Enhancing Li-S battery performance via functional polymer binders for polysulfide inhibition

The commercialization of lithium-sulfur(Li-S)batteries faces several challenges,including poor conductivity,unexpected volume expansion,and continuous sulfur loss from the cathode due to redox shuttling.In this study,we introduce a novel polymer via a simple cross-linking between poly(ether-thioureas)(PETU)and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT:PSS)as a bifunctio nal binder for Li-S batteries(devotes as"PPTU").Compared to polyvinylidene fluoride(PVDF),as-prepared PPTU exhibits significantly higher electrical conductivity,facilitating electrochemical reactions.Additionally,PPTU demonstrates effective adsorption of lithium polysulfides,leading to improved cycling stability by suppressing the shuttling effect.We investigate this behavior by monitoring morphological changes at the cell interface using synchrotron X-ray tomography.Cells with PPTU binders exhibit remarkable rate performance,desired reversibility,and excellent cycling stability even under stringent bending and twisting conditions.Our work represents promising progress in functional polymer binder development for Li-S batteries.

Poverty Alleviation Act:the Inevitable Product of the Development Law of Poverty Alleviation

Poverty alleviation is a grand project involving the whole society,and is related to the development direction of socialism and the process of national modernization.It is the basic national policy and major strategic deployment of China to eliminate poverty and improve people s livelihood under the new historical conditions.Therefore,in order to win the final victory of poverty alleviation and difficulties tackling,it is not enough to have only a policy system and an institutional system.It is also necessary to establish an effective legal system to regulate and restrain various poverty alleviation behaviors,which is the basic condition for ensuring the sustainable development of poverty alleviation.

The Practical Significance of Marx's Theory of Natural Force Resources

Marx's theory of natural force resources is an indispensable part of Marx's economic theory.Natural force resources,as a kind of natural elements that do not cost a penny,are added to the production process free of charge,and play a special role in the production process.Grasping and understanding the scientific connotation of Marx's theory of natural force resources is of great theoretical value and practical significance for promoting the harmonious unity of man and nature and adhering to the strategy of sustainable economic development.

Analysis of Marx's Theory of Natural Forces

Marx’s theory of natural forces is an indispensable part of Marx’s economic theory.As a natural element that does not need to spend a penny,natural forces are added to the production process free of charge,and play a special restrictive role in the production process.Mastering and applying the scientific connotation of Marx’s theory has very important theoretical value and practical significance for adhering to the sustainable development of nature,economy and society.

Analysis of Marxist Ecological Theory

Marxist ecological theory is an indispensable part of Marxist economic theory.Human society is the complete unity of man and nature.The material transformation between man and nature is an eternal natural necessity for all societies to be realized,and only communism can realize the true unity of man and nature.Understanding and grasping the scientific connotation of this theory has very important theoretical value and practical significance for building a harmonious society between man and nature.

Values of the Times of Marx's Theory of Science and Technology Progress and Utilization of Natural Resources

Marx's theory of scientific and technological progress and utilization of natural resources is an indispensable and important part of Marx's economic theory.To realize the harmonious unification of man and nature,man must correctly understand the effect of scientific and technological progress on the use of natural resources,fundamentally solve the problem that scientific and technological progress cannot replace the position of natural resources in economic development,and objectively evaluate the relationship between human power and the power of nature.Grasping and comprehending the scientific connotation of Marx's theory of scientific and technological progress and utilization of natural resources has a very important theoretical value and practical significance for saving and effectively using natural resources and building an environment-friendly society.

Marx's Ground Rent Theory and Innovation of China's Urban Land System

China's traditional urban land system is established in highly centralized planned economy. This system negates functions of value law and economic law fundamentally,so it is not favorable for establishment of market mechanism and development of market economy. This study took Marx's ground rent theory as guidance,combined existing problems of China's land use system,and made analysis on innovation of China's urban land system from property right system,land market and land price.

Countermeasures for Establishing a Long-term Security Mechanism for Landless Farmers

In the process of urbanization,farmers will inevitably lose their land,which is resulted from the large-scale requisition of rural collective land.The imperfect social security system in rural areas has resulted in a large number of landless farmers being transformed into urban poor people.Therefore,proper resettlement of landless farmers and the establishment of a long-term security mechanism for ensuring the basic livelihood of landless farmers are important issues that need to be resolved in the process of China’s social and economic development.

Generation,Harm and Prevention of Anthropogenic Natural Disasters

The generation of anthropogenic natural disasters is analyzed firstly,and then the harm of anthropogenic natural disasters is studied.Finally,the measures to prevention anthropogenic natural disasters are proposed,such as facing the status and role of natural resources in social and economic development squarely,actively exploring the development model of harmonizing economy with resources and environment,relying on scientific and technological progress to solve the problem of natural resources,and improving relevant policies,laws and regulations.

Analysis of Marx’s Theory of Urban and Rural Integration

Marx’s theory of urban and rural integration is an indispensable part of Marx’s economic theory.Using the basic principles of historical materialism,Marx explored the inevitable law of separation and opposition between urban and rural areas from the contradictory movement of productive forces and production relations,and put forward the theory of urban and rural integration.Analyzing and grasping the scientific connotation of Marx’s theory of urban and rural integration has very important theoretical value and practical significance for promoting the process of China’s urban-rural integration.

