Synthesis of porous Mn-based spinel microspheres with enhanced lithium storage properties

Wang, Zhenyan; Ai, Li; Zhu, Pengfei; Zhao, Jianfu; Li, Bo; Duan, Xiulan; Yu, Fapeng

doi:10.1016/j.jallcom.2022.166237

Cited by 6 publications

(1 citation statement)

References 42 publications

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“…The valence states and chemical composition of LDH, LDH-LS@CS, LDH-LS, and LDH-LS@CS@PAMn were analyzed by XPS, as depicted in Table and Figure . According to Figure A, the XPS spectrum of LDH suggested the existence of Mg, Al, C, and O with the respective percentages of 17.41, 7.77, 20.75, and 54.07%, with peaks appearing at 70.1 and 1301.1 eV corresponding to Al 2p and Mg 1s. , LDH-LS contained Mg, Al, C, O, and S elements, and the peak appeared at 177.2 eV, corresponding to S 2p in LDH-LS, which was related to the modification of LS. A new peak appeared in the LDH-LS@CS’s XPS spectrum, which contained the Mg, C, Al, O, S, and N, in which the peak at 402.4 eV corresponds to the LDH-LS@CS in N 1s of CS .…”

Section: Resultsmentioning

confidence: 95%

Fabrication of Green and Scalable N/P/S/Mn Containing Biobased Layered Double Hydroxide as a Novel Flame Retardant and Efficient Char Forming Agent for Polypropylene

Yan

Ding

Min

et al. 2023

ACS Sustainable Chem. Eng.

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To date, designing efficient bio-based flame retardants for polypropylene (PP) and exploring a green and scalable strategy have remained a hot topic of research. Here, we present a green and convenient preparation of a bio-based flame retardant (LDH-LS@CS@PAMn) for layer-by-layer assembly by utilizing water as an assembly medium. By electrostatic interactions, LDH-LS@CS@PAMn was prepared by the sequential assembly of sodium lignosulfonate-modified layered double hydroxide (LDH-LS) with positively charged chitosan (CS) followed by negatively charged sodium phytate (PAMn). With increasing LDH-LS@CS@PAMn loading in PP composites, the corresponding total heat release rate (THR) and peak heat release rate (PHRR) values were reduced remarkably. With loading 20 wt % LDH-LS@CS@PAMn, the THR and PHRR of PP/LDH-LS@ CS@PAMn decreased by 37.6 and 59.1%, respectively, while the limiting oxygen index significantly improved to 31.6% and the V-0 rating was successfully passed by the UL-94. Especially for PP/LDH-LS@CS@PAMn composites, the total smoke production (TSP) was reduced by 47.4%. More importantly, the residual PP/LDH-LS@CS@PAMn char changed from gray to brown-black compared to PP/LDH, indicating a stronger residual char formation. The outstanding fire safety, smoke suppression, and char formation capabilities of PP composites were ascribed to the synergistic LDH-LS@CS@PAMn hybrid's action. This work provided a feasible and reasonable modification idea to improve smoke suppression and flame retardancy for LDH.

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