Preparation Of Transition Metal Oxide By Electrospinning And Its Application In Lithium Ion Batteries And Gas Sensing Sensors

Energy is closely linked with people's daily life,but fuel energy,used as main power source,cause environmental pollution and greenhouse effect due to their burnable product.Therefore,development of new power sources and transducer for environmental monitoring have become searching hotspots.Lithium ion batteries,which though has become one of commercial new power sources,needs to improve their electrochemical performance to meet new societal requirements,such as higher reversible capacity,longer lifespan.Therefore,development advanced anode material could be the key.Graphite,as the main commercial anode material,can provide good cycle performance and limited capacity,only 372 mAh/g.on the contrary,silicon has the highest capacity of near ten times than that of graphite,however huge volume change,occurs during cycling,causes the capacity fade down very quickly.Capable of high capacity and long cycle life,transition metal oxides can be the next generation anode materials for lithium ion batteries.Gas sensor plays an important role for environment monitoring.As the most focused and investigated gas sensor,semi-conductor gas sensor has a simple detecting means and high sensibility,which make it superior than other gas sensors.Nowadays,SnO₂ and In2O3 are one of the most investigated materials for gas sensor.Development more sensitive and stable materials as well as search new sensing mechanism for different materials for gas sensor,is still a main project.This paper investigated electrochemical performance of one-dimensional nanomaterials,made by electrostatic spinning,as an anode material for lithium ion batteries and sensing ability as gas sensor.The specific summary of this paper are as bellows:?1?The synthesis of MnO/GO nanowires through electrostatic spinning.Using the ethanol solution of GO as the precursor solution for electrostatic spinning,the as-made composite nanowires could have an enhanced conductivity and mechanical strength.When tested as an anode material for lithium ion batteries,the nanowires can stain a reversible capacity of 813 mAh/g after 150 cycles at a current density of 100 mA/g.?2?The synthesis of SnO₂/Nb₂O₅ nanowires.We investigated the specific surface and surface state of the composite SnO₂/Nb₂O₅ nanowires and SnO₂ nanowires,through various testing instruments,such as Brunauer-Emmett-Teller?BET?method and X-ray photoelectron spectroscopy.The enhanced sensitive ability of composite nanowires applied in sensor device could be the results of higher specific surface and concentration of vacancy oxygen.