Aqueous Zn-ion batteries with economical ZnSO4 solution as electrolyte are suffered from the tremendous tendency of dendrite formation under the condition of alkalinity while utilization of Zn(CF3SO3)2 delivers superior performance...

A dual coating of LATP and CNTs accelerates the transportation of Li+ and electrons, resulting in improved rate capability.

Herein, Li-rich layered oxides (LLOs) are modified by sulfide solid electrolyte Li10GeP2S12 (LGPS) with high ionic conductivity to enhance the diffusion of Li+ and an ultrathin Al2O3 layer is interposed between LLOs and LGPS through the atomic layer deposition (ALD) technique to inhibit the development of the highly resistive space-charge layer, the side reactions and structure transition of the composites, thus excellently promoting the electrochemical properties of the composites in liquid electrolyte. Among the different ALD cycles of Al2O3, 10 cycles of ultrathin Al2O3 layer achieves the greatest electrochemical performance. The beginning discharge capacity of LLOs@Al2O3/LGPS composites comes up to 233.4 mA h g−1 with a capacity retention of 90.6% and a voltage retention of 97.3% after 100 cycles at 0.2 C. The composites also exhibit the optimal rate capability and a high energy density of 581 Wh kg−1 at 1 C. The galvanostatic intermittent titration technique test indicates that the composites (LLOs@Al2O3/LGPS) possess the greatest Li+ diffusion coefficient (1.58 × 10−10 cm2 s−1) compared to LLOs (0.85 × 10−10 cm2 s−1) and LLOs/LGPS (1.10 × 10−10 cm2 s−1). More importantly, charge curves at the beginning of the initial charge and electrochemical impedance spectroscopy curves clearly reveal the inhibition of the development of the highly resistive space-charge layer.

Correction for ‘Enhanced structural stability and overall conductivity of Li-rich layered oxide materials achieved by a dual electron/lithium-conducting coating strategy for high-performance lithium-ion batteries’ by Dan Gao et al., J. Mater. Chem. A, 2019, 7, 23964–23972, DOI: 10.1039/C9TA04551A.

So far, the relation between financial agglomeration and export trade is complex and there are few related studies. However, research on this topic will be of great value to the development of the Guangdong-Hong Kong-Macau Greater Bay Area (the Greater Bay Area). This paper aims to use the mediation model to analyze the role of technological innovation as an mediator variable between financial agglomeration and export trade. Based on the relevant data of the Greater Bay Area from 2009 to 2018, regression analysis was performed using the three equations of the mediation model. The mediator variable was then replaced to conduct a robustness test, and it was found that there is indeed an mediation effect; technological innovation acts as an mediator variable between financial agglomeration and export trade. Therefore, it can be concluded that the financial agglomeration in the Greater Bay Area can effectively promote technological innovation, while technological innovation will inhibit exports to a certain extent.