Silicon Carbide as a Protective Layer to Stabilize Si-Based Anodes by Inhibiting Chemical Reactions

Yu, Chunhui; Chen, Xiao; Xiao, Zhexi; Lei, Chao; Zhang, Chenxi; Lin, Xianqing; Shen, Boyuan

doi:10.1021/acs.nanolett.9b01492

Cited by 108 publications

(70 citation statements)

References 51 publications

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“…Yu et al. ( Yu et al., 2019 ) introduced a silicon carbide layer between the carbon layer and the silicon layer to suppress the undesired reaction between silicon and lithium hexafluorophosphate. The aggregation of the reaction products, lithium hexafluorosilicate, was effectively slowed down due to the increase of the activation energy.…”

Section: Development Of Anode Cathode and Electrolyte Materialsmentioning

confidence: 99%

Connecting battery technologies for electric vehicles from battery materials to management

2022

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Summary Vehicle electrification has always been a hot topic and gradually become a major role in the automobile manufacturing industry over the last two decades. This paper presented comprehensive discussions and insightful evaluations of both conventional electric vehicle (EV) batteries (such as lead-acid, nickel-based, lithium-ion batteries, etc.) and the state-of-the-art battery technologies (such as all-solid-state, silicon-based, lithium-sulphur, metal-air batteries, etc.). Battery major component materials, operating characteristics, theoretical models, manufacturing processes, and end-of-life management were thoroughly reviewed. Different from other reviews focusing on theoretical studies, this review emphasized the key aspects of battery technologies, commercial applications, and lifecycle management. Useful battery managing technologies such as health prediction, charging and discharging, as well as thermal runaway prevention were thoroughly discussed. Two novel hexagon radar charts of all-round evaluations of most reigning and potential EV battery technologies were created to predict the development trend of the EV battery technologies. It showed that lithium-ion batteries (3.9 points) would be still the dominant product for the current commercial EV power battery market in a short term. However, some cutting-edge technologies such as an all-solid-state battery (3.55 points) and silicon-based battery (3.3 points) are highly likely to be the next-generation EV onboard batteries with both higher specific power and better safety performance.

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Section: Development Of Anode Cathode and Electrolyte Materialsmentioning

confidence: 99%

Connecting battery technologies for electric vehicles from battery materials to management

2022

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“…The first proposal of “interphase” was described by Peled in a literature reported in 1979, [ 10 ] meaning the interface formed by lithium metal anode under the condition of liquid electrolyte. It is the ancestors of the “solid electrolyte interphase (SEI).” After then, the concept of “SEI” was used to describe the interface formed on the surface of carbon negative electrode, [ 12 ] silicon negative electrode, [ 13 ] zinc negative electrode, [ 14 ] and other oxide anodes. [ 15 ] Actually, the use of the word “interphase” is rarely involved in reported literatures before 1979.…”

Section: Introductionmentioning

confidence: 99%

Toward Critical Electrode/Electrolyte Interfaces in Rechargeable Batteries

Yan

Xiao

et al. 2020

Adv Funct Materials

323

234

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The electrode/electrolyte interface plays a critical role in stabilizing the cycling performance and prolonging the service life of rechargeable batteries to meet the sustainable energy requirements of the mobile society. The understanding of interfaces is still at the preliminary stage due to the limited research techniques and variable properties with time and potential. Herein, the latest developments focused on the interfaces in rechargeable systems including the cathode electrolyte interphase (CEI) and solid electrolyte interphase (SEI) are reviewed. The possible formation mechanisms of the electrode/electrolyte interface are discussed, followed by the introduction of two key influencing factors, specific adsorption and solvated coordinate structure, which will dominate the formation of the interface. Finally, the structure and chemical composition of the interface as well as the possible transport mechanism of lithium ions in the interface and the strategies to regulate the pathway through the interface are presented in detail. This work sheds light on the fundamental understanding of the interface and provides rational scientific principles in designing the electrode/electrolyte interface and inspires the rational design of long‐term cycling rechargeable batteries.

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“…The chemical passivation layers reduce undesirable reactions between silicon surface and the electrolyte, and thus enhance the coulombic efficiency and cycling life. [ 10 ] Core–shell structures were often applied, too. They rely on carbon materials wrapping around silicon particles to enhance the conductivity of the silicon powder, to reduce the agglomeration of silicon particles, to resist against volume expansion of active silicon material during the formation of silicon–lithium compounds, and to inhibit the contact and chemical reactions of silicon with the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pyrolysis on High-Capacity Si-Based Anode of Lithium Ion Battery with High Coulombic Efficiency and Long Cycling Life

Tzeng

Jhan

2022

Nanomaterials

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We report a facile pyrolysis process for the fabrication of a porous silicon-based anode for lithium-ion battery. Silicon flakes of 100 nm × 800 nm × 800 nm were mixed with equal weight of sodium carboxymethyl cellulose (CMC) and styrene butadiene rubber (SBR) as the binder and the conductivity enhancement additive, Ketjen Black (KB), at the weight ratio of silicon–binder–KB being 70%:20%:10%, respectively. Pyrolysis was carried out at 700 °C in an inert argon environment for one hour. The process converts the binder to graphitic carbon coatings on silicon and a porous carbon structure. The process led to initial coulombic efficiency (ICE) being improved from 67% before pyrolysis to 75% after pyrolysis with the retention of 2.1 mAh/cm2 areal capacity after 100 discharge–charge cycles at 1 A/g rate. The improved ICE and cycling performance are attributed to graphitic coatings, which protect silicon from irreversible reactions with the electrolyte to form compounds such as lithium–silicon–fluoride (Li2SiF6) and the physical integrity and buffer space provided by the porous carbon structure. By eliminating the adverse effects of KB, the anode made with silicon-to-binder weight ratio of 70%:30% exhibited further improvement of the ICE to approximately 90%. This demonstrated that pyrolysis is a facile and promising one-step process for the fabrication of silicon-based anode with high ICE and long cycling life. This is especially true when the amount and choice of conductivity enhancement additive are optimized.

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Silicon Carbide as a Protective Layer to Stabilize Si-Based Anodes by Inhibiting Chemical Reactions

Cited by 108 publications

References 51 publications

Connecting battery technologies for electric vehicles from battery materials to management

Connecting battery technologies for electric vehicles from battery materials to management

Toward Critical Electrode/Electrolyte Interfaces in Rechargeable Batteries

Effects of Pyrolysis on High-Capacity Si-Based Anode of Lithium Ion Battery with High Coulombic Efficiency and Long Cycling Life

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