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Ni-rich layered metal oxide of LiNi0.8Co0.1Mn0.1O2 is a promising cathode material for next-generation lithium ion batteries because of its capability to deliver a high capacity; however, intrinsic...

Most existing smoke detection methods have low detection accuracy in complicated scenes. We propose a YOLO-SMOKE model which shows strong robustness and high accuracy. We use mosaic data augmentation to avoid model overfitting which is caused by the simple background in the public datasets. We refine the residual module by using the efficient channel attention module and add dropblock after every convolutional layer. Then we modify the loss function. The YOLO-SMOKE model outperforms the original model by 4.91% mAP and it achieves 98.75% accuracy in the public smoke video test. The experimental results show that our method has better accurate and robustness.

Nowadays nickel-rich LiNi x Co y Mn 1-x-y O 2 (0.5 0.8 Co 0.1 Mn 0.1 O 2 cathode materials by LiAlO 2 . Hydrolysis of AlCl 3 creates H + to etch the hydroxide precursor of LiNi 0.8 Co 0.1 Mn 0.1 O 2 and to induce oriented deposition of Al(OH) 3 layer on surface of the hydroxide precursor, which is transformed into uniform γ-LiAlO 2 coating on the LiNi 0.8 Co 0.1 Mn 0.1 O 2 particles after the subsequent lithium impregnating and annealing. The 2.2 wt% LiAlO 2 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode delivers a high rate capacity of 135.2 mAh g −1 at 10 C and long cyclability with capacity retention of 85.8% after 200 cycles at 0.5 C. In addition, the thermal stability of LiAlO 2 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 is significantly improved. The enhanced battery performances are due to partial Al 3+ doping and Li + conductive LiAlO 2 coating layer that provides well-connected networks for Li + transport, improves the structural stability and prevents core materials from the attack by side products.

Ni-rich layered metal oxide of LiNi

The Cu/Zn/Al catalysts, prepared from the calcination and reduction of hydrotalcite-like compounds containing Cu, Zn and Al, were introduced to the aqueous-phase hydrogenation of furfural from pyrolysis of biomass. And the target production was cyclopentanol. The catalyst performance was investigated from the aspects of catalyst composition, calcination temperature, reaction temperature, initial hydrogen pressure and reaction time. Among all the variables, calcination temperature had a profound impact on the catalyst performance. The furfural conversion was up to nearly 100 % with a cyclopentanol yield of 84 %, when the hydrogenation reaction was carried out over 600 °C calcined hydrotalcite catalyst with a Cu/Zn/Al molar ratio of 6:9:5 at 150 °C with an initial hydrogen pressure of 4 MPa for 10 h. The features of Cu/Zn/Al catalysts were investigated via XRD, XPS, TPR, SEM and BET.