Search

All-solid-state batteries using transition metal sulfide cathodes have received a lot of attention because of both their high safety and energy density. In this work, a 95MoS6·5LiI composite is employed as the active material in all-solid-state batteries, showing improved capacity and cycle life due to the increase in electrochemical reaction kinetics. This work provides a reliable cathode material with high reversible capacity and cyclability for all-solid-state rechargeable batteries. [ABSTRACT FROM AUTHOR]

Ecological infrastructure plays a crucial role in strengthening the relationship between humans and the environment by optimizing ecological space and resource allocation in urban environments. However, there are few studies on the functional assessment and spatial and temporal evolution of ecological infrastructure and its layout optimization. In this study, we developed an ecological infrastructure optimization method based on ecosystem service supply, demand, and flow in Yantai City as the study area; identified the spatial extent of urban ecological infrastructure and its spatial and temporal changes based on the spatial quantification of multiple ecosystem services; assessed whether the existing ecological infrastructure could satisfy the needs of the urban residents by calculating the ecosystem service supply and demand indexes; and used the spatial quantification of ecosystem service flows to optimize the spatial layout of urban ecological infrastructure. This study shows that, from 2010 to 2018, ecological infrastructure in Longkou, Zhaoyuan, and Laiyang decreased, contrasting with the growth in the existing peripheral areas. The study found a clear spatial mismatch between the supply and demand of ecosystem services, especially in the central urban areas, suggesting that the existing infrastructure was unable to satisfy the needs of high-demand areas. This study assessed the peripheral areas of the city using comparative ecological radiation force (CERF), including 314.64 km2 of environmentally beautiful village units as key components of ecological infrastructure in Yantai City. These findings are crucial for sustainable environmental management and urban development strategies. [ABSTRACT FROM AUTHOR]

All-solid-state lithium batteries without any liquid organic electrolytes can realize high energy density while eliminating flammability issues. Active materials with high specific capacity and favorable interfacial contact within the cathode layer are crucial to the realization of good electrochemical performance. Herein, we report a high-capacity polysulfide cathode material, MoS6@15%Li7P3S11, with a particle size of 1–4 μm. The MoS6 exhibited an impressive initial specific capacity of 913.9 mAh g−1 at 0.1 A g−1. When coupled with the Li7P3S11 electrolyte coating layer, the resultant MoS6@15%Li7P3S11 composite showed improved interfacial contact and an optimized ionic diffusivity range from 10−12–10−11 cm2 s−1 to 10−11–10−10 cm2 s−1. The Li/Li6PS5Cl/MoS6@15%Li7P3S11 all-solid-state lithium battery delivered ultra-high initial and reversible specific capacities of 1083.8 mAh g−1 and 851.5 mAh g−1, respectively, at a current density of 0.1 A g−1 within 1.0–3.0 V. Even under 1 A g−1, the battery maintained a reversible specific capacity of 400 mAh g−1 after 1000 cycles. This work outlines a promising cathode material with intimate interfacial contact and superior ionic transport kinetics within the cathode layer as well as high specific capacity for use in all-solid-state lithium batteries. [ABSTRACT FROM AUTHOR]

It is vital to conduct urban ecosystem service evaluations and demarcate ecological management zoning to preserve regional ecological security and the spatial optimization of urban functions. This study assessed and examined the spatial distribution characteristics of the supply and demand of five typical ecosystem services in Zhengzhou and their matching pattern. Based on Maslow's hierarchy of needs, urban ecological management zoning was demarcated to guide the spatial optimization of urban functions. The results showed that most of the ecological goods and services in Zhengzhou were generally provided in the west and south of the city. High-value areas of ecosystem service demand were mainly found in the urban center. There was a definite circle structure of total ecosystem service demand. Carbon sequestration, grain production, water yield, and habitat maintenance in the urban center area indicated an ecological deficit. Soil conservation in most regions was a surplus trend. Zhengzhou was demarcated into five groups of ecological management zoning. Different preferences had an impact on the ecosystem service supply and demand. The rise in living conditions led to an increase in the demand for high-level ecological services. This study can provide an essential theoretical basis and practical assistance for urban space optimization and ecosystem service management. [ABSTRACT FROM AUTHOR]

