Self-Contained Fragmentation and Interfacial Stability in Crude Micron-Silicon Anodes

Heist, Ashley; Piper, Daniela Molina; Evans, Tyler; Kim, Seul Cham; Han, Sang Sub; Oh, Kyu Hwan; Lee, Se-Hee

doi:10.1149/2.0811802jes

Cited by 11 publications

(12 citation statements)

References 60 publications

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“…4 In particular, the combinations of pyrrolidinium z E-mail: sehee.lee@colorado.edu (PYR+) and either bis(trifluoromethanesulfonyl)imide (TFSI-) or bis(fluorosulfonyl)imide (FSI-) with LiFSI or LiTFSI lithium salts have shown remarkable results when paired with high-energy electrode materials. [7][8][9][10][11][12][13] Due to broader electrochemical stability windows, these ILs enable stable cycling to higher voltages. 10,13 Additionally, these IL electrolytes form favorable interfacial passivation layers on many high-energy electrode materials, effectively protecting those materials from cycling-induced degradation and enabling more complete utilization of the active material.…”

mentioning

confidence: 99%

High-Energy Nickel-Rich Layered Cathode Stabilized by Ionic Liquid Electrolyte

Heist

Hafner

Lee

2019

J. Electrochem. Soc.

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In order to meet the critical energy-storage challenges of the future, a next-generation lithium-ion battery will need to achieve a higher energy density and longer cycle life. While increasing the nickel content in layered LiMO 2 (M = Ni, Mn, Co) significantly improves the capacity of the material, nickel-rich cathodes cycled in conventional organic electrolytes commonly suffer from crystallographic phase transformation and the growth of a resistive interfacial layer, both of which result in voltage fade and capacity degradation during cycling. However, pairing a nickel-rich cathode with an appropriate ionic liquid (IL) electrolyte enables exceptional cycling stability and energy retention. This work demonstrates how a pyrrolidinium-based IL electrolyte not only allows for cycling to higher voltages but shows a 95% energy retention and average discharge capacity of 189 mAh g −1 over 150 cycles between 3 and 4.5 V vs. Li/Li + with a nickel-rich layered cathode. Based on electrochemical and crystallographic analyses, the exceptional performance of the cells cycled in IL is attributed to the stability of the electrode-electrolyte interfacial layer formed by the IL which protects the active material and suppresses the structural degradation commonly observed in nickel-rich cathodes.

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confidence: 99%

High-Energy Nickel-Rich Layered Cathode Stabilized by Ionic Liquid Electrolyte

Heist

Hafner

Lee

2019

J. Electrochem. Soc.

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“…Polymer materials with superior processability, high flexibility, and good ionic conductivity are deemed ideal artificial protective layer materials. [209] Organic polymers, such as cyclizedpolyacrylonitrile(cPAN), [210] polyaniline (PANI), [13] and polypyrrole (PPy) [208] are also promising for solving the large volume change and inducing the formation of high-quality SEI. As shown in Figure 11a, Wu et al [13] adopted an in situ polymerization approach to incorporate a conductive bi-functional conformal PANI polymer coating onto the μSi anode surface.…”

Section: Organic Coatingsmentioning

confidence: 99%

Approaching Microsized Alloy Anodes via Solid Electrolyte Interphase Design for Advanced Rechargeable Batteries

Tian

Zhang

2023

Advanced Energy Materials

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Microsized alloy anodes (Si, P, Sb, Sn, Bi, etc.) with high capacity, proper working potential, high tap density, and low cost are promising for breaking the energy limits of current rechargeable batteries. Nevertheless, they suffer from large volume changes during cycling processes, posing a great challenge in maintaining a thin, dense, and intact solid electrolyte interphase (SEI) layer. Recent progress suggests that the problematic SEI layer can be turned to advantage in maintaining the integrity of microparticle anodes if well designed, which is expected to significantly boost the cyclic stability without resorting to complex electrode architectures. Advances in this attractive direction are reviewed to shed light on future development. First, the key issues of high-capacity microsized alloy anodes and the fundamentals of the SEI layer are discussed. Thereafter, progress on the regulation strategies of SEI layers in high-capacity microsized alloy anodes for advanced rechargeable batteries, including electrolyte engineering, electrode surface modification, cycle protocols, and electrode architecture design, are outlined. Finally, potential challenges and perspectives on developing high-quality SEI layers for microsized alloy anodes are proposed.

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“…Lee group combined mechanically resilient coatings of cyclized-polyacrylonitrile (cPAN) with a room-temperature ionic liquid (RTIL) electrolyte to enhance the interface of SiMP and maintain the integrity of electrodes (Fig. 7(c)) [139]. More impressively, incorporating a combustion-reacted nanoporous ZnO matrix into a SiMP electrode (np-ZnO/SiMP) could significantly alleviate volume expansion of Si and stabilize the electrochemical performance (Fig.…”

Section: The Other Si-based Compositementioning

confidence: 99%

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

Liu

et al. 2022

Nano Research Energy

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Silicon (Si) is one of the most promising anode materials for high-energy lithium-ion batteries. However, the widespread application of Si-based anodes is inhibited by large volume change, unstable solid electrolyte interphase, and poor electrical conductivity. During the past decade, significant efforts have been made to overcome these major challenges toward industrial applications. This review summarizes the recent development of microscale Si-based electrodes fabricated by Si microparticles or other industrial bulk materials from the perspective of industrialization. First, the challenges for microscale Si anodes are clarified. Second, structural design strategies of stable micro-sized Si materials are discussed. Third, other critical practical metrics, such as robust binder construction and electrolyte design, are also highlighted. Finally, future trends and perspectives on the commercialization of Si-based anodes are provided. KEYWORDSsilicon, micro-sized particles, lithium-ion batteries, porous structures, polymer binder, electrolyte design Figure 1 Overview of Si-based anodes for LIBs: (a) merits and (b) fundamental challenges. Reproduced with permission from Ref. [16], © Wiley-VCH GmbH 2021.

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Self-Contained Fragmentation and Interfacial Stability in Crude Micron-Silicon Anodes

Cited by 11 publications

References 60 publications

High-Energy Nickel-Rich Layered Cathode Stabilized by Ionic Liquid Electrolyte

High-Energy Nickel-Rich Layered Cathode Stabilized by Ionic Liquid Electrolyte

Approaching Microsized Alloy Anodes via Solid Electrolyte Interphase Design for Advanced Rechargeable Batteries

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

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