Precursors controlled morphologies of nanocrystalline h-BN and its growth mechanism

Kumar, Ankit; Malik, Gaurav; Sharma, Siddharth; Chandra, Ramesh; Mulik, Rahul S.

doi:10.1016/j.ceramint.2021.07.256

Cited by 34 publications

(14 citation statements)

References 34 publications

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“…Figure 5C is the N1s spectrum of BNCC, the peak locates at 397.98 eV corresponds to the N B bond. 13 In Cu2p spectrum of Figure 5D, the Cu2p coexist in BNCC, which further proves that CC was successfully grown in situ on the BN surface.…”

Section: Characterization Of Bncc Hybridssupporting

confidence: 55%

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Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Yao

Ding

et al. 2022

Polymers for Advanced Techs

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Ammonium polyphosphate (APP) is generally used to prepare fire retardant polymer composites, but it is still a challenge to further improve its flame retardant efficiency. In this study, BN‐CuCo2O4 (BNCC) hybrid was successfully prepared by in‐situ growth of copper cobaltate (CC) on boron nitride (BN) by the hydrothermal method. It was added together with APP to polylactic acid (PLA) to prepare PLA composite materials. Investigations were performed into its influence on the composite's fire‐retardant ability and thermal conductivity. When 3 wt% BNCC and 12 wt% APP was added, the limiting oxygen index (LOI) of the PLA composite reached 31.7%, which was higher than that of pure PLA improved by 69.5% and it reached V‐0 rating of vertical combustion test (UL‐94). The cone calorimeter (CCT) test showed that the addition of 3 wt% BNCC and 12 wt% APP to PLA composites significantly increased both the residual char yield and the efficiency of suppressing smoke production compared to pure PLA and APP/PLA composites. BNCC could further improve its flame retardant efficiency of APP. The thermal conductivity test showed that BNCC further improved the thermal conductivity of PLA composites. Furthermore, the residual char and fire‐retardant mechanism of the composites was analyzed and intensive studied.

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Section: Characterization Of Bncc Hybridssupporting

confidence: 55%

“…Figure 5B is the B1s spectrum of BNCC, the peak locates at 190.38 eV corresponds to the BN bond. Figure 5C is the N1s spectrum of BNCC, the peak locates at 397.98 eV corresponds to the NB bond 13 . In Cu2p spectrum of Figure 5D, the Cu2p 3/2 and Cu2p 1/2 peaks emerge at 933.03 and 953.23 eV respectively.…”

Section: Interpretation and Discussion Of Resultsmentioning

confidence: 96%

Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Yao

Ding

et al. 2022

Polymers for Advanced Techs

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“…194). [29] Additionally, a selection of area electron diffraction (SAED) pattern is also depicted in the insets of Figure 1d. The SAED pattern entitles the diffraction mark equal to the (002) plane of h-BN, [30,31] which agrees with the XRD results.…”

Section: Structural and Morphological Analysismentioning

confidence: 99%

Boron Nitride‐Based Release Agent Coating Stabilizes Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li Interface with Superior Lean‐Lithium Electrochemical Performance and Thermal Stability

Zhu

Wang

Wu³

et al. 2022

Adv Funct Materials

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Sodium super ionic conductor (NASICON)-type Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) is one of the most promising solid-state electrolytes (SSEs) owing to its high Li-ion conductivity, high stability with air, and low cost. However, LATP is less widely deployed due to its high incompatibility with lithium metal. Herein, a facile and inexpensive spray-coating approach is proposed to construct a thin 3D organic/inorganic composite layer of a commercial boron nitride-based release agent (BNRA) onto LATP. Apart from protecting LATP, this interfacial BNRA layer enables Li-ion migration through BN defects and affords low resistance at BNRA/Li interface due to in situ formation of Li-N. Compared to bare LATP, which fails to support Li stripping-plating process in a lean-lithium Li/Li symmetric cell (2 µm), BNRA-LATP runs for ≈1800 h. The assembled lean-lithium LiFePO 4 (LFP)/BNRA-LATP/Li solid state batteries (SSBs) deliver a specific capacity of 150.9 mA h g -1 at 0.5 C with minor capacity decay after 500 cycles. Besides, the BNRA layer eliminates thermal runaway risks of LATP-based SSBs by fast in-plane thermal dispersion. This work demonstrates a facile LATP-protection strategy regarding Li incompatibility and thermal runway issues, and pinpoints the interfacial formation mechanism, fulfilling the pursuit of high-performance low-cost SSEs.