The rapid urbanization and population growth in China have brought the issues of social equity and justice to the forefront. The supply and layout of public service facilities play a crucial role in determining the residents' quality of life and have become a significant factor triggering social equity and justice concerns. This study took Zhengzhou's urban core as an example. From the perspectives of regional equality, spatial equity, and social justice, the service area analysis and Gaussian two-step floating catchment area method were used to analyze the public service facilities' layout situation and the equity and justice issue and to discuss the causes of the current situation. The study found that the social equity and justice of public facilities in Zhengzhou's urban core were more prominent. The accessibility of public facilities inside and outside the 3rd ring road of the urban core exhibited marked differences, indicating a need for improvement in regional equality and spatial equity. Vulnerable groups lacked special care and public facilities lacked justice. Combined with the development process of urbanization in Zhengzhou, this paper argued that this was closely related to the government's public policies. [ABSTRACT FROM AUTHOR]

The all‐solid‐state lithium–sulfur battery is considered to be a promising energy device due to high energy density and excellent safety. However, sulfur suffers from its insulating nature and large volume changes. Employing transition‐metal sulfide cathodes is an attractive alternative. Herein, a high energy density sulfur‐rich MoS6‐based nanocomposite is designed, where MoS6 nanospheres are homogenously anchored on carbon nanotubes (CNTs) by a wet‐chemical method, providing improved electronic conductivity and reduced volume changes. In addition, a nanosized Li7P3S11 electrolyte is in situ coated on the surface of MoS6‐CNT20 to realize intimate interface contact and form nanoscale electronic/ionic transportation networks. The resultant MoS6‐CNT20@15%Li7P3S11 composite shows high electronic conductivity (1.7 × 10−1 S cm−1) and ionic conductivity (6.7 × 10−4 S cm−1), which are eight and three orders of magnitude improved compared to those of MoS6. The Li/Li6PS5Cl/MoS6‐CNT20@15%Li7P3S11 battery exhibits an initial discharge capacity of 1034.32 mAh g−1 at 0.1 A g−1. In addition, an ultrahigh reversible energy density of 1640 Wh kg−1 for the active material can be realized, which is the highest among all transition‐metal sulfide cathodes. Moreover, it shows a reversible capacity of 550.00 mAh g−1 at 0.5 A g−1 after 1000 cycles, demonstrating that the sulfur‐rich MoS6‐based nanocomposite is a promising highenergy density cathode material for next‐generation all‐solid‐state lithium batteries. [ABSTRACT FROM AUTHOR]

All-solid-state batteries using transition metal sulfide cathodes have received a lot of attention because of both their high safety and energy density. In this work, a 95MoS 6 ·5LiI composite is employed as the active material in all-solid-state batteries, showing improved capacity and cycle life due to the increase in electrochemical reaction kinetics. This work provides a reliable cathode material with high reversible capacity and cyclability for all-solid-state rechargeable batteries.

All-solid-state lithium batteries coupled with transition metal sulfide cathodes have gained significant attention due to their high energy density and exceptional safety. However, there are still critical challenges impeding their practical application, such as limited capacity delivery, weak ionic reaction kinetics and volume expansion. Herein, an a-NbS 4 /20%VGCF@15%Li 7 P 3 S 11 nanocomposite cathode material is employed in all-solid-state batteries. A certain proportion of VGCF is introduced into crystalline NbS 4 in order to mitigate the volume expansion and improve electronic conductivity. At the same time, a-NbS 4 /20%VGCF is in situ coated with a Li 7 P 3 S 11 solid electrolyte layer to achieve an intimate interfacial contact. The obtained a-NbS 4 /20%VGCF@15%Li 7 P 3 S 11 nanocomposite exhibits a remarkable electronic conductivity (1.0 × 10 -1 S cm -1 ) and ionic conductivity (5.5 × 10 -4 S cm -1 ), which are improved by five and two orders of magnitude compared to those of NbS 4 , respectively. The Li/Li 6 PS 5 Cl/a-NbS 4 /20%VGCF@15%Li 7 P 3 S 11 battery exhibits a high initial discharge capacity of 1043.25 mA h g -1 at 0.1 A g -1 . Even at 0.5 A g -1 , it could provide a reversible capacity of 403.2 mA h g -1 after 500 cycles. This work provides a promising cathode material for all-solid-state lithium batteries with improved ionic/electronic conductivity, high reversible capacity and superior cycling stability.