A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries

Yang, Kai; Yu, Zhihao; Yu, Changcheng; Zhu, Min; Yang, Luyi; Chen, Haibiao; Pan, Feng

doi:10.1002/ente.201900239

Cited by 11 publications

(5 citation statements)

References 43 publications

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“…Numerous scientific reports reveal delithiation of Si happens via two peaks below 0.5 V . Here, two characteristic peaks are observed at 0.25 and 0.48 V. Notably, during the reduction process the active species response for Si and graphite, merged together and revealed itself as a single reduction peak at 0.16 V. The formation of the solid electrolyte interface also occurs gradually, with a shoulder developing from 0.12 to 0.35 V . Since Si‐NPs are coated with a network of carbon, there are no sharp SEI peaks at 0.4 V, implying there is suppressed SEI formation on this novel composite anode.…”

Section: Resultsmentioning

confidence: 92%

“…Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analysis were carried out between 0.01 and 2.0 V at 0.1 mV s −1 and 1 to 10 MHz at 25 °C, respectively. 2020, 10,1902799 at 0.25 and 0.48 V. Notably, during the reduction process the active species response for Si and graphite, merged together and revealed itself as a single reduction peak at 0.16 V. The formation of the solid electrolyte interface also occurs gradually, with a shoulder developing from 0.12 to 0.35 V. [23,24,32] Since Si-NPs are coated with a network of carbon, there are no sharp SEI peaks at 0.4 V, implying there is suppressed SEI formation on this novel composite anode. Numerous scientific reports reveal delithiation of Si happens via two peaks below 0.5 V. [23,30,31] Here, two characteristic peaks are observed Adv.…”

Section: Electrochemical Performance Of the Tailored Composite Gcsi Amentioning

confidence: 98%

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In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

Parekh

Sediako

Naseri

et al. 2019

Advanced Energy Materials

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understanding of the material synthesis/ fabrication, interfacial behavior, and thermal-chemical stabilities are vital. [3] With electronic appliances requiring stable voltage delivery, the current LIBs employ graphite or mixtures with soft carbons (carbon black) to achieve stable performance at discharge curves. [4] Since 1991, various forms of ordered and disordered (i.e., soft and hard) carbon have been primarily used as anode materials. [5] With graphitic carbon, a compromise was identified, which delivered a theoretical maximum capacity of 372 mAh g −1 , while maintaining stability and cycling characteristics. This stability comes at a cost of battery capacity, as it takes six carbon atoms to bind a single lithium ion (LiC 6 ) during charging process. [6] By contrast, alternative anode materials such as silicon, can bind about four lithium atoms (SiLi 4.4 ), improving energy densities by an order of magnitude. [7] Silicon anodes have garnered huge attention as they provide over ten times more theoretical capacity (3579 mAh g −1 ) than graphite anode. Problematically, the intercalated Si, Li 3.75 Si, swells in volume by about 320% during charging. Such huge volumetric expansion causes large material stresses, resulting in anode cracking, fracturing, loss of electrical contact (delamination), unstable solid electrolyte interface (SEI) and even catastrophic cell failure. [8][9][10][11] Naturally, this is unacceptable for practical and industrial applications. To overcome the capacity limitations of carbon, and the mechanical limitations of silicon, manufacturers have moved into composite materials-with the primary structure consisting of graphitic carbon, with silicon nanoparticles implanted within. First reported by Yoshio and co-workers in 2002, the C/Si composites did improve capacity, but the silicon nanoparticles were difficult to merge with the carbon bulk. [12,13] After repeated cycling, it was found that the particles separate and capacity drops. [14] Li et al. reported fabrication of graphite-Si composite using polymer blends of poly(diallyl dimethyl-ammonium chloride) and poly(sodium 4-styrenesulfonate) to obtain capacity of 450 mAh g −1 with 95% capacity retention after 200 cycles. [15] Zhang et al. prepared core-shell structure (Si@C) using silicon nanoparticles (Si-NPs) and emulsion polymerization of acrylonitrile, followed by pyrolysis. [16] The composite [15] retained A composite anode material synthesized using silicon nanoparticles, micrometer sized graphite particles, and starch-derived amorphous carbon (GCSi) offers scalability and enhanced electrochemical performance when compared to existing graphite anodes. Mechanistic elucidation of the formation steps of tailored GCSi composite are achieved with environmental transmission electron microscopy (ETEM) and thermal safety aspects of the composite anode are studied for the first time using specially designed multimode calorimetry for coin cell studies. Electrochemical analysis of the composite anode demonstrates a high initial discharge capaci...

