The emergence of Li–Mg hybrid batteries has been receiving attention,owing to their enhanced electrochemical kinetics and reduced overpotential.Nevertheless,the persistent challenge of uneven Mg electrodeposition rem...The emergence of Li–Mg hybrid batteries has been receiving attention,owing to their enhanced electrochemical kinetics and reduced overpotential.Nevertheless,the persistent challenge of uneven Mg electrodeposition remains a significant impediment to their practical integration.Herein,we developed an ingenious approach that centered around epitaxial electrocrystallization and meticulously controlled growth of magnesium crystals on a specialized MgMOF substrate.The chosen MgMOF substrate demonstrated a robust affinity for magnesium and showed minimal lattice misfit with Mg,establishing the crucial prerequisites for successful heteroepitaxial electrocrystallization.Moreover,the incorporation of periodic electric fields and successive nanochannels within the MgMOF structure created a spatially confined environment that considerably promoted uniform magnesium nucleation at the molecular scale.Taking inspiration from the“blockchain”concept prevalent in the realm of big data,we seamlessly integrated a conductive polypyrrole framework,acting as a connecting“chain,”to interlink the“blocks”comprising the MgMOF cavities.This innovative design significantly amplified charge‐transfer efficiency,thereby increasing overall electrochemical kinetics.The resulting architecture(MgMOF@PPy@CC)served as an exceptional host for heteroepitaxial Mg electrodeposition,showcasing remarkable electrostripping/plating kinetics and excellent cycling performance.Surprisingly,a symmetrical cell incorporating the MgMOF@PPy@CC electrode demonstrated impressive stability even under ultrahigh current density conditions(10mAcm^(–2)),maintaining operation for an extended 1200 h,surpassing previously reported benchmarks.Significantly,on coupling the MgMOF@PPy@CC anode with a Mo_(6)S_(8) cathode,the assembled battery showed an extended lifespan of 10,000 cycles at 70 C,with an outstanding capacity retention of 96.23%.This study provides a fresh perspective on the rational design of epitaxial electrocrystallization driven by metal–organic framework(MOF)substrates,paving the way toward the advancement of cuttingedge batteries.展开更多
Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the...Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the non-avian dinosaurs,there is emerging evidence that previously overlooked taxa experienced stark morphological and evolutionary stasis.In this study,we report both adult and larva of beetles of the genus Loricera preserved in mid-Cretaceous Kachin amber(Figure 1),which display striking similarity to extant congeners,indicating a stasis of their specialized feeding behavior persisting at least 100 million years.展开更多
Passive cooling strategy shows great potential in mitigating global warming and reducing energy consumption.Because of the high emissivity in the atmospheric transparency window(λ≈8–13μm),cellulose is considered a...Passive cooling strategy shows great potential in mitigating global warming and reducing energy consumption.Because of the high emissivity in the atmospheric transparency window(λ≈8–13μm),cellulose is considered as a good candidate for radiative cooling.However,traditional cellulose coolers generally show poor solar reflection and can be polluted by dust outside,thereby resulting in poor daytime cooling efficiency.To address these drawbacks,we developed sustainable cellulose nanowhiskers(CNWs)/ZnO composite aerogel films with favorable optical performance,mechanical robustness,and self-cleaning function for efficient daytime radiative cooling,which can be achieved via freeze casting and hot-pressing process.Due to formation of multi-level porous structure and chemical bonds(Si-O-C/Si-O-Si),such aerogel film exhibited high solar reflectance(97%)and high infrared emittance(92.5%).It achieved a sub-ambient temperature drop of 6.9℃under direct sunlight in hot weather.Most importantly,the surface roughness and low surface energy enable cellulose aerogel film hydrophobicity(contact angle=133°),thereby resulting in an anti-dust function.This work provides insight into the design of sustainable thermal regulating materials to realize carbon neutrality.展开更多
Taxonomy plays an important role in understanding the origin, evolution, and ecological functionality of biodiversity. There are large number of unknown species yet to be described by taxonomists, which together with ...Taxonomy plays an important role in understanding the origin, evolution, and ecological functionality of biodiversity. There are large number of unknown species yet to be described by taxonomists, which together with their ecosystem services cannot be effectively protected prior to description. Despite this, taxonomy has been increasingly underrated insufficient funds and permanent positions to retain young talents. Further, the impact factordriven evaluation systems in China exacerbate this downward trend, so alternative evaluation metrics are urgently necessary. When the current generation of outstanding taxonomists retires,there will be too few remaining taxonomists left to train the next generation. In light of these challenges, all co-authors worked together on this paper to analyze the current situation of taxonomy and put out a joint call for immediate actions to advance taxonomy in China.展开更多
A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 p...A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 primarily based on the paired setose projections on head,apparently 1-segmented antennal club,and transverse procoxal cavities with exposed trochantins.It differs from the previously reported C.birmanicus Peris&Delclòs from the same deposit in the more narrowly separated projections(cephalic horns)on vertex and the absence of elytral absutural lines.Our discovery of a new monotomid species from the mid-Cretaceous amber highlights the palaeodiversity and morphological disparity of the family in the late Mesozoic.展开更多
基金National Natural Science Foundation of China,Grant/Award Number:31770608Postgraduate Research&Practice Innovation Program of Jiangsu Province,Grant/Award Number:KYCX22_1081Jiangsu Specially‐appointed Professorship Program,Grant/Award Number:Sujiaoshi[2016]20。
