Preparation and characterization of energetic composite films with mutual reactions based on B/PVDF mosaic structure

Qin, Ying-zhi; Yu, Haomiao; Wang, Deqi; Ye, Song; Li, Fengsheng; Liu, Jie

doi:10.1016/j.cej.2022.138792

Cited by 15 publications

(4 citation statements)

References 43 publications

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“…As displayed in Figure 3a-c orthorhombic γ crystal, the peak at 26.6° can be ascribed to (021) plane of α-PVDF, and 40° peak belongs to the (041) and ( 132) planes of γ-PVDF crystal. [33] The relatively high crystallinity for PVDF can be attributed to the fact that the constitutional units (CH 2 CF 2 ) are inclined to line up via the dipole-dipole coupling. [34,35] Given that the highly crystalline binder was unfavorable to the homogeneous distribution of active nanoparticles and the integrity of electrodes upon the drying procedure, the amorphous state of OXP and OXP/CNT-1.5 was preferable.…”

Section: Preparation and Characterization Of Oxp/cnt-15 Bindermentioning

confidence: 99%

Rotatable Methylene Ether Bridge Units Enabling High Chain Flexibility and Rapid Ionic Transport in a New Universal Aqueous Conductive Binder

Zhang

Xia

Wei

et al. 2023

Adv Funct Materials

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Binders play an essential role in maintaining the mechanical integrity and stability of electrodes. Herein, a novel aqueous and conductive binder (OXP/CNT‐1.5) consisting of carbon nanotubes (CNTs) interwoven with a flexible nano‐film of oxidized pullulan (OXP) is designed. The rotatable methylene ether bridge units within OXP chain endow the binder with high chain flexibility, facilitate rapid ion transport, and buffer severe volumetric expansion during charge‐discharge cycling. Furthermore, its tight intertwining with CNTs forms continuously conductive and flexible skeletons, which can firmly grasp active nanoparticles through a “face‐to‐point” bonding type, guaranteeing the electrodes high conductivity and outstanding mechanical integrity. More importantly, these conductive binders are applicable to the Si/C anode as well as the LiFePO4 cathode. The as‐fabricated Si/C anode delivers a 88.2% capacity retention after 100 cycles and 80.2% capacity retention at 0.5 A g−1 (vs 0.05 A g−1), far surpassing the electrode fabricated by conventional polyvinylidene fluoride binder and carbon black mixtures. The LiFePO4/Si/C full cells based on OXP/CNT‐1.5 demonstrate excellent electrochemical behavior and stability (97.4% capacity retention after 100 cycles). This work highlights the key role of rotatable methylene ether bridge units to enhance the flexibility, ion conductivity, and stability, which is inspiring in the context of designing novel binders for high‐performance batteries.

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Section: Preparation and Characterization Of Oxp/cnt-15 Bindermentioning

confidence: 99%

Rotatable Methylene Ether Bridge Units Enabling High Chain Flexibility and Rapid Ionic Transport in a New Universal Aqueous Conductive Binder

Zhang

Xia

Wei

et al. 2023

Adv Funct Materials

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“…22 The diffusion rate of oxidizing components in liquid B 2 O 3 is very slow that inside active B cannot have contact with the oxide component, which causes B to be difficult to ignite and burn completely. [23][24][25][26][27] Moreover, B is a typical electron-decient atom, as shown in Scheme 1, which makes the dehydration crosslinking reaction of B 2 O 3 and H 3 BO 3 with hydroxyl prepolymer easy to occur. 20,21 Lithium uoride (LiF) can decompose B 2 O 3 into the gaseous product LiBO 2 and BOF at a lower temperature (about 600 °C), as shown in eqn (1), which can improve the ignition and combustion performance of B.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual-core–shell structure B@LiF@AP with multi-effect synergies to improve processibility and energy release characteristics of B

et al. 2023

Self Cite

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“…Currently, the fuel sources mainly include metals (aluminum (Al) [ 11 ], magnesium (Mg) [ 12 ], titanium (Ti) [ 13 ], etc.) and metalloids (boron (B) [ 14 ], silicon (Si) [ 15 ], etc.). In addition, most of the studies on MICs have focused on Al as the fuel to explore its reaction and exothermic properties when combined with different oxidants.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Si Nanoparticles by Magnesiothermic Reduction for the Enhanced Reactivity

Fei

Zhang

et al. 2023

Molecules

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In this study, mesoporous silicon nanoparticles (M-Si) were successfully prepared by a magnesiothermic reduction of mesoporous silica nanoparticles, which were synthesized by a templated sol-gel method and used as the precursors. M-Si exhibited a uniform size distribution with an average diameter of about 160 nm. The measured BET surface area was 93.0 m2 g−1, and the average pore size calculated by the BJH method was 16 nm. The large internal surface area provides rich reaction sites, resulting in unique interfacial properties and reduced mass diffusion limitations. The mechanism of the magnesiothermic reduction process was discussed. The reactivity of prepared M-Si was compared with that of commercially available non-porous Si nanopowder (with the average diameter of about 30 nm) by performing simultaneous thermogravimetry and differential scanning calorimetry in the air. The results showed that the reaction onset temperature indicated by weight gain was advanced from 772 °C to 468 °C, indicating the promising potential of M-Si as fuel for metastable intermolecular composites.

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Preparation and characterization of energetic composite films with mutual reactions based on B/PVDF mosaic structure

Cited by 15 publications

References 43 publications

Rotatable Methylene Ether Bridge Units Enabling High Chain Flexibility and Rapid Ionic Transport in a New Universal Aqueous Conductive Binder

Rotatable Methylene Ether Bridge Units Enabling High Chain Flexibility and Rapid Ionic Transport in a New Universal Aqueous Conductive Binder

Dual-core–shell structure B@LiF@AP with multi-effect synergies to improve processibility and energy release characteristics of B

Preparation of Mesoporous Si Nanoparticles by Magnesiothermic Reduction for the Enhanced Reactivity

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