Practical Significance of Marxist Natural Force Resources Theory

Marxist natural force resources theory is an indispensable part of Marx's economic theory. In view of actual situation of China,Grasping the scientific connotation of Marxist natural force resources theory is of great theoretical value and practical significance to sticking to the strategy of sustainable development and promoting the harmonious development of men and nature.

Marx's Theory of Humanity and Nature

Marx's theory of humanity and nature is an indispensable part of Marx's theory of social development. The history of the development of human society is essentially a natural historical process. Human must start from certain natural premises and start from a combination of certain natural premises and human practices. This is the objective process and inevitable law of the development of human society. Grasping and understanding the scientific connotation of Marx's theory of humanity and nature has very important guiding significance for the development of human society.

Marx's Theory of Natural Resources and Economic Development

Marx theory of natural resources and economic development is an important part of Marx's economic theory. Marx not only studied the role of natural resources and revealed the characteristics of natural resources in the process of social and economic development,and also illustrated the basic ways of protecting and developing natural resources.

Marx's Theory of Ground Rent and Nationalization of Land in China

Marx's theory of ground rent is an indispensable part of Marx's economic theory. It is essential to grasp scientific connotation of Marx's theory of ground rent,and actively explore and study theories and policies of socialist ground rent and nationalization of land through combining the certainty of existence of ground rent and actual situations of nationalization of land in China.

Modern Annotation on Marx's Theory of Man and Nature

Marx's theory of man and nature is an indispensable important constituent of Marx's society development theory. The humanity is not always there,and they come from natural world and are long-term development products of the nature. Man has the undeniable dependence on the nature,but this kind of dependence is not the negative adaptation and is that the humanity has the huge motility to the nature. It should correctly process the relation between man and nature,and realize positive cycle and coordinated development between natural ecology and human society. It has the significant theory value and the practical significance for human society's sustainable development to grasp and comprehend scientific connotation of Marx's theory of man and nature.

Realistic Meaning of Agricultural Crisis Theory of Marx and Engels

Agricultural crisis theory of Marx and Engels is an indispensable important component in Marx economic crisis theory system. In the process of China market economy quickly developing,although comprehensive agricultural crisis does not appear,agricultural crisis sign has appeared. Therefore,it has very important theoretic value and actual significance to learn and study agricultural crisis theory of Marx and Engels.

Poverty Alleviation Law Being Fundamental Condition for Ensuring Sustainable Development of Targeted Poverty Alleviation

Targeted poverty alleviation is a wise and far-reaching basic national policy formulated by the Chinese people under the leadership of the Communist Party of China. It is a strategic project and strategic goal for the Chinese people to completely shake off poverty and backwardness and move towards a prosperous and powerful country,as well as the historical mission of socialism to defeat capitalism. However,targeted poverty alleviation is a grand project involving the entire society. To ensure the ultimate realization of the goal of targeted poverty alleviation,only policies and programs are far from enough. Corresponding legal systems must also be established,which is the fundamental condition for targeted poverty alleviation and sustainable development.

Homojunction and ohmic contact coexisting carbon nitride for efficient photocatalytic hydrogen evolution

Carbon nitride(CN)has attracted intensive attention as a visible light photocatalyst,but the rapid recombination of photogenerated charge carriers limits its photocatalytic activity.Herein,we develop a new strategy to construct both homojunction and ohmic junction into CN via selectively introducing metallized CN(MCN),which leads to rapid separation and transfer of photogenerated charge carriers.The polymerization of urea in the presence of KOH creates CN homojunction with amino and cyano groups.The subsequent molten salt treatment induces a new type of cyano-terminated CN that can be converted to MCN through photodoping,forming homojunction and ohmic contact coexisting CN(HOCN).The formed HOCN photocatalyst exhibits a high photocatalytic H_(2)evolution rate of 18.5 mmol·g^(-1)·h^(-1)under visible light irradiation,45-fold higher than that of bulk CN.This strategy provides a new idea for designing ohmic contact between semiconductor and metal,and realizing efficient photocatalysis by improving charge separation and transfer.

AgTFSI Pretreated Li Anode in LiI-Mediated Li-O_(2)Battery:Enabling Lithiophilic Solid Electrolyte Interphase Generation to Suppress the Redox Shuttling

Although lithium iodide(LiI)as a redox mediator(RM)can decrease the overpotential in Li-O_(2)batteries,the stability of the Li anode is still one critical issue due to the redox shuttling.Here,we firstly present a novel approach for generating Ag and LiTFSI enriched Li anode(designated as ALE@Li anode)via a spontaneous substitution between pure Li and bis(trifluoromethanesulfonyl)imide silver,in a LiI-participated Li-O_(2)cell.It can induce the generation of a lithiophilic solid electrolyte interphase(SEI)enriched with Ag,F,and N species(e.g.,Ag_(2)O,Li-Ag alloy,LiF,and Li_(3)N)during cell operation,which contributes to promoting the electrochemical performance through the shuttling inhibition.Compared to a cell with a bare Li anode,the one with as-prepared ALE@Li anode shows an enhanced cyclability,a considerable rate capability,and a good reversibility.In addition,a synchrotron X-ray computed tomography technique is employed to investigate the inhibition mechanism for shuttling effect by monitoring the morphological evolution on the cell interfaces.Therefore,this work highlights the deliberate design in the modified Li anode in an easy-to-operate and cost-effective way as well as providing guidance for the construction of artificial SEI layers to suppress the redox shuttling of RMs in Li-O_(2)batteries.