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Section: Resultsmentioning

confidence: 92%

Section: Electrochemical Performance Of the Tailored Composite Gcsi Amentioning

confidence: 98%

In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

Parekh

Sediako

Naseri

et al. 2019

Advanced Energy Materials

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“…Copper phosphides, an important family of TMPs, have been demonstrated as superior anode materials with respect to their high theoretical specific capacity (CuP 2 :1282 mAh g −1 , Cu 2 P 7 : 1636 mAh g −1 ), chemical stability, moderate redox potential, and environmental benignity [21–26] . Li et al ., used a ball mill method to assemble ternary Cu 2 P 7 /CuP 2 /graphite composite, which exhibits a very high specific capacity of 1254 mAh g −1 over 100 cyles for SIBs [13] .…”

Section: Introductionmentioning

confidence: 99%

Performance of CuP₂ Negative Electrode for Na‐Ion Batteries with CNTs As Stabilizer

Zhang,

Saha,

Jiang

et al. 2024

ChemistrySelect

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Transition metal phosphides (TMPs) are promising anode materials for sodium ion battery, thanks to their high theoretical specific capacities. Nevertheless, they suffer from large volume change and from poor conductivity during prolonged cycling. Here we systematically investigate the role of different kinds of single/multi‐wall carbon nanotubes (SWCNTs/MWCNTs) as additives in order to stabilize copper phosphide particles (CuP2) as anode materials in sodium ion batteries (SIBs). All composites show enhancement in the overall capacity and cycling stability compared to the pristine CuP2 due to the well‐connected CNTs on and between the CuP2 particles. At a high currency density of 1 A g−1, CuP2@SWCNTs composite with 13 wt.% SWCNTs can deliver a specific capacity over 400 mAh g−1 for more than 60 cycles, much better than conventional hard carbon materials. The CNTs enhance the conductivity and reduce capacity loss caused by the volume variation of CuP2 based electrode materials. Post‐mortem analysis by scanning electron microscopy depicts a possible battery failure mechanism, whereby the solid electrolyte interface exists in the form of nanospheres distributing at the surface of the electrode. During the repeated cycling (volume change), more fractures and cracks occur resulting in continuous interfacial reactions and consumption of sodium and electrolyte.

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“…[22][23][24] In recent years, siloxane as a substance related to Si becomes an important helper to solve the problem of silicon anode. [25][26][27] Unlike most substances generally designed for only one functional module of LIBs, siloxanes exhibit rich functionality, being used in most functional modules, including in electrodes, [28] surface modifications, [29] binders, and electrolytes (Figure 1). [30] Siloxanes have become effective solutions for providing complete electrode structures and enhancing the mechanical advantages of silicon-based materials.…”

Section: Introductionmentioning

confidence: 99%

Engineering of Siloxanes for Stabilizing Silicon Anode Materials

Wang,

Attam,

Fan

et al. 2023

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Silicon (Si) is considered the most promising anode material for the next generation of lithium‐ion batteries (LIBs) because of its high theoretical specific capacity and abundant reserves. However, the volume expansion of silicon in the cycling process causes the destruction of the electrode structure and irreversible capacity loss. As a result, the commercial application of silicon materials is greatly hindered. In recent years, siloxane‐based organosilicon materials have been widely used in silicon anode of LIBs because of their unique structure and physical and chemical properties, and have shown excellent electrochemical properties. The comprehensive achievement of siloxanes in silicon‐based LIBs can be understood better through a systematic summary, which is necessary to guide the design of electrodes and achieve better electrochemical performance. This paper systematically introduces the unique advantages of siloxane materials in electrode, surface/interface modification, binder, and electrolyte. The challenges and future directions for siloxane materials are presented to enhance their performance and expand their application in silicon‐based LIBs.

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A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries

Cited by 11 publications

References 43 publications

In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

Performance of CuP₂ Negative Electrode for Na‐Ion Batteries with CNTs As Stabilizer

Engineering of Siloxanes for Stabilizing Silicon Anode Materials

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A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries

Cited by 11 publications

References 43 publications

In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

In Situ Mechanistic Elucidation of Superior Si‐C‐Graphite Li‐Ion Battery Anode Formation with Thermal Safety Aspects

Performance of CuP2 Negative Electrode for Na‐Ion Batteries with CNTs As Stabilizer

Engineering of Siloxanes for Stabilizing Silicon Anode Materials

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Performance of CuP₂ Negative Electrode for Na‐Ion Batteries with CNTs As Stabilizer