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“…47 The diffraction peaks of h-BN (002), (100), (101), ( 102), (004), (110), and (112) crystal (PDF# 34-0421) do not show significant change with the increase of laser irradiation time. 48 Figure 3b is the Raman spectra of h-BN nanoflakes, GO, and L-rGO/h-BN with different laser irradiation times. The sharp Raman peak at 1360 cm −1 comes from the overlap of the graphene D peak and h-BN.…”

Section: Fabrication and Characterization Of The L-rgo/h-bn Compositesmentioning

confidence: 99%

Graphene/h-BN Nanosheet/Nanosphere Composites Constructed by In Situ Laser Irradiation with Synergistically Improved Tribological Performance

Luo

Zhu

et al. 2022

Ind. Eng. Chem. Res.

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Graphene/hexagonal boron nitride nanocomposites with different dimensions have great application prospects in the field of lubrication due to their unique layered structure and excellent mechanical properties. However, due to their complex synthesis process, easy agglomeration, and poor stability, graphene/hexagonal boron nitride nanocomposites have not yet been applied in lubricating applications. Herein, a simple and green in situ laser irradiation method is proposed to construct two-dimensional (2D) reduced graphene oxide (rGO) nanosheets and zero-dimensional (0D) hexagonal boron nitride nanosphere 2D/0D nanocomposite (L-rGO/h-BN). During the one-step laser irradiation in liquid, the GO nanosheets were reduced to rGO nanosheets. Meanwhile, the hexagonal boron nitride (h-BN) transformed from nanoflakes to nanospheres via a pulsed laser heating and reshaping process and embedded into the multilayer graphene nanosheets. The spherical h-BN nanoparticles as interlayer support can maintain the 2D graphene with a more stable layered structure, while the insertion of graphene sheets also effectively inhibits the agglomeration of the spherical h-BN nanoparticles. Therefore, a hierarchical 2D/0D layered rGO/h-BN nanocomposite was formed. Importantly, such composite nanoparticles can well disperse in the lubricating oil without significant precipitation for over 30 days and show remarkably improved tribological performance. This is due to the synergistic lubricant effect of the deposition repair effect from rGO nanosheets reducing wear and micro-bearing effect from h-BN nanospheres reducing friction by changing sliding friction into rolling friction.

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Precursors controlled morphologies of nanocrystalline h-BN and its growth mechanism

Cited by 34 publications

References 34 publications

Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Boron Nitride‐Based Release Agent Coating Stabilizes Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li Interface with Superior Lean‐Lithium Electrochemical Performance and Thermal Stability

Graphene/h-BN Nanosheet/Nanosphere Composites Constructed by In Situ Laser Irradiation with Synergistically Improved Tribological Performance

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Precursors controlled morphologies of nanocrystalline h-BN and its growth mechanism

Cited by 34 publications

References 34 publications

Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Influence of in‐situ growth of boron nitride with chestnut ball copper cobaltate synergistic ammonium polyphosphate on flame retardancy, smoke suppression, and thermal conductivity of polylactic acid

Boron Nitride‐Based Release Agent Coating Stabilizes Li1.3Al0.3Ti1.7(PO4)3/Li Interface with Superior Lean‐Lithium Electrochemical Performance and Thermal Stability

Graphene/h-BN Nanosheet/Nanosphere Composites Constructed by In Situ Laser Irradiation with Synergistically Improved Tribological Performance

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Product

Resources

About

Boron Nitride‐Based Release Agent Coating Stabilizes Li_1.3Al_0.3Ti_1.7(PO₄)₃/Li Interface with Superior Lean‐Lithium Electrochemical Performance and Thermal Stability