文摘The emergence of Li–Mg hybrid batteries has been receiving attention,owing to their enhanced electrochemical kinetics and reduced overpotential.Nevertheless,the persistent challenge of uneven Mg electrodeposition remains a significant impediment to their practical integration.Herein,we developed an ingenious approach that centered around epitaxial electrocrystallization and meticulously controlled growth of magnesium crystals on a specialized MgMOF substrate.The chosen MgMOF substrate demonstrated a robust affinity for magnesium and showed minimal lattice misfit with Mg,establishing the crucial prerequisites for successful heteroepitaxial electrocrystallization.Moreover,the incorporation of periodic electric fields and successive nanochannels within the MgMOF structure created a spatially confined environment that considerably promoted uniform magnesium nucleation at the molecular scale.Taking inspiration from the“blockchain”concept prevalent in the realm of big data,we seamlessly integrated a conductive polypyrrole framework,acting as a connecting“chain,”to interlink the“blocks”comprising the MgMOF cavities.This innovative design significantly amplified charge‐transfer efficiency,thereby increasing overall electrochemical kinetics.The resulting architecture(MgMOF@PPy@CC)served as an exceptional host for heteroepitaxial Mg electrodeposition,showcasing remarkable electrostripping/plating kinetics and excellent cycling performance.Surprisingly,a symmetrical cell incorporating the MgMOF@PPy@CC electrode demonstrated impressive stability even under ultrahigh current density conditions(10mAcm^(–2)),maintaining operation for an extended 1200 h,surpassing previously reported benchmarks.Significantly,on coupling the MgMOF@PPy@CC anode with a Mo_(6)S_(8) cathode,the assembled battery showed an extended lifespan of 10,000 cycles at 70 C,with an outstanding capacity retention of 96.23%.This study provides a fresh perspective on the rational design of epitaxial electrocrystallization driven by metal–organic framework(MOF)substrates,paving the way toward the advancement of cuttingedge batteries.
基金National Natural Science Foundation of China(41925008,42222201,and 42288201)Second Tibetan Plateau Scientific Expedition and Research project(2019QZKK0706)Y.-D.L.is supported by a scholarship granted by the China Scholarship Council(202108320010).
文摘Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the non-avian dinosaurs,there is emerging evidence that previously overlooked taxa experienced stark morphological and evolutionary stasis.In this study,we report both adult and larva of beetles of the genus Loricera preserved in mid-Cretaceous Kachin amber(Figure 1),which display striking similarity to extant congeners,indicating a stasis of their specialized feeding behavior persisting at least 100 million years.
基金the Start-up Funds for Scientific Research at the Nanjing Forestry University(No.163020337)Jiangsu Specially-appointed Professorship Program(No.Sujiaoshi[2016]20)Science and Technology Innovation Project for Overseas Students of Nanjing City(No.Ningrenshehan[2018]214).
文摘Passive cooling strategy shows great potential in mitigating global warming and reducing energy consumption.Because of the high emissivity in the atmospheric transparency window(λ≈8–13μm),cellulose is considered as a good candidate for radiative cooling.However,traditional cellulose coolers generally show poor solar reflection and can be polluted by dust outside,thereby resulting in poor daytime cooling efficiency.To address these drawbacks,we developed sustainable cellulose nanowhiskers(CNWs)/ZnO composite aerogel films with favorable optical performance,mechanical robustness,and self-cleaning function for efficient daytime radiative cooling,which can be achieved via freeze casting and hot-pressing process.Due to formation of multi-level porous structure and chemical bonds(Si-O-C/Si-O-Si),such aerogel film exhibited high solar reflectance(97%)and high infrared emittance(92.5%).It achieved a sub-ambient temperature drop of 6.9℃under direct sunlight in hot weather.Most importantly,the surface roughness and low surface energy enable cellulose aerogel film hydrophobicity(contact angle=133°),thereby resulting in an anti-dust function.This work provides insight into the design of sustainable thermal regulating materials to realize carbon neutrality.
基金mainly supported by National Science Fund for Distinguished Young Scholars (31625024)a grant (2008DP173354) from the Key Laboratory of the Zoological Systematics and Evolution of the Chinese Academy of Sciences。
文摘Taxonomy plays an important role in understanding the origin, evolution, and ecological functionality of biodiversity. There are large number of unknown species yet to be described by taxonomists, which together with their ecosystem services cannot be effectively protected prior to description. Despite this, taxonomy has been increasingly underrated insufficient funds and permanent positions to retain young talents. Further, the impact factordriven evaluation systems in China exacerbate this downward trend, so alternative evaluation metrics are urgently necessary. When the current generation of outstanding taxonomists retires,there will be too few remaining taxonomists left to train the next generation. In light of these challenges, all co-authors worked together on this paper to analyze the current situation of taxonomy and put out a joint call for immediate actions to advance taxonomy in China.
基金Financial support was provided by the Second Tibetan Plateau Scientific Expedition and Research project(2019QZKK0706)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB26000000 and XDB18000000)the National Natural Science Foundation of China(41688103)。
文摘A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 primarily based on the paired setose projections on head,apparently 1-segmented antennal club,and transverse procoxal cavities with exposed trochantins.It differs from the previously reported C.birmanicus Peris&Delclòs from the same deposit in the more narrowly separated projections(cephalic horns)on vertex and the absence of elytral absutural lines.Our discovery of a new monotomid species from the mid-Cretaceous amber highlights the palaeodiversity and morphological disparity of the family in the late Mesozoic.
