通过静电纺丝制备出碳纤维,然后高温退火处理获得氮掺杂多孔碳纤维,并将其作为硫的宿主材料,最终得到NCNFs/S正极材料。利用XRD、TG、TEM等对N-CNFs/S复合电极材料的结构和形貌进行表征。N-CNFs/S作为正极材料组装的锂硫电池的电化学性...通过静电纺丝制备出碳纤维,然后高温退火处理获得氮掺杂多孔碳纤维,并将其作为硫的宿主材料,最终得到NCNFs/S正极材料。利用XRD、TG、TEM等对N-CNFs/S复合电极材料的结构和形貌进行表征。N-CNFs/S作为正极材料组装的锂硫电池的电化学性能测试结果表明,在167 m A/g和836 m A/g的电流密度下,N-CNFs/S复合电极材料循环250圈和500圈后容量分别高达836 m A·h/g和631 m A·h/g;同时,N-CNFs/S复合电极材料还表现出良好的倍率性能。展开更多
In this paper, a new carbon fiber based cathode — a low-outgassing-rate carbon fiber array cathode — is investigated experimentally, and the experimental results are compared with those of a polymer velvet cathode. ...In this paper, a new carbon fiber based cathode — a low-outgassing-rate carbon fiber array cathode — is investigated experimentally, and the experimental results are compared with those of a polymer velvet cathode. The carbon fiber array cathode is constructed by inserting bunches of carbon fibers into the cylindrical surface of the cathode. In experiment, the diode base pressure is maintained at 1×10^（-2） Pa–2×10^（-2） Pa, and the diode is driven by a compact pulsed power system which can provide a diode voltage of about 100 kV and pulse duration of about 30 ns at a repetition rate of tens of Hz.Real-time pressure data are measured by a magnetron gauge. Under the similar conditions, the experimental results show that the outgassing rate of the carbon fiber array cathode is an order smaller than that of the velvet cathode and that this carbon fiber array cathode has better shot-to-shot stability than the velvet cathode. Hence, this carbon fiber array cathode is demonstrated to be a promising cathode for the radial diode, which can be used in magnetically insulated transmission line oscillator（MILO） and relativistic magnetron（RM）.展开更多
文摘通过静电纺丝制备出碳纤维,然后高温退火处理获得氮掺杂多孔碳纤维,并将其作为硫的宿主材料,最终得到NCNFs/S正极材料。利用XRD、TG、TEM等对N-CNFs/S复合电极材料的结构和形貌进行表征。N-CNFs/S作为正极材料组装的锂硫电池的电化学性能测试结果表明,在167 m A/g和836 m A/g的电流密度下,N-CNFs/S复合电极材料循环250圈和500圈后容量分别高达836 m A·h/g和631 m A·h/g;同时,N-CNFs/S复合电极材料还表现出良好的倍率性能。
基金Project supported by the National Natural Science Foundation of China(Grant No.61671457)
文摘In this paper, a new carbon fiber based cathode — a low-outgassing-rate carbon fiber array cathode — is investigated experimentally, and the experimental results are compared with those of a polymer velvet cathode. The carbon fiber array cathode is constructed by inserting bunches of carbon fibers into the cylindrical surface of the cathode. In experiment, the diode base pressure is maintained at 1×10^（-2） Pa–2×10^（-2） Pa, and the diode is driven by a compact pulsed power system which can provide a diode voltage of about 100 kV and pulse duration of about 30 ns at a repetition rate of tens of Hz.Real-time pressure data are measured by a magnetron gauge. Under the similar conditions, the experimental results show that the outgassing rate of the carbon fiber array cathode is an order smaller than that of the velvet cathode and that this carbon fiber array cathode has better shot-to-shot stability than the velvet cathode. Hence, this carbon fiber array cathode is demonstrated to be a promising cathode for the radial diode, which can be used in magnetically insulated transmission line oscillator（MILO） and relativistic magnetron（RM）.
