Li2MnSiO4 has an extremely high theoretical capacity of 332 mAh?g?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li2Mn...
详细信息
Li2MnSiO4 has an extremely high theoretical capacity of 332 mAh?g?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li2MnSiO4/carbon composite nanofibers were prepared by a combination of electrospinning and heat treatment. The one-dimensional continuous carbon nanofiber matrix serves as long-distance conductive pathways for both electrons and ions. The composite nanofiber structure avoids the aggregation of Li2MnSiO4 particles, which in turn enhances the electrode conductivity and promotes the reaction kinetics. The resultant Li2MnSiO4/carbon composite nanofibers were used as the cathode material for Li-ion batteries, and they delivered high charge and discharge capacities of 218 and 185 mAh?g?1, respectively, at the second cycle. In addition, the capacity retention of Li2MnSiO4 at the first 20th cycles increased from 37% to 54% in composite nanofibers.
Conventional textile-based wound dressings are cost-effective and highly absorbent, but used alone, fail to provide optimal wound healing conditions (hemostasis, non-adherence, maintenance of a moist wound bed, etc.)....
详细信息
Conventional textile-based wound dressings are cost-effective and highly absorbent, but used alone, fail to provide optimal wound healing conditions (hemostasis, non-adherence, maintenance of a moist wound bed, etc.). Modern wound dressings often incorporate multiple non-textile components (films, gels, antimicrobials, and biological forms) that provide advanced functionalities at a significantly higher cost. Electrospun nanofiber dressings have demonstrated the potential to revolutionize wound care by providing significantly enhanced moisture management, barrier properties, and bioactivity. However, nanofiber webs are inherently weak and difficult to handle. Deposition of electrospun nanofiber coatings on a conventional textile bandages addresses the need for structural support, but faces challenges of delamination due to compliance mismatch or poor adhesion. Atmospheric plasma has been shown to increase adhesion of coatings to fibers due to enhanced surface chemistry and/or morphology.
Among the various existing energy storage technologies, rechargeable lithium-ion batteries and supercapacitors have been considered as two important solutions to the increasing needs for high-performance electrochemic...
Among the various existing energy storage technologies, rechargeable lithium-ion batteries and supercapacitors have been considered as two important solutions to the increasing needs for high-performance electrochemical power sources. N ovel centrifugally-spun nanofibers with functional properties can dramatically alter surface reaction rates and charge transport throughout the batteries and supercapacitors,
Composite nanofibrous mats consisting of poly( L-lactideco-ε-caprolactone)( PLCL) and collagen type I( COL) were fabricated by electrospinning,and ten times simulated body fluid(10SBF) were employed to mineralize nan...
详细信息
Composite nanofibrous mats consisting of poly( L-lactideco-ε-caprolactone)( PLCL) and collagen type I( COL) were fabricated by electrospinning,and ten times simulated body fluid(10SBF) were employed to mineralize nanofibrous mats. Ballshaped hydroxyapatite( HA) was deposited on the surface of nanofibrous mats in 1. 5 h at room temperature. Human fetal osteoblasts( hFob) were seeded to investigate their proliferation and differentiation on mineralized composite nanofibrous mats. The results showed that hFob grew well on mineralized composite nanofibrous mats and alkaline phosphatase( ALP) activity of hFob on mineralized composite nanofibrous mats at 14 d was much higher than that on untreated nanofibrous mats. Moreover,the expression of osteocalcin of cells on mineralized composite nanofibrous mats was also much higher than those on untreated nanofibrous mats at 7 d and 14 d. This mineralized composite nanofibrous mats may have a great potential for bone tissue engineering.
暂无评论