Rigid Polyimide Buffering Layer Enabling Silicon Nanoparticles Prolonged Cycling Life for Lithium Storage

Fu, Ruirui; Nie, Ping; Shi, Min; Wang, Jiang; Jiang, Jiangmin; Zhang, Xiaogang; Wu, Yuting; Fang, Shan; Dou, Hui

doi:10.1021/acsaem.7b00344

Cited by 15 publications

(14 citation statements)

References 53 publications

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“…In the first lithiation process, there are two cathodic peaks at around ∼0.8 V and ∼1.4 V, and then disappear in the following cycles, which could be ascribed to the formation of SEI film, the cathodic peak at round 0.2 V is ascribed to the formation of Li x Si, corresponding to the following reaction [Eq. ] [3c]

true {x L i}^{+} + S i + e^{-} \leftrightarrow {L i}_{x} S i

…”

Section: Resultsmentioning

confidence: 99%

Dealloying Synthesis of Silicon Nanotubes for High‐Performance Lithium Ion Batteries

Zhao

Wei

et al. 2022

ChemPhysChem

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Practical applications of silicon-based anodes in lithium ion batteries have attracted unprecedented attentions due to the merits of extraordinary energy density, high safety and low cost. Nevertheless, the inevitable huge volume change upon lithiation and delithiation brings about silicon electrode integrity damage and fast capacity fading, hampering the large-scale application. Herein, a novel one-dimensional tubular siliconnitrogen doped carbon composite (Si@NC) with a core-shell structure has been fabricated using silicon magnesium alloy and polydopamine as a template and precursor. The asobtained composite exhibits remarkable specific capacity and ultrafast redox kinetics, an outstanding cycling stability with fine capacity of 583.6 mAh g À 1 at 0.5 A g À 1 over 200 cycles is delivered. Moreover, a full cell matched with LiFePO 4 cathode has demonstrated a reversible capacity of 148.8 mAh g À 1 with high Coulombic efficiency as well as an excellent energy density of 396 Wh kg À 1 . The nanotube structure engineering and silicon confined in nitrogen doped carbon effectively alleviate the volume expansion and endow the composite with superior stability. The robust strategy developed here gives a new insight into designing silicon anodes for enhanced lithium storage properties.

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true {x L i}^{+} + S i + e^{-} \leftrightarrow {L i}_{x} S i

…”

Section: Resultsmentioning

confidence: 99%

Dealloying Synthesis of Silicon Nanotubes for High‐Performance Lithium Ion Batteries

Zhao

Wei

et al. 2022

ChemPhysChem

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“…Polyimide was also reported by Zhang's group as a coating layer on silicon nanoparticles by mechanically stirring silicon powder in pre-prepared dilute polyamic acid (PAA) solution and following thermal imidization reaction of PAA to PI. [46] However, it was noted that the coating of pre-prepared PAA on silicon surface may not guarantee uniform and entire protection of silicon. So this inspired us to develop a novel route for the synthesis of Si@PI composite via in situ polymerization of PAA from monomers.…”

Section: Introductionmentioning

confidence: 99%

In Situ Polymerized and Imidized Si@Polyimide Microcapsules with Flexible Solid‐Electrolyte Interphase and Enhanced Electrochemical Activity for Li‐Storage

Huang

et al. 2022

ChemElectroChem

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A novel in situ polymerization and imidization method is adopted to synthesize Si-based microcapsule materials with polyimide shell. As a mechanically stable polymer, polyimide microcapsule shell can effectively alleviate the volume effect of silicon nanoparticles during alloying/de-alloying reactions, stabilize the electrode construction, suppress the serious side reactions of electrolyte components on silicon anode surface, and help to form a flexible, homogeneous and low-resistance solid electrolyte interphase (SEI). In addition, the conjugated carbonyl groups of polyimide make it Li + -conductive and electrochemically active, thus increasing the electrochemical activity of silicon anode. The as-prepared Si@polyimide microcapsules manifest high initial coulombic efficiency of 91.1 %, high initial discharge capacity of 2798.7 mA h g À 1 at 210 mA g À 1 (0.05 C), good rate behavior with a capacity of 1954 mA h g À 1 at 10 C current rate, and considerably improved cycling performance preserving a capacity of 1239.9 mA h g À 1 at 4.2 A g À 1 (1 C) after 300 cycles.

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“…Lithium-ion batteries (LIBs) have been dominating the electrochemical energy storage market for a long time due to their long lifespan and environmental benignity. , Nevertheless, their energy density needs to be improved further to meet the incessant requirement of more advanced devices such as electric vehicles. − Silicon (Si) is promising as the anode for energy density improvement of LIBs because it has a far higher theoretical lithium-storage capacity (4400 mAh g –1 ) than the currently commercialized graphite anode under the same potential level for lithiation–delithiation. , Unfortunately, the huge volume expansion (400%) of the Si anode after full lithiation, which is accompanied by severe electrolyte decomposition, results in disintegration and poor cycling stability of the anode. This is the main issue that hinders the commercialization of high energy LIBs based on the Si anode. − …”

Section: Introductionmentioning

confidence: 99%

Highly Stabilized Silicon Nanoparticles for Lithium Storage via Hierarchical Carbon Architecture

Jin

Saravanakumar

et al. 2020

ACS Appl. Energy Mater.

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To address the huge volume expansion and the severe side reactions on silicon (Si) as an anode for lithium storage, we propose a hierarchical carbon architecture to composite with Si nanoparticles. This architecture is composed of an outer carbon shell, N-doped carbon nanotubes (CNTs), and inner carbon coating, which originated from the Co-zeolitic imidazole framework (ZIF-67) and polydopamine (PDA). The cycling stability and rate capability of the Si anode for lithium storage have significantly improved because of the unique carbon architecture. Insitu transmission electron microscopy (TEM) and other physical characterization methods confirm that Si nanoparticles are highly stabilized concurrently by the outer carbon shell that buffers the volume change of Si and the inner carbon coating that prevents the Si from direct contact with the electrolyte, leading to the improved cycling stability of Si. Additionally, all of the carbon textures, i.e., N-doped CNTs, the outer carbon shell, and inner carbon coating, provide an excellent electronically conductive network, which endows the Si anode with excellent rate capability. This carbon architecture provides a promising solution to the issues present in the Si anode for its use in high energy lithium-ion batteries.

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Rigid Polyimide Buffering Layer Enabling Silicon Nanoparticles Prolonged Cycling Life for Lithium Storage

Cited by 15 publications

References 53 publications

Dealloying Synthesis of Silicon Nanotubes for High‐Performance Lithium Ion Batteries

Dealloying Synthesis of Silicon Nanotubes for High‐Performance Lithium Ion Batteries

In Situ Polymerized and Imidized Si@Polyimide Microcapsules with Flexible Solid‐Electrolyte Interphase and Enhanced Electrochemical Activity for Li‐Storage

Highly Stabilized Silicon Nanoparticles for Lithium Storage via Hierarchical Carbon Architecture

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