Results 111 to 120 of about 19,074 (308)

Contra‐Diffusion Engineering of Single‐Atom Catalytic Interlayers Enables Reversible Sulfur Redox Chemistry

Angewandte Chemie International Edition, EarlyView.
A contra‐diffusion strategy is introduced to grow uniformly distributed Co–Nx single‐atom catalysts (CoSAs) within a carbonized aramid nanofiber (CANF) interlayer. The resulting CD‐CANF enables efficient polysulfide regulation, low metal loading, and exceptional long‐term cycling stability in lithium–sulfur batteries. ABSTRACT Achieving durable lithium–
Yan‐Jhang Chen, Tsung‐I. Yeh, Chia‐Yu Chang, Wei‐Ming Huang, Jing‐Yu Li, Mohamed Gamal Mohamed, Shiao‐Wei Kuo, Bing‐Joe Hwang, Yun‐Sheng Ye   +8 more
wiley   +1 more source

Magellan/Galileo solder joint failure analysis and recommendations [PDF]

On or about November 10, 1988 an open circuit solder joint was discovered in the Magellan Radar digital unit (DFU) during integration testing at Kennedy Space Center (KSC).
Ross, Ronald G., Jr.
core   +1 more source

Intumescent Coatings as Fire Retardants [PDF]

, 1970
Fire-retardant paint, when activated by the heat of fire, reacts to form a thick, low-density, polymeric coating or char layer.
Fish, R. H., Fohlen, G. M., Parker, J. A., Sawko, P. M.   +3 more
core   +2 more sources

Ultrafast Sodium‐Ion Storage in Self‐Doped 2D PVP‐VS4/Ti3C2Tx Hybrids for High‐Performance Sodium‐Ion Half/Full Batteries

Carbon Energy, EarlyView.
Self‐doped PVP‐VS4/Ti3C2Tx with sulfur vacancies enhances the structural stability and exhibits excellent electrochemical performance. ABSTRACT Transition metal sulfides demonstrate remarkable theoretical specific capacities, making them highly desirable anode materials for sodium‐ion batteries (SIBs).
Mingxuan Tang, Yali Cao, Xinxin Yin, Huan Ma, Xuntao Zhang, Dianzeng Jia   +5 more
wiley   +1 more source

Enzymes that generate and regulate intracellular persulfides and polysulfides: mechanistic insights and inhibitors

Frontiers in Physiology
Reactive sulfur species (RSS), which include various persulfides and polysulfides, are generated by multiple enzymes in vivo and play critical roles in mammalian physiological processes such as redox signaling, metabolic regulation, radical scavenging ...
Ko Hirabayashi, Eita Sasaki, Hisashi Ohno, Orie Takayama, Sota Yamada, Kenjiro Hanaoka, Kenjiro Hanaoka   +6 more
doaj   +1 more source

Performance of an ablator for Space Shuttle inorbit repair in an arc-plasma airstream [PDF]

An ablator patch material performed well in an arc plasma environment simulating nominal Earth entry conditions for the Space Shuttle. Ablation tests using vacuum molded cones provided data to optimize the formulation of a two part polymer system for ...
Cuellar, M., Flowers, O., Stewart, D. A.
core   +1 more source

Organic cathode for a secondary battery [PDF]

, 1989
A liquid catholyte for a battery based on liquid metal such as sodium anode and a solid, ceramic separator such as beta alumina (BASE) comprises a mixture of a Group I-III metal salt such as sodium tetrachloroaluminate and a minor amount of an organic ...
Bankston, Clyde P., Bugga, Ratnakumar V., Distefano, Salvador, Williams, Roger M.   +3 more
core   +1 more source

Enabling Wide‐Temperature Range Li‐S Batteries via Asymmetric‐Coordinated Titanium Sites‐Implanted Graphene Single‐Atom Electrocatalysts

Carbon Energy, EarlyView.
A Ti‐based single‐atom catalyst featuring isolated Ti atoms anchored on reduced graphene oxide (Ti‐rGO) has been successfully synthesized as a sulfur host material. This Ti‐rGO composite effectively integrates the robust adsorption capacity of Ti‐O5 coordination groups toward LiPSs with the rapid mass transport kinetics inherent to its porous ...
Shilin Chen, Kaijie Miao, Tao Ban, Jiangqi Zhou   +3 more
wiley   +1 more source

Redox Mediator: A New Strategy in Designing Cathode for Prompting Redox Process of Li–S Batteries

Advanced Science, 2019
The multistep redox reactions of lithium–sulfur batteries involve undesirably complex transformation between sulfur and Li2S, and it is tough to spontaneously fragmentate polysulfides into shorter chains Li2S originating from the sluggish redox kinetics ...
Xian Wu, Nannan Liu, Bin Guan, Yue Qiu, Maoxu Wang, Junhan Cheng, Da Tian, Lishuang Fan, Naiqing Zhang, Kening Sun   +9 more
doaj   +1 more source

Engineering Spin State of Ni Single‐Atoms to Enhance Electrocatalytic Activity of Sulfur Conversion in Lithium–Sulfur Batteries

Carbon Energy, EarlyView.
Ni SACs with high‐spin state show strong catalytic activity toward lithium polysulfides (LPSs), whereas the Ni SACs with low‐spin state have strong adsorption capacity for LPSs. Therefore, the preparation of Ni SACs with an intermediate spin state by controlling pyridinic N and pyrrolic N enables an excellent balance between the adsorption and ...
Mengyang Li, Guiqiang Cao, Yiming Qi, Chenyang Hou, Xuexia Song, Ruixian Duan, Huijuan Yang, Yifan Li, Xiaorui Chen, Zongnan Lv, Qinchuan Chen, Yitong Yuan, Guohua Liu, Yuhui Xu, Jingjing Wang, Wenbin Li, Xifei Li   +16 more
wiley   +1 more source