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Seasonal variations of transport pathways andpotential sources of PM

Yuan Chen, Shaodong Xie, Bin Luo

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 1, doi: 10.1007/s11783-018-1009-z

Abstract: Seasonal pattern of transport pathways and potential sourcesof PM in Chengdu during 2012–2013were investigatedPSCF), and concentration-weighted trajectory (CWT) method.The annual hourly mean PM concentrationin Chengduand surrounding regions of Chengducontributed significantly to PM pollution.The cities in southern ChengduIn spring, long-range transport from southernXinjiang was a representative dust invasion path to Chengduwinter from the Tibetan Plateau along a westerly pathway.In summer, the potential source regions of Chengdu

Keywords： Transport pathway Backwardtrajectory Clustering analysis Potential source Chengdu

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Ether-/Ester-/Fluorine-Rich Binding Emulsion Formula for Lithium-Ion Batteries Article

Xianqing Zeng, Donglin Han, Zeheng Li, Hongxun Wang, Gu Wu, Yong Deng, Kai Liu, Li Xie, Chengdu Liang

Engineering 2022, Volume 19, Issue 12, Pages 199-206 doi: 10.1016/j.eng.2022.05.020

Abstract:

Practical application of a Si anode in a high-energy-density battery cannot be achieved due to the huge volume expansion of these anodes. Researchers have focused on adding binders to the anode to restrict volume expansion in order to address this issue, as the hydrogen bonds and mechanical properties of binders can be used to enhance adhesion and accommodate the volume changes of a Si anode. Herein, we comprehensively consider binders’ hydrogen bonds, mechanical properties, stability, and compatibility with the electrolyte solution, and design an ether-/ester-/fluorine-rich composite polymer, P(TFEMA-co-IBVE). The proposed binder formula possesses outstanding stability, adhesion, and mechanical strength; moreover, it can accommodate the dramatic volume changes of a Si electrode and exhibits excellent electrochemical performance, achieving a high areal capacity of about 5.4 mA∙h∙cm⁻². This novel polymer design may be applied to other electrode materials in the next generation of lithium-ion batteries.

Keywords： Silicon anode Emulsion copolymerization Fluorine atom Ether Ester