To effectively enhanced structural stability and cycling performance,a dual carbon protection strategy is proposed to fabricate Si nanoparticles encapsulated in citric acid(CA)-derived inner carbon layer and zeolitic ...To effectively enhanced structural stability and cycling performance,a dual carbon protection strategy is proposed to fabricate Si nanoparticles encapsulated in citric acid(CA)-derived inner carbon layer and zeolitic imidazolate framework-67(ZIF-67) derived outer carbon layer(Si@C-CA@c-ZIF).The results reveal that citric acid-derived carbon facilitates a uniform ZIF-67 coating on the Si surface and serves as the inner carbon precursor to reduce volumetric expansion of Si particles,more importantly,it can enhance the transport of electrons and ions between Si particles and ZIF-67-derived carbon.The ZIF-67-derived outer carbon layer further restricts Si particle expansion and enhances conductivity.Evaluated as anode material for lithium ion batteries,the Si@C-CA@c-ZIF anode demonstrates outstanding lithium storage performance,the high specific capacity is high to 924 m A·h·g^(-1)at 1.0 A·g^(-1) after 10 cycles of activation,and it still maintains a reversible capacity of 703.3 m A·h·g^(-1) after 1000 cycles,along with a capacity retention of 76.1%.This work highlights the effectiveness of the dual carbon framework in addressing the volume expansion and conductivity limitations of Si,with potential applications for other high-capacity anode materials.展开更多
Numerous arthropods evolve and optimize sensory systems, enabling them to effectively adapt complex and competitive habitats. Typically, scorpions can precisely perceive the prey location with the lowest metabolic rat...Numerous arthropods evolve and optimize sensory systems, enabling them to effectively adapt complex and competitive habitats. Typically, scorpions can precisely perceive the prey location with the lowest metabolic rate among invertebrates. This biological phenomenon contrasts sharply with engineered systems, which generally associates high accuracy with substantial energy consumption. Inspired by the Scorpion Compound Slit Sensilla (SCSS) with a stress field modulation strategy, a bionic positioning sensor with superior precision and minimal power consumption is developed for the first time, which utilizes the particular Minimum Positioning Units (MPUs) to efficiently locate vibration signals. The single MPU of the SCSS can recognize the direction of collinear loads by regulating the stress field distribution and further, the coupling action of three MPUs can realize all-angle vibration monitoring in plane. Experiments demonstrate that the bionic positioning sensor achieves 1.43 degrees of angle-error-free accuracy without additional energy supply. As a proof of concept, two bionic positioning sensors and machine learning algorithm are integrated to provide centimeter (cm)-accuracy target localization, ideally suited for the man-machine interaction. The novel design offers a new mechanism for the design of traditional positioning devices, improving precision and efficiency in both the meta-universe and real-world Internet-connected systems.展开更多
It is well-documented that phytochromes can control plant growth and development from germination to flowering. Additionally, these photoreceptors have been shown to modulate both biotic and abiotic stress. This has l...It is well-documented that phytochromes can control plant growth and development from germination to flowering. Additionally, these photoreceptors have been shown to modulate both biotic and abiotic stress. This has led to a series of studies exploring the molecular and biochemical basis by which phytochromes modulate stresses, such as salinity, drought, high light or herbivory. Evidence for a role of phytrochromes in plant stress tolerance is explored and reviewed.展开更多
基金financially supported by Industry foresight and common key technology research in Carbon Peak and Carbon Neutrality Special Project from Zhenjiang city (CG2023003)National Natural Science Foundation of China (22379056,22409076)。
文摘To effectively enhanced structural stability and cycling performance,a dual carbon protection strategy is proposed to fabricate Si nanoparticles encapsulated in citric acid(CA)-derived inner carbon layer and zeolitic imidazolate framework-67(ZIF-67) derived outer carbon layer(Si@C-CA@c-ZIF).The results reveal that citric acid-derived carbon facilitates a uniform ZIF-67 coating on the Si surface and serves as the inner carbon precursor to reduce volumetric expansion of Si particles,more importantly,it can enhance the transport of electrons and ions between Si particles and ZIF-67-derived carbon.The ZIF-67-derived outer carbon layer further restricts Si particle expansion and enhances conductivity.Evaluated as anode material for lithium ion batteries,the Si@C-CA@c-ZIF anode demonstrates outstanding lithium storage performance,the high specific capacity is high to 924 m A·h·g^(-1)at 1.0 A·g^(-1) after 10 cycles of activation,and it still maintains a reversible capacity of 703.3 m A·h·g^(-1) after 1000 cycles,along with a capacity retention of 76.1%.This work highlights the effectiveness of the dual carbon framework in addressing the volume expansion and conductivity limitations of Si,with potential applications for other high-capacity anode materials.
基金supported by the National Natural Science Foundation of China(No.52175269)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.52021003)+2 种基金Science and Technology Research Project of Education Department of Jilin Province(JJKH20231146KJ,JJKH20241262KJ)Project ZR2024ME104 supported by Shandong Provincial Natural Science FoundationChina Postdoctoral Science Foundation(No.2024M751086).
文摘Numerous arthropods evolve and optimize sensory systems, enabling them to effectively adapt complex and competitive habitats. Typically, scorpions can precisely perceive the prey location with the lowest metabolic rate among invertebrates. This biological phenomenon contrasts sharply with engineered systems, which generally associates high accuracy with substantial energy consumption. Inspired by the Scorpion Compound Slit Sensilla (SCSS) with a stress field modulation strategy, a bionic positioning sensor with superior precision and minimal power consumption is developed for the first time, which utilizes the particular Minimum Positioning Units (MPUs) to efficiently locate vibration signals. The single MPU of the SCSS can recognize the direction of collinear loads by regulating the stress field distribution and further, the coupling action of three MPUs can realize all-angle vibration monitoring in plane. Experiments demonstrate that the bionic positioning sensor achieves 1.43 degrees of angle-error-free accuracy without additional energy supply. As a proof of concept, two bionic positioning sensors and machine learning algorithm are integrated to provide centimeter (cm)-accuracy target localization, ideally suited for the man-machine interaction. The novel design offers a new mechanism for the design of traditional positioning devices, improving precision and efficiency in both the meta-universe and real-world Internet-connected systems.
文摘It is well-documented that phytochromes can control plant growth and development from germination to flowering. Additionally, these photoreceptors have been shown to modulate both biotic and abiotic stress. This has led to a series of studies exploring the molecular and biochemical basis by which phytochromes modulate stresses, such as salinity, drought, high light or herbivory. Evidence for a role of phytrochromes in plant stress tolerance is explored and reviewed.
