Integrating SEI into Layered Conductive Polymer Coatings for Ultrastable Silicon Anodes

Pan, Siyuan; Han, Junwei; Wang, Yiqiao; Li, Zhenshen; Chen, Fanqi; Guo, Yong; Han, Zishan; Xiao, Kefeng; Yu, Zhichun; Yu, Mengying; Wu, Shichao; Wang, Da‐Wei; Yang, Quan‐Hong

doi:10.1002/adma.202203617

Cited by 136 publications

(104 citation statements)

References 56 publications

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“…Figure d shows the O 1s spectra. In the fresh AN11 electrode, the two main peaks at 533.6 and 532.8 eV correspond to CO/SO and C–O/NO components, respectively; which can be also detected in the as-formed electrode. However, the content of C–O/NO components is reduced after formation, proving that the NO bond is broken; this is consistent with the disappearance of −NO 2 groups in N 1s spectra.…”

Section: Resultsmentioning

confidence: 90%

“…Based on the above research results and theoretical cognition, it can be seen that the interface chemistry between electrodes and electrolytes determines characteristics of SEI layers. , In order to optimize the SEI layer, it is necessary to achieve the preferential reduction of special components on the Si surface, so that the SEI film can be constructed and adjusted in a controlled way. Therefore, we plan to introduce beneficial functional groups of the optimized binder (amide group) and electrolyte (sulfonyl fluoride group) on the Si surface by a simplified surface modification method.…”

Section: Introductionmentioning

confidence: 99%

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Prefabrication of “Trinity” Functional Binary Layers on a Silicon Surface to Develop High-Performance Lithium-Ion Batteries

Huang

Wang

et al. 2023

ACS Nano

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The silicon (Si) anode is widely recognized as the most prospective next-generation anode. To promote the application of Si electrodes, it is imperative to address persistent interface side reactions caused by the huge volume expansion of Si particles. Herein, we introduce beneficial groups of the optimized binder and electrolyte on the Si surface by a co-dissolution method, realizing a “trinity” functional layer composed of azodicarbonamide and 4-nitrobenzenesulfonyl fluoride (AN). The “trinity” functional AN interfacial layer induces beneficial reductive decomposition reactions of the electrolyte and forms a hybrid solid–electrolyte interphase (SEI) skin layer with uniformly distributed organic/inorganic components, which can enhance the mechanical strength of the overall electrode, restrain harmful electrolyte depletion reactions, and maintain efficient ion/electron transport. Hence, the optimized Si@AN11 electrode retains 1407.9 mAh g–1 after 500 cycles and still delivers 1773.5 mAh g–1 at 10 C. In stark contrast, Si anodes have almost no reserved capacity at the same test conditions. Besides, the LiNi0.5Co0.2Mn0.3O2//Si@AN11 full-cell maintains 141.2 mAh g–1 after 350 cycles. This work demonstrates the potential of developing multiple composite artificial layers to modulate the SEI properties of various next-generation electrodes.

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Section: Resultsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Prefabrication of “Trinity” Functional Binary Layers on a Silicon Surface to Develop High-Performance Lithium-Ion Batteries

Huang

Wang

et al. 2023

ACS Nano

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“…Many efforts have been made in recent decades to tackle the problems above, such as structure design [17][18][19], surface modification [20], binder and electrolyte design [21,22]. The study of Li-Si alloy as anode materials in high-temperature molten salt lithium batteries was first reported in the 1970s [23,24].…”

Section: Introductionmentioning

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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“…[32] The integration of PANI to silicon anode is mostly in the form of PANI coating on the silicon particles. [31,[33][34][35] The most common synthesis approach is via in-situ polymerization of aniline monomer on the Si micro-or nanoparticles, where the native oxide at the surface of silicon particles binds the aniline monomer to form a continuous coating of PANI. [33] Despite that, the as-synthesized Si particles/PANI tend to cluster and agglomerate due to the molecular dispersity of PANI, which may reduce their electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

Eldona

Hawari

Hamid

et al. 2022

Chemistry An Asian Journal

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Despite its high theoretical capacity, silicon anode has limited intrinsic conductivity and experiences significant volume changes during charge-discharge. To overcome these issues, facile metal-assisted chemical etching and in-situ polymerization of aniline are employed to produce a dense 1D polyaniline/silicon nanowire forest without noticeable agglomeration as a free-standing anode for lithium-ion batteries. This hybrid electrode possesses high cycling performance, delivering a stable capacity capped at 2 mAh cm À 2 for 346 cycles of charge-discharge. Maximum capacity of 2 mAh cm À 2 is also achievable at high-rate cell testing of 2 mA cm À 2 , which cannot be obtained by the anode with plain silicon wafer and silicon nanowire only. The introduction of polyaniline on the silicon nanowire is shown to reduce the solid electrolyte interface (SEI) resistance, stabilize the SEI layer, further alleviate the effect of volume changes, and boost the conductivity of the hybrid anode, resulting in the high electrochemical performance of the anode.

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Integrating SEI into Layered Conductive Polymer Coatings for Ultrastable Silicon Anodes

Cited by 136 publications

References 56 publications

Prefabrication of “Trinity” Functional Binary Layers on a Silicon Surface to Develop High-Performance Lithium-Ion Batteries

Prefabrication of “Trinity” Functional Binary Layers on a Silicon Surface to Develop High-Performance Lithium-Ion Batteries

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

A Free‐Standing Polyaniline/Silicon Nanowire Forest as the Anode for Lithium‐ion Batteries

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