfacial chemical composition analysis further reveals that an inorganically rich interphase with a gradient distribution of LiF and Li 2 O formed at the electrolyte/anode interface ensures mechanical stability during repeated cycles. This work paves a feasible way for maximizing the potential of SiO anodes toward fast-charging lithium-ion batteries.

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“…Until now, for the SiO/Gr anode battery, a few works have been performed to explore the EIS properties correlating to SOC and SOH. Meanwhile, Xu et al [20] established a multi-physics models to quantitatively investigate the interaction of SiO/Gr anode, the results demonstrated that an 8-10 wt.% of SiO is an optimal choice for the composite anode. Manthiram et al [8] proposed that there is a crossover effect between silicon particles and graphite particles, which can have an impact on the performance of LIBs.…”

Section: Introductionmentioning

confidence: 99%

Impedance Investigation of Silicon/Graphite Anode during Cycling

et al. 2023

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Silicon/graphite material is one of the most promising anodes for high-performance lithium-ion batteries. However, the considerable deformation occurring during the charge/discharge process leading to its degradation hinders its application. Research on the electrochemical performance of silicon/graphite anode have mainly focused on its cyclic performance and microscopic mechanism, whilst the correlation between electrochemical performance and the mechanical deformation of batteries at the cell level is in few numbers. In this study, the electrochemical performance and cycling performance of the cells in Ah-level silicon/graphite anode pouch cells with different SiO weight ratios (5 wt.%, 10 wt.%, and 20 wt.%) in the anode, and LiNi0.8Co0.1Mn0.1 as the cathode are investigated by quantitative analysis. It is found that cells with different SiO weight ratios in anodes under a different state of charge (SOC) and state of health (SOH) demonstrate remarkable differences in electrochemical impedance characteristics. The results show that SOC, SOH and the weight ratios of SiO are the main factors affecting the impedance characteristics for batteries with silicon/graphite anode, which is deeply related to the change in the thickness of the electrode during lithiation/delithiation. This research facilitates the application of EIS in battery management and the design of silicon/graphite anode lithium-ion batteries.

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A Mechanistic and Quantitative Understanding of the Interactions between SiO and Graphite Particles

Cited by 26 publications

References 87 publications

Challenges and Opportunities for Fast-Charging Batteries

Challenges and Opportunities for Fast-Charging Batteries

High-Rate SiO Lithium-Ion Battery Anode Enabled by Rationally Interfacial Hybrid Encapsulation Engineering

Impedance Investigation of Silicon/Graphite Anode during Cycling

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