Adsorption properties of ethanol on different MgO/SiO2 surfaces were researched using density functional theory and the result is that ethanol is mainly adsorbed on MgO surface. The role of SiO2 in increasing the MgO crystal defects in the MgO/SiO2 has been obtained.
Heat and deformation are responsible for poor performance and safety of batteries, but they cannot always be avoided. To address these two issues, ZrW 2 O 8 , a negative thermal expansion (NTE) material, was adopted to modify LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) to decline deformation via in situ absorption of the generated heat. The reversible capacity of NCM811 modified with 5 wt % of ZrW 2 O 8 can remain at 180.6 mAh/g after 100 cycles at 60 °C and 1.0 C current rate, which increases the retention ratio of NCM811 by 14.8%, while the voltage difference between main redox peaks, R ct , strain after cycles, and heat from DSC of NCM811 are reduced about 47.8%, 81.0%, 28.2%, and 76.0%, respectively. According to various analysis results, the side reactions are also suppressed, and the enhancing mechanisms of ZrW 2 O 8 for NCM811 were discussed. A general strategy is developed for the management of deformation using heat to improve performance and safety of batteries.
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